Choosing the right Ram trucks tire size is essential for safe towing, confident off-roading, and efficient daily driving. The correct diameter, width, and load range help your Ram perform at its best while protecting your investment.
This guide breaks down how Ram tire sizes are determined, how to read the numbers, and how to choose options that match your work, hobbies, and climate.
| Metric | P265/70R17 | P285/70R17 | P275/70R18 | LT265/80R17 |
|---|---|---|---|---|
| Section Width | 265 mm | 285 mm | 275 mm | 265 mm |
| Aspect Ratio | 70% | 70% | 70% | 80% |
| Construction | R | R | R | |
| Wheel Diameter | 17 in | 17 in | 18 in | 17 in |
| Typical Use Case | Daily driving & light towing | Heavy towing & rugged terrain | High clearance & aggressive tread | Maximum load & off-road durability |
How Ram Tire Size Numbers Work
Understanding the code on your Ram’s sidewall helps you compare options quickly and avoid costly mistakes. Each character conveys specific measurements and capabilities.
The first section indicates the section width in millimeters, the aspect ratio shows sidewall height as a percentage, the letter indicates construction type, and the final number is the wheel diameter in inches.
For example, in P265/70R17, the 265 is width, 70 is sidewall height, R means radial construction, and 17 matches your 17-inch wheels.
Tire Size for Daily Driving and Urban Use
When most Ram owners use their trucks around town, they benefit from sizes that prioritize comfort, fuel efficiency, and easy handling.
Sticking with the OEM recommended diameter, such as 265/70R17 or equivalent 275/70R18, preserves the intended ride height and drivetrain calibration.
Narrower tread widths can improve fuel economy and reduce road noise, while staying close to the factory size keeps your Ram’s systems calibrated correctly.
Tire Size for Towing and Hauling
Serious towing and hauling often demand larger, more robust Ram tires that can handle extra weight and stress without overheating.
Options like 285/70R17 or LT265/80R17 provide a wider footprint, stronger sidewalls, and higher load ratings to support heavy trailers and cargo.
Maintaining proper air pressure and verifying your truck’s Gross Combined Weight Rating (GCWR) ensures safe performance when you push the limits.
Tire Size for Off-Road and Adventure
Off-road enthusiasts frequently choose larger-diameter Ram tires to gain more ground clearance and a more aggressive look on trails and dirt roads.
Switching to 275/70R18 or even 33-inch variants can improve articulation and traction, but it may require a lift kit and recalibration of safety systems.
Balancing tread pattern, rubber compound, and sidewall stiffness helps you navigate rocks, mud, and sand without compromising on-road comfort too much.
Choosing the Right Ram Tires for Your Lifestyle
- Confirm your truck’s recommended tire size in the owner’s manual or on the placard inside the driver’s door.
- Match or slightly increase load rating when towing heavy trailers or hauling heavy equipment.
- Choose a diameter that keeps your Ram’s suspension geometry close to stock for optimal handling.
- Consider tire sidewall stiffness and tread pattern to align with your climate and primary driving surfaces.
- Recalibrate speedometers and safety systems after installing significantly larger or smaller tires.
FAQ
Reader questions
Will switching to larger Ram tires affect my vehicle’s computer systems?
Yes, larger tires can change speedometer accuracy, traction control settings, and adaptive cruise behavior. Recalibration or updates often resolve these issues.
Can I mix tire sizes on the same axle on my Ram truck?
It is not recommended. Mixing sizes on an axle can cause drivetrain stress, uneven traction, and potential handling instability under load or in adverse conditions.
What is the best tire size for winter driving with my Ram?
Choose a size that fits your OEM wheels with enough clearance for winter tires, and pair it with quality chains if needed. Maintaining proper pressure is especially critical in cold weather.
Should I prioritize load rating or comfort when selecting Ram tire sizes?
Balance both by selecting a size that offers an appropriate load rating for your typical cargo and towing needs, while also considering rubber compound and tread design for ride quality.