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Choosing the correct TBR tire size directly affects truck safety, fuel efficiency, carrying capacity, and fleet operating costs. For regional transportation fleets, 12R22.5 and 315/80R22.5 are two widely used drive axle tire sizes, but they are not interchangeable. However, they are not exactly the same. The LANDER SEA LS302+ comes in both sizes. It serves as a dependable regional TBR tire for paved routes and varied daily tasks. This guide looks at the two choices. It helps fleets, dealers, and truck owners pick the best specification.   What Do 12R22.5 and 315/80R22.5 Mean? These two sizes rely on distinct naming rules. Understanding each format properly is the initial step. You must do this before checking load limits, rim matching, and vehicle fitment. What Does 12R22.5 Mean? In the 12R22.5 format, “12” stands for a nominal section width in inches. The letter “R” indicates radial construction. Finally, “22.5” shows the rim diameter in inches. For the LS302+, this size holds an 18PR rating. It features a 152/149L load index and speed symbol. It fits a 9.00-inch standard rim. The listed section width is 300 mm. Its overall diameter reaches 1,085 mm. The tread depth is 18 mm. What Does 315/80R22.5 Mean? In the 315/80R22.5 format, “315” shows the nominal tire width in millimeters. The number “80” represents the aspect ratio. The “R” means radial construction. The “22.5” is the rim diameter in inches. For the LS302+, this size carries a 20PR rating with a 156/150L mark. It also mounts on a 9.00-inch standard rim. The stated section width measures 312 mm. The overall diameter is 1,076 mm. It has a tread depth of 20 mm. How Do the Two LS302+ Sizes Compare? Both sizes fall under the LS302+ regional drive-position series. Yet, their physical dimensions and load ratings vary. Buyers need to examine the full specification. They should not look solely at the shared 22.5-inch rim diameter. What Are the Main Specification Differences? Specification 12R22.5 315/80R22.5 Ply rating 18PR 20PR Load index and speed symbol 152/149L 156/150L Standard rim 9.00 9.00 Section width 300 mm 312 mm Overall diameter 1,085 mm 1,076 mm Tread depth 18 mm 20 mm Maximum single load 3,550 kg 4,000 kg Maximum dual load 3,250 kg 3,350 kg Listed inflation pressure 930 kPa 850 kPa The 315/80R22.5 option is broader. It supports a greater listed load. Additionally, it offers 2 mm more original tread depth. The 12R22.5 option is a bit taller. This might be more useful for fleets that already use this classic size. These details come from the official LS302+ product specifications. Does a Higher Load Rating Always Mean a Better Choice? No. A greater load index does not instantly make one tire superior for every regional truck. The right choice still relies on the tire sizes authorized by the vehicle maker. It depends on the true axle load, rim fit, dual-tire spacing, and route speed. Road conditions and standard operating pressure matter too. Buyers must align the tire with the actual job. They should not pick based just on load rating or tread depth. Which LS302+ Size Better Fits Your Regional Truck? Begin with the tire size authorized by the truck builder. Next, you can assess the vehicle’s working load and the existing wheel setup. Look at your maintenance routine and the local replacement market demand. When Should You Choose 12R22.5? Select the 12R22.5 LS302+ if the truck is authorized and already set up for this dimension. It works well for fleets whose rims and spare tire stocks rely on 12R22.5. Maintenance tools and replacement steps should match too. It can also be a sensible choice for steady regional routes. This is true when the real axle load stays within the stated limit. For distributors, the 12R22.5 can be vital for business. This applies to markets where older inch-based commercial tire sizes stay very popular. Keeping the same authorized size can ease inventory tracking. It also minimizes fitment issues across an existing fleet. When Should You Choose 315/80R22.5? Select the 315/80R22.5 LS302+ if it is an authorized vehicle size. Choose it when the job demands its greater listed load index. This size might suit newer metric-size trucks. It fits markets with heavy replacement demand for 315/80R22.5 tires. Its 312 mm stated section width and 20 mm tread depth can also benefit specific fleet replacement strategies. Still, the greater load rating does not eliminate the need to inspect the rim and axle position. You must check inflation rules, vehicle clearance, and the actual operating load. What Should You Check Before Switching Sizes? Moving from one commercial tire size to another needs a thorough fitment check. Sharing a 22.5-inch rim mark does not make the 12R22.5 and 315/80R22.5 instantly swappable. Are the Vehicle and Rim Compatible? Review the vehicle manual or ask the truck maker before altering sizes. Verify the authorized tire size and rim width. Check wheel condition, suspension clearance, and brake clearance. Ensure there is enough free space around the tire. Both LS302+ sizes mention a 9.00-inch standard rim. However, this detail alone does not guarantee that every truck can swap between the two dimensions. Are Load and Dual-Tire Matching Correct? Measure the real axle load while the truck works under standard conditions. Contrast this number with the tire’s stated single or dual load limit. For dual-wheel setups, utilize tires with matching dimensions and construction. Tread depth and inflation pressure must align too. Badly matched dual tires can cause uneven load spread and irregular wear. They lead to higher tire temperatures and extra maintenance expenses. Fleets should avoid adjusting tire pressure based on broad online advice. The proper operating pressure must match the tire specification and the true load. It should follow vehicle guidelines and relevant local laws.   Why Choose QINGDAO LANDER-SKY TYRE CO., LTD as a TBR Tire Supplier? A trustworthy TBR tire supplier should assist buyers in matching the tire to the vehicle. They must consider axle position, load, and route before talking only about price. This is deeply important for importers, distributors, fleet managers, and replacement tire dealers. How Does LANDER SEA Support TBR Tire Buyers? QINGDAO LANDER-SKY TYRE CO., LTD provides TBR and other commercial tire items for global markets. For LS302+ questions, buyers can share the needed tire size and axle position. Tell them about road conditions, route type, and load needs. Include order quantity, target market, and any certificate or packaging requests. The company can also talk about minimum order quantities and mixed-container choices. They cover lead times and OEM packaging. This application-focused method helps B2B buyers set up orders more smoothly. It lowers the danger of picking a wrong specification. Conclusion Pick the 12R22.5 LS302+ if your truck is authorized for this dimension. It is ideal if your fleet prefers matching with existing inch-size gear, spare stocks, and maintenance habits. Look at the 315/80R22.5 LS302+ if the vehicle accepts the metric size. Choose it if the task needs its greater listed load limit, wider section, or deeper tread. Before buying, verify the rim, axle position, and real load. Check inflation rules, dual-tire matching, road conditions, and local laws. Giving these details to LANDER SEA will help make the tire suggestion and price quote much more precise. FAQs Can 12R22.5 and 315/80R22.5 Be Used Interchangeably? Not instantly. Their rim diameter matches, but their width and overall diameter differ. Load index, ply rating, pressure rules, and fitment needs also vary. Verify vehicle approval and rim matching. Check available clearance and dual-tire spacing before making a switch. Which LS302+ Size Has the Higher Load Capacity? The 315/80R22.5 LS302+ delivers the greater listed capacity. Its peak single load hits 4,000 kg. This compares to 3,550 kg for the 12R22.5 model. Its peak dual load reaches 3,350 kg. The 12R22.5 offers 3,250 kg. What Information Is Needed for an LS302+ Quotation? Supply the needed tire size, vehicle type, and axle position. Include the true load, route type, and road condition. Share the order quantity, target market, and destination. Add any certificate or packaging needs. These facts help the supplier assess the task and build a more accurate quote.

Certain TBR tires can fit on both steer and trailer axles. However, this does not mean every commercial truck tire works in all wheel positions. Steer tires must deliver accurate directional control and steady highway handling. They also need strong resistance to irregular wear. Meanwhile, trailer tires require stable free rolling and low heat buildup. They must resist scrub well. Before using a single tire pattern in both spots, fleet managers and owner-operators must check several details. Distributors and replacement buyers should verify the manufacturer’s position approval. They must also confirm the tire size, load index, and speed symbol. Furthermore, inflation rules, road conditions, and vehicle setup are crucial factors.   Can One TBR Tire Really Be Used on Both Axle Positions? The answer relies on how the manufacturer designed and labeled the tire. Buyers should never assume a straight-rib tread makes a tire fit for both uses. A matching tire size does not automatically mean it works everywhere. When Is the Answer Yes? A TBR tire works in both spots when its product sheet marks it as a steer/trailer or all-position tire. Commercial tire makers build some all-position models approved for multiple axle locations. Other products are made strictly for steer, drive, or trailer duties. Bridgestone’s commercial tire guide clearly tells buyers to look at the planned wheel position. They must also consider the service type before picking a tread. A steer/trailer model normally features a rib-style tread. It avoids the large transverse blocks often seen on drive tires. Circumferential ribs boost directional stability and help with free rolling. This makes the pattern a great choice for many highway steer and trailer tasks. When Should the Tire Not Be Moved Between Positions? A tire must not move to another axle if the maker rejects that position. It is also wrong if the size, load rating, or speed limit falls short. The rim or working pressure must meet the vehicle’s exact needs. Drive tires serve as a clear example. Their block or lug patterns are built to transfer engine torque and give solid traction. They often create more noise and rolling resistance than a standard highway rib tire. Furthermore, they might lack the quick steering response needed on the front axle. Bridgestone points out that rib designs fit best on steer and trailer spots. Lug designs belong mainly on drive axles. Why Do Steer and Trailer Axles Need Different Performance? Even though both spots might use a similar rib pattern, the physical forces are quite different. Buyers must look at how the truck runs. They should not pick a tire just by its looks. What Does a Steer-Axle Tire Need to Do? The steer axle guides the vehicle’s path. Therefore, the tires must offer reliable response and firm straight-line stability. They need good wet-road grip and strong defense against uneven shoulder or rib wear. In long-haul work, low noise and managed heat buildup matter a lot. High-speed ability is also vital. Uneven front-tire wear can result from bad alignment or poor balance. Suspension flaws, wrong pressure, and tough driving routes play a part too. A tire approved for steer use still demands proper vehicle care to give steady service. What Does a Trailer Tire Need to Do? Trailer tires do not handle engine torque. Yet, they carry heavy loads and face sharp lateral scrubbing during turns. Spread-axle trailers and constant tight maneuvers cause huge scrub forces. Urban delivery routes add to this stress. For highway trailer use, buyers usually want smooth free rolling and strong defense against irregular wear. Low heat buildup and firm load support are top goals. A steer/trailer tire can do a great job if its build and tread fit both spots. Still, the running conditions must match the product’s main purpose. Bridgestone names high-speed capacity and low rolling resistance as key traits. Irregular-wear defense is also crucial for line-haul trailer tires. What Should Buyers Check Before Using the Same Pattern? Running one tire model on two axle positions can make stock and buying much easier. However, this choice must rely on strict specs rather than pure convenience. Is the Tire Officially Approved for Both Positions? The product page, data sheet, or maker’s written guide must clearly state the allowed positions. Words like all-position or steer/trailer give helpful clues. Position icons offer good guidance too. Do not trust claims that a pattern simply “looks like a steer tire.” Two similar rib patterns might feature totally different rubber mixes. They could have distinct casing builds, tread depths, and load ratings. Their planned working conditions can differ greatly. Do the Load Index and Tire Size Match the Vehicle? Review the complete sidewall mark. This includes the tire size, ply rating, and load range. Check the load index, speed symbol, and standard rim size. Look at both single and dual load limits. A tire’s load limit can change between single and dual setups. Steer-axle tires are mostly mounted as singles. In contrast, many trailer axles rely on dual pairs. Buyers must check the real axle load against the proper single or dual rating. They should never rely solely on the basic tire size. The truck must be weighed when fully packed. Each axle needs a separate check. Michelin suggests comparing real gross axle weights with the tire maker’s charts. This helps find the exact load capacity and right air pressure. Does the Tread Match the Route? A highway steer/trailer rib tire is not an instant fit for rough mine roads or busy building sites. It struggles in deep mud or harsh mixed-service paths. Straight grooves work much better on smooth paved roads. They suit steady speeds and long trips. Buyers must think about total yearly miles and highway time. Rainfall, road quality, and average speed matter greatly. Turning frequency, axle layout, and planned load are also key. A tire built for smooth highways might wear out fast on sharp rocks. Poorly kept roads can cause severe damage. How Does the LS217 Fit Steer and Trailer Applications? QINGDAO LANDER-SKY TYRE presents the LS217 as a strict long-haul TBR tire. It is made for highway steer and trailer wheel duties. What Are the Main LS217 Specifications? The stated LS217 size is 11R24.5, packing 18PR. It shows a 149/146 load index and an M speed symbol. The tire fits an 8.25-inch standard rim. Its official sheet lists a 3,250 kg single-load limit and a 3,000 kg dual-load limit. It features a 13.5 mm tread depth and a suggested air pressure of 830 kPa. The 149/146 mark is highly vital for dual-position tasks. It gives distinct load indices for single and dual mounting. Buyers must still check the needed capacity against true axle weights. Vehicle papers and local rules must be followed. Which Roads Suit the LS217? The LS217 features four straight circumferential grooves. It is built for highways and solid paved roads. Its main goals include steady steer/trailer handling and rapid wet-road drainage. It aims for lower heat buildup and a quieter highway ride. It must not replace a thick-lug drive tire or a tough mine-road pattern. Buyers driving on mixed, broken, or off-road paths must share route facts before choosing this model.   How Should Fleets Install and Maintain Steer/Trailer Tires? Getting the right position approval is just the start. Good setup and care habits impact safety, total mileage, and handling. They also protect the casing shape. Should Tires Be Matched Across the Same Axle? Tires on one axle must match in size, build, and load limit. They should have similar remaining tread. Big gaps in diameter or tread depth can trigger uneven loading. This causes irregular wear, especially in dual pairs. All tires must go on approved rims. They need careful checks for damage, age, and bead health. Past repairs must be reviewed. Any planned swap between steer and trailer spots must follow the tire provider’s rules. The fleet’s own care policy applies too. How Should Inflation Pressure Be Set? The pressure printed on a product page or sidewall is not a magic number for every truck. The right pressure comes from the real axle load and tire size. The single or dual setup matters. The maker’s load-and-inflation chart is the best guide. Pressure must be tested when the tires sit cold. Michelin tells fleets to weigh each axle alone. Then, adjust the pressure to fit the load and task. Keep equal pressure across tires on the same axle when possible. Why Choose QINGDAO LANDER-SKY TYRE CO., LTD.? A solid TBR tire supplier helps buyers match tire position, size, and road state. They review load limits and market demands before sealing an order. What Makes LANDER SKY TYRE a Reliable Supplier? Started in 2013, QINGDAO LANDER-SKY TYRE CO., LTD. delivers TBR, OTR, farm, factory, and forklift tires. The firm runs five workshops with tight quality checks. It offers a three-year warranty and fast after-sales help. It serves clients across many global markets. To get an LS217 quote, buyers should share the needed size and axle spot. They must detail the driving route and order amount. The target country and packaging needs are also helpful. The firm shares facts on MOQ, mixed-container choices, lead times, and OEM packing. What Is the Final Decision? The same TBR tire fits on steer and trailer axles only if the maker clears both spots. The specs must fit the truck’s true working conditions. Buyers have to check the load limit, single or dual setup, and speed rating. Rim match, air pressure, road type, and planned duty are critical. The LS217 is made strictly for highway steer and trailer tasks. Its straight-groove design is a smart pick for long-haul buyers. It offers steady handling, rapid wet-road drainage, and low heat buildup. It ensures a quiet paved-road trip. FAQs Can I Install a Drive Tire on the Steer Axle? Normally, buyers should pick a tire cleared specifically for steer or all-position duty. Drive-tire lug patterns focus mostly on torque and grip. They might fail to give the sharp steering response or low noise needed on the front axle. Their rolling traits may not fit well. Can an LS217 Be Used on Both the Tractor Steer Axle and Trailer? The LS217 is marked for highway steer and trailer spots. Buyers must still make sure the 11R24.5 size and load limit fit. The rim type, speed symbol, and air needs must match each truck and axle perfectly. What Information Should I Send for an LS217 Quotation? Please send the tire size, planned axle spot, and average axle load. Share the maximum load, road conditions, and yearly miles. Include the order amount, target country, and packing needs. These facts help LANDER SKY TYRE check product fit and build a highly accurate quote.

Selecting the proper TBR on & off road tires is crucial for construction trucks, dump trucks, and mixer trucks. It also matters for fleet vehicles that travel across paved roads, gravel sections, muddy jobsites, and quarry entrances. These trucks often navigate rough rural routes as well. Unlike long-haul tires that mostly operate on highways, on & off road truck tires must balance several factors. They need good traction, cut resistance, and heat control. They also require adequate load capacity, self-cleaning ability, and long wear life. For fleet owners, drivers, distributors, and project contractors, the correct tire brings many benefits. It can reduce downtime and improve overall safety. It lowers replacement frequency and keeps vehicles moving during demanding mixed-route operations.   Why Do Construction Trucks Need Special TBR On & Off Road Tires? Construction trucks frequently encounter road conditions that shift multiple times during a single trip. A vehicle might leave a smooth paved road and enter a muddy site. It carries a heavy load across broken ground. Finally, it returns to typical highway or city roads. Mixed Routes Create Multiple Tire Stresses A standard highway TBR tire generally performs well on smooth pavement. However, it might lack the strength needed for sharp stones, unstable ground, and wet soil. It also struggles with heavy load impacts. On & off road TBR tires require a more robust tread pattern. They need a tougher structure to withstand cuts, chipping, and stone trapping. This design also prevents serious shoulder damage. The LANDER SEA ON&OFF tire range is specifically engineered for mixed and rugged terrain. It features patterns tailored for bad roads and overloading trucks. It suits heavy-duty on/off applications perfectly. These tires offer excellent traction and anti-stone protection. They also provide effective heat dissipation, reliable self-cleaning, and strong wear resistance. Construction Fleets Need Stability and Durability Construction trucks typically transport heavy materials. These include sand, stone, cement, steel, soil, bricks, and machinery parts. Such heavy loads put extra stress on the tread, sidewall, bead, and casing. A suitable TBR on & off road tire must help the truck maintain solid traction. At the same time, it needs to resist early damage.   Which Road Conditions Should You Check Before Tire Selection? Before picking a specific tire pattern, buyers need to identify the actual operating route. The exact same tire might not suit every truck. This remains true even if the size is perfectly correct. Paved Road Plus Jobsite Road Certain trucks spend the majority of their time on paved roads. However, they still enter construction sites for loading and unloading tasks. For these specific users, the tire must deliver stable handling and good heat control. It should offer moderate traction without generating excessive road noise. A pattern like LANDER SEA LS168 targets mixed-road and on-off-road truck applications. It offers features that fit buyer needs perfectly. These include a double tread compound, solid wear resistance, and effective heat dissipation. It also provides reliable traction and produces lower noise. Mud, Gravel, and Bad Roads If trucks routinely navigate through mud, loose gravel, and scattered stones, traction becomes crucial. Self-cleaning also grows more important on unpaved roads. Deep grooves and block tread patterns prove very helpful here. They remove mud from the tread efficiently. This helps keep the grip much more consistent. LANDER SEA LS36 is recommended for mixed-road truck applications that require strong self-cleaning and high wear resistance. Its block pattern design stands out as a primary buyer-fit feature. Which Tread Pattern Works Best for Construction Trucks? Tread design directly influences traction, wear behavior, and stone resistance. It also affects noise levels and fuel consumption. Buyers must carefully match the pattern to the specific road type. They should avoid choosing a tire based solely on its appearance. Block Pattern for Grip and Self-Cleaning Block tread patterns are highly effective for muddy roads and busy construction sites. They also work well on loose surfaces. The open groove design assists in releasing mud and gravel. This reduces the risk of a clogged tread. Consequently, it improves grip when a fully loaded truck needs to start, climb, or brake. It also helps when turning on soft ground. Directional Pattern for Handling and Stone Protection Directional tread patterns significantly enhance traction and water evacuation. They prove highly beneficial when trucks require stable control on mixed roads. LANDER SEA LS57 targets truck applications that demand strong traction and responsive handling. It also provides excellent stone-trapping protection. It features a directional tread, stable handling characteristics, and even wear. The anti-stone design adds extra value. Open Shoulder for Rough Service Open shoulder designs assist greatly with traction and heat release during harsh service. They are frequently utilized for drive axles on mixed-service trucks. However, they might generate more road noise compared to standard highway rib patterns. Therefore, buyers must consider the overall route balance carefully. How Should Buyers Compare Load, PR, and Tire Size? A particular tire pattern might appear suitable at first glance. However, the technical specifications must precisely match the vehicle and its typical load. This step is especially vital for B2B buyers, fleet managers, and tire distributors. Load Capacity Comes Before Price Construction trucks frequently run overloaded. They often operate very close to their maximum working capacity. Buyers must verify the load index, ply rating, and inflation pressure. They should also check the rim size and actual axle load before making a tire choice. LANDER SEA product pages consistently remind buyers to verify PR, load index, and rim details. They also emphasize checking tread depth, load limits, and pressure details prior to quotation or final selection. Size Availability Affects Fleet Planning For distributors, comprehensive size coverage is critical. A practical on & off road product line must cover the most common local truck sizes. The LANDER SEA ON&OFF category features multiple models and sizes. For example, LS899 comes in 7.50R16, 8.25R16, and 11.00R20. LS897 is available in 9.00R20, 10.00R20, and 12.00R20. Meanwhile, LS168 offers a much broader range. This includes 700R16, 12.00R24, 11R22.5, 12R22.5, 13R22.5, and 315/80R22.5. What Tire Features Help Reduce Operating Cost? For construction fleets, the total tire cost extends beyond the initial purchase price. The actual cost involves vehicle downtime and early tire removal. It also includes fuel usage, repair expenses, replacement frequency, and ongoing service claims. Cut and Chip Resistance Sharp stones and broken road surfaces frequently cause tread cuts. They lead to block chipping and severe casing damage. A proper on & off road tire must utilize a tough tread compound. It needs a strong pattern structure to manage these rough surfaces effectively. Heat Dissipation Heavy loads, low-speed operation, and repeated braking naturally increase tire temperature. Excessive heat will inevitably shorten the tire’s lifespan. LANDER SEA LS897 is specifically positioned for heavy-duty on and off road truck applications. It includes features like a double compound and high wear resistance. It also offers low heat build-up, solid shoulder protection, and dependable wet driving stability. Shoulder Protection and Even Wear Shoulder wear happens frequently on trucks that turn often on jobsites. It also occurs when they run with unevenly distributed loads. A reinforced shoulder design and correct inflation pressure are essential. They help minimize irregular wear and significantly improve usable mileage. Why Is QINGDAO LANDER-SKY TYRE CO. ,LTD a Reliable TBR Tires Supplier? QINGDAO LANDER-SKY TYRE CO. ,LTD operates as a global tire supplier. It specializes in TBR, OTR, industrial, agricultural, and forklift tires. The company was established in 2013. It presents itself as a dedicated supplier with 5 modern workshops. It maintains strict quality control and offers a solid 3-year warranty. It also ensures fast response times and delivers customer-focused service. For buyers seeking TBR on & off road tires, LANDER SEA provides a dedicated ON&OFF product category. This includes patterns for bad roads, overloading trucks, and mixed-road applications. It offers traction, heat dissipation, and anti-stone protection. It also features excellent self-cleaning performance. The company states that its tires earn trust from partners in more than 60 countries. Furthermore, over 100 long-term customers select Lander for its consistent reliability and steady growth. Conclusion Selecting TBR on & off road tires for construction trucks and mixed routes demands careful thought. It requires much more than just picking a tire size. Buyers must evaluate the specific road conditions and overall load requirements. They need to consider axle position, tread pattern, and cut resistance. Heat control, self-cleaning ability, and shoulder protection are also vital. Finally, they must review all available specifications. For trucks operating between paved roads and rough jobsites, the correct tire makes a huge difference. It can improve traction, reduce costly downtime, and extend service life. This ultimately lowers the total operating cost. QINGDAO LANDER-SKY TYRE CO. ,LTD supplies multiple ON&OFF TBR tire options. These options meet various mixed-route needs perfectly. This makes the company a highly practical supplier for distributors, fleet owners, contractors, and replacement tire buyers. FAQs Q1: What are TBR on & off road tires used for? TBR on & off road tires serve trucks that travel on both paved roads and rough surfaces. These include busy construction sites, gravel roads, and rural routes. They are also used in quarries and muddy jobsite entrances. Q2: Are on & off road tires suitable for long highway driving? They can operate on paved roads safely. However, they are not identical to long-haul highway tires. On & off road tires focus primarily on traction, cut resistance, and rough-road durability. In contrast, long-haul tires focus mainly on fuel economy, low noise, and high-speed mileage. Q3: What should buyers check before ordering TBR on & off road tires? Buyers must check tire size, PR, load index, and rim specifications. They should verify tread depth, load capacity, and inflation pressure. They also need to assess the road condition, axle position, and expected mileage. Finally, they must confirm whether the tread pattern truly fits the truck’s actual operating route.