Ford Raptor tyre sizes directly determine your truck’s off-road capability, ground clearance, and overall performance characteristics. Each generation comes with specific tyre dimensions that Ford engineers selected to optimise the balance between highway comfort and extreme terrain capability.
Stock Ford Raptor tyre sizes vary between model years, with significant differences in diameter affecting everything from approach angles to fuel consumption. Understanding these specifications becomes critical when replacing worn tyres or planning performance modifications.
This guide covers every aspect of Raptor tyre sizing, from factory specifications to aftermarket upgrade paths. You’ll find detailed technical information alongside practical advice for selecting the right tyres for your specific driving needs and performance goals.
Table of Contents
Factory Specifications
Ford has equipped each Raptor generation with carefully selected tyre sizes that match the truck’s suspension tuning and intended performance envelope. These factory specifications provide the baseline for understanding upgrade potential and replacement requirements.
First Generation Ford Raptor Tyre Size (2010-2014)
Original Raptors rolled on 315/70R17 BFGoodrich All-Terrain T/A KO tyres measuring approximately 35 inches in diameter. These tyres delivered 12.4 inches of section width with 8.7 inches of sidewall height, providing excellent ground clearance without compromising ride quality.
The 17-inch wheel diameter maximised sidewall protection for off-road use. Load capacity reached 3,195 pounds per tyre at 35 PSI, adequate for the truck’s 7,000-pound gross vehicle weight rating. This sizing established the performance template for future generations.
Sidewall construction emphasised durability over outright performance, with reinforced sidewalls capable of handling reduced air pressures for sand and rock crawling. The aggressive tread pattern provided excellent traction in mud, sand, and loose gravel conditions.
Second Generation Ford Raptor Tyre Size (2017-2020)
Ford retained the proven 315/70R17 sizing for the redesigned 2017 Raptor but upgraded to BFGoodrich All-Terrain T/A KO2 tyres. The improved compound delivered 15% better treadwear compared to the original KO specification while maintaining identical external dimensions.
Enhanced bead construction reduced highway noise and improved high-speed stability. Load capacity remained at 3,195 pounds per tyre, but the revised compound offered better wet weather performance and improved puncture resistance for serious off-road use.
Ford refined the tyre pressure monitoring system for the second generation, with more accurate sensors and improved low-pressure warnings. Recommended inflation pressures remained unchanged, but the system provided better feedback for off-road pressure adjustments.
Third Generation Ford Raptor Tyre Size (2021-Present)
Current standard Raptors maintain the 315/70R17 BFGoodrich All-Terrain T/A KO2 specification, preserving the proven 35-inch diameter formula. However, Ford now offers multiple configurations depending on trim level and intended use.
The tyre compound includes updated silica content for improved wet traction and reduced rolling resistance. Tread depth increased slightly compared to previous generations, providing longer service life and maintaining performance as the tyres wear.
Electronic integration improved significantly, with the tyre pressure monitoring system now providing individual tyre pressure readings and temperature warnings. The system adapts to different pressure settings for on-road and off-road use.
Ford Raptor R Tyre Size Specifications
Raptor R models come equipped with 37-inch BFGoodrich All-Terrain T/A KO2 tyres sized 315/75R17. These larger tyres provide nearly two inches of additional ground clearance compared to standard Raptor models, improving approach and departure angles substantially.
Load capacity increases to 3,750 pounds per tyre with the 37-inch configuration. The enhanced rating accommodates the supercharged engine‘s additional weight and provides a margin for heavy payload or towing applications without exceeding tyre load limits.
Ford recalibrated all electronic systems for the larger tyre diameter. Speedometer accuracy, traction control intervention points, and anti-lock brake system operation all received updates to match the increased rolling circumference and different performance characteristics.
Upgrade Sizing Options
Aftermarket Ford Raptor tyre sizes open up numerous performance enhancement possibilities, from improved traction to increased ground clearance. Understanding available options and their trade-offs helps you select the ideal upgrade path for your specific requirements.
Popular Aftermarket Ford Raptor Tyre Sizes
The 37×12.50R17 size represents the most popular upgrade for standard Raptor models. This sizing matches the Raptor R’s overall diameter while providing a wider 12.5-inch section width compared to the stock 12.4-inch measurement.
Many owners choose 35×12.50R17 sizing to maintain stock overall diameter while gaining additional section width. This configuration provides a wider contact patch for improved traction without affecting speedometer calibration or requiring clearance modifications.
Extreme off-road enthusiasts sometimes select 40-inch tyres sized 40×13.50R17, though this requires suspension modifications and body trimming. Such sizing dramatically alters acceleration, braking, and fuel consumption while providing maximum ground clearance.
Load range upgrades from Standard Load to Load Range E provide improved durability and puncture resistance. The stiffer sidewall construction better supports heavy loads but reduces ride comfort on rough surfaces.
All-Terrain Upgrade Options
Falken Wildpeak A/T3W tyres offer superior snow and ice performance with a 3PMSF rating while maintaining off-road capability. The compound formulation provides excellent grip in winter conditions without sacrificing warm-weather performance.
General Grabber ATX tyres feature more aggressive tread patterns for enhanced mud and rock performance. Stone ejector ribs in the sidewall design help prevent punctures and damage during technical rock crawling sessions.
Cooper Discoverer AT3 4S tyres emphasise on-road comfort and longevity while maintaining respectable off-road capability. The asymmetric tread design reduces road noise significantly compared to more aggressive patterns.
Mud-Terrain Performance Options
BFGoodrich Mud-Terrain T/A KM3 tyres provide maximum off-road traction with aggressive tread blocks and sidewall lugs. The compound formulation resists tearing and chunking under extreme use but sacrifices on-road refinement.
Nitto Ridge Grappler tyres bridge all-terrain and mud-terrain performance with a hybrid tread design. The centre blocks provide highway comfort while shoulder lugs deliver aggressive off-road bite in challenging conditions.
Toyo Open Country M/T tyres feature deep tread depths and large void ratios for self-cleaning in muddy conditions. Hook-shaped sidewall blocks provide additional traction when airing down for sand or mud driving.
Highway-Focused Alternatives
Michelin Defender LTX M/S tyres prioritise longevity and fuel economy while providing light off-road capability. MaxTouch Construction technology optimises contact pressure for extended tread life and reduced rolling resistance.
Continental TerrainContact A/T tyres deliver excellent wet weather performance with reduced road noise. The silica-enhanced compound provides improved grip in various weather conditions while maintaining reasonable off-road traction.
Bridgestone Dueler A/T Revo 3 tyres focus on highway comfort while maintaining traction on gravel roads and light trails. Spiral wrap construction reduces road noise and improves ride quality for daily driving applications.
Performance Impact Analysis
Ford Raptor tyre size changes affect multiple vehicle systems and performance characteristics. Understanding these impacts helps you make informed decisions about upgrades and ensures proper vehicle operation after modifications.
Ground Clearance and Approach Angles
Each inch of increased tyre diameter provides approximately 0.5 inches of additional ground clearance at the axle centerline. Moving from 35-inch to 37-inch tyres improves clearance by roughly one inch, significantly benefiting rock crawling and obstacle negotiation.
Approach angles improve directly with increased tyre diameter, allowing more aggressive terrain entry without contacting the front bumper. The Raptor’s approach angle increases from 30.2 degrees to 33.1 degrees when moving from 35-inch to 37-inch tyres.
Departure angles similarly benefit from larger tyres, improving from 23.0 degrees to 24.9 degrees with the larger diameter. This improvement reduces the risk of rear bumper contact when cresting obstacles or climbing steep inclines.
Breakover angles also improve with larger tyres, reducing high-centring risk on sharp-crested obstacles. The additional clearance proves particularly valuable for technical trail riding and competitive off-road events.
Acceleration and Drivetrain Effects
Larger Ford Raptor tyre sizes effectively change the final drive ratio, reducing wheel torque and acceleration performance. Each 10% increase in tyre diameter typically results in approximately a 10% reduction in acceleration capability.
Increased rotational mass requires more energy to accelerate, compounding the gear ratio effects. This becomes particularly noticeable during aggressive driving or when carrying heavy loads that already stress the drivetrain.
Electronic stability control and traction control systems may require recalibration for significant tyre size changes. Modern Raptors include adaptive capability, but extreme size changes can overwhelm the system’s adjustment range.
All-wheel-drive components experience different stresses with larger tyres due to changed leverage ratios and increased unsprung weight. While the system can handle moderate-sized increases, extreme sizing may accelerate component wear.
Fuel Economy Considerations
Ford Raptor tyre size increases affect fuel consumption through multiple mechanisms. Larger tyres create more rolling resistance due to greater contact patch deformation and typically heavier construction materials.
Aerodynamic drag increases proportionally with tyre diameter as more tyre area is exposed to airflow. This effect becomes more pronounced at motorway speeds where aerodynamic losses dominate fuel consumption calculations.
Tread pattern aggressiveness significantly impacts fuel economy, with mud-terrain patterns consuming 10-15% more fuel than highway-oriented designs. The additional rolling resistance and noise-generating tread elements create constant drag.
Weight increases from larger tyres and wheels compound fuel economy losses. Each additional pound of unsprung weight affects fuel consumption more than static weight due to the energy required for acceleration and deceleration.
Ride Quality and Handling Changes
Sidewall height directly affects ride comfort and impact absorption. The stock 17-inch wheel diameter maximises sidewall height for optimal compliance over rough terrain and highway expansion joints.
Tread pattern design influences road noise levels, with more aggressive patterns generating additional harmonic frequencies during rolling. Block sizes, void ratios, and siping all contribute to the acoustic signature.
Tyre pressure requirements change with size increases due to altered load distribution and sidewall stress patterns. Larger tyres often require different pressure settings to achieve optimal performance and wear characteristics.
Steering response changes with different tyre sizes due to altered contact patch characteristics and sidewall stiffness. Wider tyres generally provide more precise steering but may increase the effort required for parking manoeuvres.
Choosing Raptor Tyres
Selecting the optimal Ford Raptor tyre size requires careful analysis of your driving patterns, performance priorities, and practical constraints. This systematic approach helps navigate the numerous options and trade-offs involved in tyre selection.
Driving Pattern Assessment
Daily commuters benefit most from tyres emphasising comfort, longevity, and fuel economy rather than maximum off-road capability. Highway-oriented all-terrain tyres provide the best balance for predominantly road use while maintaining emergency off-road capability.
Weekend trail riders need tyres that perform adequately on motorways while excelling in dirt, sand, and moderate rock conditions. Standard all-terrain tyres typically provide an optimal compromise between on-road manners and off-road performance.
Serious off-road competitors or extreme terrain enthusiasts may justify mud-terrain tyres despite their on-road compromises. These applications prioritise maximum traction over comfort, noise, and longevity considerations.
Commercial users or those regularly towing heavy loads should prioritise load capacity and durability. Load Range E tyres often prove beneficial despite increased weight and reduced ride comfort.
Budget Planning Considerations
Ford Raptor tyre sizes directly affect replacement costs, with 37-inch tyres typically costing 50-100% more than 35-inch options. Factor complete replacement costs into ownership calculations rather than focusing solely on initial purchase price.
Aggressive tread patterns wear faster on pavement, particularly during hard acceleration or braking. Consider expected mileage and driving style when evaluating options with different treadwear ratings and compound formulations.
Installation complexity increases with larger tyres due to balancing requirements and potential clearance modifications. Some extreme sizes require professional installation, suspension adjustments, or body trimming for proper fitment.
Warranty coverage varies significantly between manufacturers and depends on intended use patterns. Off-road damage typically isn’t covered, so consider actual use patterns when evaluating warranty value.
Performance Priority Matrix
Maximum off-road performance demands aggressive tread patterns, reinforced sidewalls, and sizing optimised for ground clearance. Accept significant compromises in on-road refinement, noise levels, and fuel economy for these benefits.
Balanced performance suits most Raptor owners, calling for all-terrain tyres in appropriate sizes that provide reasonable off-road capability while maintaining acceptable highway manners and fuel consumption.
On-road optimisation prioritises comfort, low noise levels, and fuel economy over maximum off-road capability. Highway-terrain or mild all-terrain options work best when off-road use remains minimal.
Specific environmental conditions like snow, sand, or mud may require specialised compounds or patterns. Consider local terrain and seasonal conditions when selecting tread characteristics and sizing.
Technical Compatibility Requirements
Wheel compatibility limits available Ford Raptor tyre sizes, with 17-inch wheels accommodating most dimensions, while larger wheels restrict sidewall height and reduce off-road compliance.
Suspension clearance defines the maximum tyre diameter and width before modifications become necessary. Check clearance at full compression, full extension, and maximum steering lock before finalising size selections.
Electronic system compatibility affects speedometer accuracy, traction control operation, and stability management. Significant size changes may require professional recalibration for proper system operation and legal compliance.
Legal requirements regarding maximum tyre size, tread depth minimums, and load capacity requirements vary by jurisdiction. Verify local regulations before implementing extreme sizing changes that might affect road legality.
Tyre Maintenance Guide
Proper maintenance maximises Ford Raptor tyre performance, safety, and service life regardless of size or type selected. These specific procedures address the unique demands placed on Raptor tyres during both on-road and off-road use.
Pressure Management Protocols
Check tyre pressures weekly using an accurate digital gauge, as temperature changes and small leaks cause significant pressure variations in large-volume tyres. Maintain manufacturer-recommended pressures for road use to prevent irregular wear and handling issues.
Off-road applications often benefit from reduced pressures to increase contact patch area and improve traction. Sand driving typically uses 15-20 PSI, while rock crawling uses 20-25 PSI for sidewall protection against sharp edges.
Return to highway pressures immediately after off-road use to prevent sidewall damage and heat buildup. Underinflated tyres generate excessive heat at road speeds and can suffer catastrophic failure without warning.
Temperature compensation becomes critical with large tyre volumes, as thermal expansion can increase pressures by 4-6 PSI from morning to afternoon temperatures. Check pressures when tyres are cool for accurate readings.
Rotation and Wear Monitoring
Rotate Ford Raptor tyres every 5,000-8,000 miles to equalise wear patterns across all positions. Aggressive off-road use may require more frequent rotation, while highway-only use can extend intervals slightly.
Directional tread patterns limit rotation to front-to-rear movements only, while non-directional patterns allow full cross-rotation for maximum wear equalisation. Check tread pattern specifications before rotating.
All-wheel-drive systems require careful attention to tyre diameter matching between front and rear axles. Replace tyres in axle sets to a minimum to prevent drivetrain damage from diameter mismatches.
Include spare tyres in rotation schedules when practical to maintain five equally-worn tyres. However, different sizes, brands, or tread patterns should not participate in regular rotation cycles.
Inspection and Damage Assessment
Perform weekly visual inspections, checking for embedded objects, cuts, bulges, or unusual wear patterns. Address issues immediately to prevent minor problems from becoming major failures or safety hazards.
Measure tread depth monthly using proper gauges rather than relying on wear bars alone. All-terrain and mud-terrain tyres may require replacement before reaching 2/32 inch depth to maintain adequate off-road performance.
Sidewall condition requires particular attention on off-road tyres due to exposure to sharp rocks and debris. Small cuts may be professionally repairable, but deep damage typically requires immediate replacement.
Wheel condition directly affects tyre performance and longevity. Inspect for bent or cracked wheels after off-road excursions, and address damage promptly to prevent tyre mounting problems and air leaks.
Storage and Seasonal Considerations
Seasonal tyre storage requires proper preparation to prevent damage during extended periods. Clean tyres thoroughly and store them in cool, dry locations away from direct sunlight, ozone sources, and petroleum products.
Maintain slightly elevated inflation pressures during storage to compensate for natural air loss over time. However, avoid overinflation that might stress tyre components during temperature fluctuations.
Rotate stored tyres monthly when possible to prevent flat-spotting and internal component settling. Alternatively, store tyres flat rather than upright to distribute weight more evenly.
Chemical exposure during storage can permanently damage rubber compounds. Keep tyres away from cleaning solvents, petroleum products, and ozone-generating equipment like electric motors or welding equipment.
Conclusion
Ford Raptor tyre size selection significantly impacts your truck’s capability, efficiency, and character. Whether maintaining factory specifications or upgrading for enhanced performance, understanding the technical relationships between size, performance, and application helps you make decisions that optimise your Raptor’s potential while meeting your specific driving requirements and maintaining reliability.
Frequently Asked Questions
Can I install 37-inch tyres on a standard Raptor without modifications?
Standard Raptors accommodate 37-inch tyres with minimal modifications. Expect some rubbing at full steering lock or suspension compression that may require minor trimming. The suspension and drivetrain handle the additional size without major component changes.
What Ford Raptor tyre pressure should I use for off-road driving?
Off-road tyre pressures range from 15-25 PSI depending on terrain type and load. Sand requires lower pressures (15-20 PSI) for flotation, while rock crawling uses higher pressures (20-25 PSI) for sidewall protection. Always return to road pressures for highway use.
Do aftermarket Ford Raptor tyre sizes void my warranty?
Tyre size changes alone rarely void warranties, but damage caused by improper sizing might not receive coverage. Document proper installation and maintenance practices for warranty protection. Dealers may question claims if they believe size changes contributed to failures.
How often should I rotate my Ford Raptor tyres?
Rotate tyres every 5,000-8,000 miles for optimal wear distribution. Heavy off-road use may require more frequent rotation, while highway-only driving can extend intervals. Monitor wear patterns and adjust rotation frequency accordingly.
What load range should I choose for my Ford Raptor tyre size?
Standard Load tyres work for most applications, while Load Range C or E tyres benefit heavy towing or commercial use. Higher load ranges increase weight and reduce ride comfort but improve durability and load capacity for demanding applications.