When we’re shopping for new tires or planning modifications for our Ram 1500, understanding the stock tire size becomes crucial for making informed decisions. The factory-installed tires on our beloved pickup trucks aren’t just random selections – they’re carefully engineered to optimize performance, fuel economy, and safety for our exact vehicle configuration.
We’ve all been there: standing in the tire shop wondering if we can upgrade to larger wheels or questioning whether that great deal on used tires will actually fit our truck. Ram 1500 stock tire sizes vary significantly depending on the trim level, model year, and cab configuration we’re driving. From the base Work Truck to the luxurious Limited trim, each variant comes with different wheel and tire combinations that affect everything from our truck’s stance to its towing capacity.
Understanding these specifications helps us make smart choices whether we’re replacing worn tires with OEM sizes or exploring aftermarket options that’ll enhance our Ram’s appearance and performance.
Stock Ram 1500 Tire Size Overview
Ram 1500 trucks come equipped with different tire sizes depending on the exact trim level and configuration. Most base-model Ram 1500 Regular Cab trucks feature 17-inch wheels with 265/70R17 tires as standard equipment. The Crew Cab and Quad Cab configurations typically receive 18-inch wheels paired with 275/65R18 tires from the factory.
Premium trim levels like the Limited and Longhorn editions often include larger wheel and tire combinations. These higher-end models commonly feature 20-inch wheels with 275/60R20 tires as part of their standard equipment package. Sport and Rebel variants may come with specialized tire sizes designed to complement their performance-oriented or off-road capabilities.
| Trim Level | Wheel Size | Standard Tire Size |
|---|---|---|
| Tradesman Regular Cab | 17″ | 265/70R17 |
| Big Horn Crew Cab | 18″ | 275/65R18 |
| Laramie | 18″ | 275/65R18 |
| Limited | 20″ | 275/60R20 |
| Longhorn | 20″ | 275/60R20 |
| Rebel | 18″ | 275/70R18 |
Model year changes can affect stock tire specifications across the Ram 1500 lineup. The 2019 redesign introduced new wheel and tire combinations that differ from previous generations. Current production models maintain consistency in their tire sizing within each trim level while offering optional upgrade packages.
Load rating and speed rating specifications vary among different stock tire sizes. The 265/70R17 tires typically carry a load index of 115 with an S speed rating suitable for highway driving. Larger 275/60R20 tires often feature higher load indices around 116 with T or H speed ratings depending on the exact tire manufacturer and compound.
Tire Sizes by Generation and Trim Level
Ram 1500 tire sizes vary significantly across different generations and trim configurations. Each generation introduces distinct sizing options that reflect evolving performance standards and customer preferences.
2019-2024 Fifth Generation Ram 1500
Fifth generation Ram 1500 models feature tire diameters ranging from 18 to 22 inches across various trim levels. The 275/65R18 size appears on popular trims including Laramie, Tradesman, and Big Horn configurations. Laramie and Limited trims offer 275/55R20 tires, while the Tradesman HFE also uses this specification for enhanced fuel efficiency.
Premium trims like Limited and Limited Longhorn come equipped with 285/45R22 tires that provide a commanding road presence. The Rebel trim uses specialized 275/70R18 tires designed for off-road performance. TRX models feature massive 325/65R18 tires that complement the high-performance nature of this variant.
Classic trim designations including Tradesman and Warlock typically use 265/70R17 or 275/60R20 sizes depending on the exact configuration.
2009-2018 Fourth Generation Ram 1500
Fourth generation Ram 1500 trucks offered tire sizes spanning 16 to 22 inches in diameter. Factory specifications included multiple 16-inch options: 225/75R16, 245/75R16, and 265/75R16 tires mounted on standard rims.
Seventeen-inch configurations featured 225/70R17, 245/70R17, and 265/65R17 tire sizes. Eighteen-inch setups used 265/60R18 tires, while 20-inch wheels came with 275/60R20 specifications.
These sizing options covered both standard and flotation tire categories, with flotation sizes offering slightly larger dimensions for enhanced off-road capability.
Classic and SRT Models
Classic Tradesman and Warlock models maintain distinct tire sizing with 265/70R17 and 275/60R20 specifications respectively. The high-performance TRX variant uses exclusive 325/65R18 tires that support its exceptional power output and handling characteristics.
| Model Category | Common Tire Sizes | Rim Diameter |
|---|---|---|
| Classic Tradesman | 265/70R17 | 17 inches |
| Classic Warlock | 275/60R20 | 20 inches |
| TRX Performance | 325/65R18 | 18 inches |
Modern Ram 1500 models predominantly use 17-inch, 18-inch, 20-inch, and 22-inch rim configurations, with 275/65R18 and 275/55R20 representing the most prevalent sizes across recent model years.
Understanding Ram 1500 Tire Size Numbers
Reading your Ram 1500’s tire specifications correctly ensures you select the right replacement tires for optimal performance and safety. These alphanumeric codes contain essential information about tire dimensions, construction, and performance capabilities.
Reading Tire Size Specifications
Tire size numbers follow a standardized format with distinct components that indicate exact measurements and characteristics. The first number represents the tire width measured in millimeters – for example, in the common 275/65R18 size found on many Ram 1500 models, the 275 indicates a width of 275 millimeters.
Following the width, the second number expresses the sidewall height as a percentage of the tire width. In our 275/65R18 example, the 65 means the sidewall height equals 65% of the 275mm width. This aspect ratio directly affects ride comfort and handling characteristics.
The letter “R” designates radial construction, which describes how the tire’s internal cords run from bead to bead. Radial tires provide better fuel economy and longer tread life compared to bias-ply alternatives.
The final number indicates the rim diameter measured in inches. Ram 1500 trucks commonly use 17-inch, 18-inch, or 20-inch wheels, with premium trims like the Limited featuring 22-inch wheels paired with 285/45R22 tires.
Load Index and Speed Ratings
Load index numbers communicate the maximum weight each tire can support safely when properly inflated. These numerical ratings correspond to exact weight capacities – a load index of 114 supports approximately 2,601 pounds per tire.
Speed ratings use letter codes to indicate the maximum safe operating speed for sustained periods. The “H” rating commonly found on Ram 1500 tires allows speeds up to 130 mph, while “S” ratings limit speeds to 112 mph typically seen on 265/70R17 tires used on Tradesman models.
Combined load and speed ratings like “114H” provide complete performance specifications for your exact driving requirements. Matching or exceeding your original equipment ratings maintains the safety margins engineered into your Ram 1500’s design.
These ratings become particularly important when considering different tire brands or upgrading to performance-oriented options, as maintaining adequate load capacity ensures proper handling and braking performance under various driving conditions.
Performance Impact of Stock Tire Sizes
Stock tire sizes directly influence your Ram 1500’s overall performance characteristics across multiple driving scenarios. Different factory tire configurations affect everything from daily comfort to specialized capabilities like towing and off-road performance.
Ride Quality and Comfort
275/65R18 tires deliver a balanced ride experience with their larger sidewall height providing natural shock absorption. Vehicles equipped with these tires experience smoother impacts from road imperfections and potholes.
285/45R22 tires create a firmer driving experience due to their reduced sidewall flex and increased contact patch. Premium trims featuring these larger diameter wheels sacrifice some comfort for enhanced road feedback and cornering precision.
275/70R18 tires on Rebel models prioritize off-road comfort with aggressive tread patterns that absorb terrain irregularities. These tires maintain composure over rocks and uneven surfaces while providing adequate on-road manners for daily driving.
Sidewall construction plays a crucial role in comfort levels across all stock sizes. Tires with higher sidewall ratios like the 275/65R18 configuration cushion impacts more effectively than low-profile alternatives.
Fuel Economy Considerations
275/55R20 tires optimized for highway use typically deliver the best fuel efficiency among stock options due to their reduced rolling resistance. These tires feature tread compounds designed for minimal energy loss during rotation.
285/45R22 tires on premium trims create increased rolling resistance that can reduce fuel economy by 1-2 MPG compared to smaller alternatives. The larger contact patch and heavier weight contribute to higher energy consumption.
275/70R18 off-road tires generate the highest rolling resistance among stock configurations due to their aggressive tread blocks and deeper patterns. Drivers can expect fuel economy reductions of 2-3 MPG when equipped with these capability-focused tires.
Tire pressure maintenance becomes critical for fuel efficiency across all stock sizes. Properly inflated tires reduce rolling resistance and maintain optimal contact patterns for maximum efficiency.
Towing and Payload Capacity
Stock tire sizes don’t alter the Ram 1500’s official towing ratings of up to 12,750 pounds or payload capacity of up to 2,300 pounds. These specifications remain constant regardless of factory tire configuration.
Load index ratings vary across stock tire sizes with larger configurations typically featuring higher weight capacities. The 285/45R22 tires often carry load indices of 118-121 compared to 115-117 ratings on smaller alternatives.
Speed ratings become crucial during towing operations when stock tires experience increased stress and heat buildup. Most Ram 1500 stock configurations feature S or T speed ratings adequate for normal towing conditions.
Proper tire inflation becomes essential when approaching maximum towing or payload limits. Stock tire pressure recommendations increase by 5-10 PSI when carrying heavy loads to maintain structural integrity and heat dissipation.
Popular Aftermarket Tire Size Upgrades
Ram 1500 owners commonly upgrade from stock tires to enhance performance and appearance. These modifications typically involve plus-sizing or switching tire types based on driving preferences.
Plus-Sizing Options
Plus-sizing increases wheel diameter while maintaining approximately the same overall tire diameter for improved handling and aesthetics. A Plus One upgrade transforms the stock 265/60R18 configuration to 275/50R20, providing better cornering response without significantly altering the speedometer reading. Plus Two upgrades offer more dramatic visual impact by moving from 265/60R18 to 295/45R22, creating a lower profile sidewall that enhances steering precision.
Popular Plus-Sizing Combinations:
| Stock Size | Plus One | Plus Two |
|---|---|---|
| 265/60R18 | 275/50R20 | 295/45R22 |
| 275/65R18 | 285/55R20 | 305/40R22 |
| 275/60R20 | 295/50R22 | 315/35R24 |
Wheel diameter increases from 17 inches to 20 inches or 22 inches require compatible suspension clearance verification. Tire profile adjustments maintain proper overall diameter to prevent interference with wheel wells or suspension components.
All-Terrain vs Highway Tires
All-terrain tires excel in diverse driving conditions by combining on-road comfort with off-road capability. These tires feature aggressive tread patterns that provide superior traction on gravel, mud, and loose surfaces while maintaining acceptable highway performance. Highway tires prioritize smooth, quiet operation on paved roads with optimized tread compounds that deliver better fuel efficiency and extended tread life.
Performance Comparison:
| Tire Type | Fuel Economy | Road Noise | Off-Road Traction | Tread Life |
|---|---|---|---|---|
| All-Terrain | Moderate | Higher | Excellent | 50,000-60,000 miles |
| Highway | Superior | Lower | Limited | 60,000-80,000 miles |
All-terrain options like 275/70R18 reduce fuel efficiency compared to highway-focused 275/55R20 tires but offer versatility for recreational driving. Highway tires provide quieter cabin environments and smoother ride quality on daily commutes.
Choosing the Right Replacement Tires
Selecting replacement tires for your Ram 1500 requires matching OEM specifications for load capacity, speed rating, and size to maintain safety and performance standards. We recommend checking your vehicle’s door jamb sticker or owner’s manual for the exact tire size specifications before making any purchase decisions.
OEM vs Aftermarket Options
Original Equipment Manufacturer (OEM) tires offer precise compatibility with your Ram 1500’s factory specifications and maintain the reliability standards established during vehicle design. These tires provide predictable performance characteristics that align with the truck’s engineered capabilities and safety systems.
Aftermarket tires expand your selection beyond factory options, offering diverse brands, tread patterns, and price points to match exact driving preferences. Performance enthusiasts can find specialized compounds for enhanced grip, while budget-conscious owners can select cost-effective alternatives that meet required specifications.
Quality aftermarket options often deliver superior off-road traction or winter performance compared to standard OEM tires, particularly for drivers who frequently encounter challenging terrain or severe weather conditions. We emphasize that any aftermarket tire must still meet the load index and speed rating requirements specified for your particular Ram 1500 trim level.
Installation of different tire sizes may require speedometer recalibration and could potentially affect vehicle warranties or advanced safety systems like electronic stability control. Consulting with a tire professional ensures compatibility with your truck’s exact requirements and avoids potential complications.
Seasonal Tire Considerations
Winter tires deliver superior traction in snow and ice conditions through specialized rubber compounds that remain flexible in freezing temperatures. These tires feature aggressive tread patterns designed to bite into slippery surfaces, significantly improving stopping distances and cornering stability during cold weather driving.
All-terrain tires provide versatility for drivers who encounter varying road surfaces throughout the year, from highway pavement to gravel trails and light off-road conditions. Popular sizes like 275/65R18 and 275/55R20 are readily available in all-terrain configurations that maintain the Ram 1500’s load carrying capacity.
Verification of seasonal tire availability in your exact Ram 1500 size ensures compatibility before making seasonal changeovers. Current generation models with 285/45R22 tires may have limited seasonal options compared to more common sizes like 275/65R18.
Seasonal tire selection must maintain the same load rating as your OEM tires to preserve the truck’s payload and towing capabilities. We recommend storing off-season tires in a cool, dry location away from direct sunlight to maximize their lifespan and performance characteristics.
Conclusion
We’ve covered everything you need to know about Ram 1500 stock tire sizes to make informed decisions for your truck. Whether you’re sticking with OEM specifications or exploring aftermarket upgrades understanding these fundamentals ensures optimal performance and safety.
Remember that your exact trim level and model year determine the exact tire size your Ram 1500 requires. From the base 265/70R17 configuration to premium 285/45R22 setups each size serves a exact purpose in balancing comfort fuel economy and capability.
When it’s time for replacement always verify your truck’s exact specifications and consider how different tire choices will impact your driving experience. The right tires keep your Ram 1500 performing at its best for years to come.
Frequently Asked Questions
What is the stock tire size for a Ram 1500?
Stock tire sizes vary by trim level and configuration. Base Regular Cab models typically use 265/70R17 tires, while Crew Cab and Quad Cab versions commonly feature 275/65R18 tires. Premium trims like Limited and Longhorn often come with larger 275/60R20 tires. Sport and Rebel variants may have specialized sizes for enhanced performance or off-road capabilities.
How do I read Ram 1500 tire size specifications?
Tire specifications use alphanumeric codes indicating dimensions and capabilities. For example, in 275/65R18: 275 is the width in millimeters, 65 is the sidewall height as a percentage of width, R indicates radial construction, and 18 is the rim diameter in inches. Additional codes show load index and speed rating for maximum weight capacity and safe operating speed.
Can I upgrade to larger tires on my Ram 1500?
Yes, you can upgrade using plus-sizing, which increases wheel diameter while maintaining overall tire diameter. Popular upgrades include moving from 18-inch to 20-inch wheels. However, verify suspension clearance compatibility and ensure the new tires meet or exceed OEM load and speed ratings to maintain safety and performance standards.
What’s the difference between all-terrain and highway tires for Ram 1500?
Highway tires prioritize fuel economy, quiet operation, and extended tread life for daily commuting. All-terrain tires offer better off-road traction and versatility for recreational driving but typically reduce fuel efficiency and increase road noise. Choose based on your primary driving conditions and performance priorities.
Do different tire sizes affect Ram 1500 towing capacity?
Stock tire sizes don’t alter the Ram 1500’s official towing and payload capacities. However, load and speed ratings are crucial during towing operations. Maintain proper tire pressure when approaching maximum limits, and ensure any replacement tires meet or exceed OEM load ratings to preserve towing capabilities and safety.
Should I match OEM tire specifications when replacing tires?
Yes, matching OEM specifications for load capacity, speed rating, and size maintains safety and performance standards. Check your vehicle’s door jamb sticker or owner’s manual for exact specifications. While aftermarket options provide wider selection, they must still meet required specifications to ensure compatibility and reliability.
How do tire sizes differ between Ram 1500 generations?
The fifth generation (2019-2024) features tire diameters from 18 to 22 inches, with Laramie and Tradesman using 275/65R18, while Limited uses 285/45R22. The fourth generation (2009-2018) offered 16 to 22-inch sizes. The high-performance TRX variant uses exclusive 325/65R18 tires for superior performance capabilities.
What tire considerations are important for seasonal driving?
Winter tires provide enhanced traction in snow and ice conditions, while all-terrain tires offer year-round versatility. When switching seasonal tires, maintain the same load rating as OEM tires to preserve towing and payload capabilities. Proper storage of off-season tires maximizes their lifespan and performance when reinstalled.