What size wheels will fit on my Cummins?

What size wheels will fit on my Cummins?

When it comes to upgrading your Dodge or Ram Cummins truck, one of the most popular modifications is changing the wheels and tires. However, determining which wheels and tires will fit your specific generation of truck can be a daunting task. In this blog post, we will delve into the compatibility of wheels across various generations of Dodge/Ram Cummins trucks. We will also discuss crucial factors such as lift height, bolt pattern, offset, and center bore to help you make an informed decision.

Quick Links

I. First Generation (1989-1993)
II. Second Generation (1994-2002)
III. Third Generation (2003-2009)
IV. Fourth Generation (2010-2018)
V. Fifth Generation (2019-Present)

Key Factors to Consider
Wheel Sizing Chart


I. First Generation (1989-1993)

First Gen Dodge W250 Cummins Wheel Rim Sizing

The first-generation Dodge/Ram Cummins trucks feature a simpler design and limited wheel options compared to later generations. The primary wheel size for these trucks is 16x6.5 inches, with a 8x6.5-inch bolt pattern, 0mm offset, and a center bore of 126.15mm.


II. Second Generation (1994-2002)

2nd Generation Dodge Ram Cummins Wheel Sizing

With the introduction of the second-generation Dodge/Ram Cummins trucks, more wheel options became available. The most common wheel sizes for this generation include 16x7 inches and 17x8 inches. The bolt pattern remains 8x6.5 inches, while the offset ranges from -12mm to +20mm. The center bore remains consistent at 126.15mm.

Stock Setup

For a stock height truck, the largest tire size that will clear without rubbing at full suspension compression during turns is 285/70/17. If you're looking for more significant tires, 35"x12.5" can work, but you'll need aftermarket high clearance control arms to eliminate any rubbing that may occur at full steering lock.


3" Lift Level and 3" Kits

With a 3" level or suspension system, you can accommodate 35"x12.5" tires. Opt for wheels with 0-12mm offset and 4.5"-4.75" backspace, ideally 8"-9" wide. If you prefer a more flush fit, consider wheels with a +18 to +25 offset. When using stock arms, minor plastic liner trimming is necessary. However, if you have aftermarket arms, little to no trimming is required.

If you have your sights set on 37"x12.5" tires, aftermarket control arms are essential. To run 37" tires, you'll need wheels with 0mm offset and 4.75" backspacing. Alternatively, you can use +18mm offset wheels with 5.75" backspacing, but note that they may rub against most aftermarket control arms at full lock. Regardless of the wheel or control arm chosen, fender trimming is necessary. To ensure clearance at full suspension travel while turning, the front fender needs to be carefully cut, a section removed, and then re-welded.


III. Third Generation (2003-2009)

3rd Gen Docdge Ram Cummins Wheels Rim Sizing

The third-generation Dodge/Ram Cummins trucks exhibit a more modern design and expanded wheel choices. The prevalent wheel sizes for this generation include 17x8 inches, 18x8 inches, and 20x8 inches. The bolt pattern remains 8x6.5 inches, but the offset ranges from -12mm to +20mm. The center bore remains unchanged at 126.15mm.

Stock Setup

On a stock height third-generation Ram truck, you can run 35"x12.5" tires on the stock wheels, although there may be slight rubbing. Tires with prominent side lugs, likeToyo MT's, might rub against the control arms at full steering lock and require additional trimming of the plastic fender liner.

Aftermarket wheels, that are 8-9" wide with +6 to +25mm offset or 5"-5.75" backspace, can accommodate a 35" tire with minimal trimming of the plastic fender liner. This setup improves arm clearance compared to the stock wheels but may cause increased contact with the body due to the outward positioning of the tires in comparison with the stock wheels. If you opt for aggressive mud terrain tires, additional plastic liner and fender trimming might be necessary.

Wheels with 0 and -12 offset and 4.5"-5" inches of backspacing can fit a 305/70 or metric 34" tire without rubbing. However, for true 35" tires, a bit more trimming of the plastic fender liner is required.


2-3" Lift Level and 3" Kits

When using stock wheels, you can fit 35"x12.5" tires with minor rubbing against the control arms at full steering lock. Tires with larger side lugs may make contact with the control arms in this setup. By installing high clearance control arms, you can eliminate the need for trimming. If you desire, it's possible to run 37"x12.5" tires on stock wheels, provided that high clearance control arms are used to center the axle and allow for tire clearance at full steering lock. With the same setup, 37"x13.5" tires are also feasible, but moderate trimming of the plastic fender liner and cab pinch weld is necessary.

For optimal fitment of the largest tires on a third-gen Ram, consider +18 offset wheels with 5.75" backspace. With factory control arms, 35"x12.5" tires can fit with minimal trimming of the plastic and pinch weld. We highly recommend using high clearance control arms to center the axle, allowing for full lock-to-lock turning without contact at the arms. With high clearance control arms, 37"x12.5" tires will fit with minimal fender plastic trimming, and 13.5" wide tires will fit with some pinch weld trimming.

For the most room possible on this platform, choose 18 offset wheels and high clearance control arms. High clearance arms are a necessity to avoid control arm rub at steering lock. Aftermarket control arms are necessary to avoid control arm rub at steering lock and help center the axle after the 3" lift, providing more clearance at the pinch weld and cab corner. With aftermarket arms, 37"x13.5" tires will fit with moderate trimming of the fender liner plastic and cab pinch weld.

Wheels with 0mm/-12mm offset, 8"-9" wide, and approximately 4.5" backspacing can accommodate a 37"x12.5" tire with moderate pinch weld and plastic liner trimming. Again, high clearance aftermarket control arms are recommended when using 37" tires.

When using -24 offset wheels ranging from 10"-12" wide, you can generally run 35’s with minimal trimming on a 10" wide wheel or with moderate trimming on a 12" wide wheel. To fit a 33" tire without significant rubbing, anything with more than -24 offset is required. For larger tires, longer control arms are recommended to center the axle after the lift and provide

6” lift kits

Tire options are limited with stock wheels.  This is due to lifts exceeding 3” requiring long, or radius arms  (Both have less inner tire clearance and factory wheels have a lot of backspacing). Anything larger than a 35"x12.5" tire will cause rubbing on the control arms at full steering lock.

Wheels that have a 0mm/-12mm offset or 4.5”-4.75” backspace and a width ranging from 8.5” to 10” can accommodate a 37”x13.5” tire with minimal trimming. Even a 10” wide wheel will only require minimal trimming. These offset and backspace specifications are optimal for fitting the largest tire while maintaining proper clearance for the cab corner, fender liner, and control arms.

12” or 14” wide wheels usually need a 35” tire. If you aim to fit 37” tires on wheels of this width, you'll need an 8” lift, accept reduced turning ability, or undertake extensive trimming.


IV. Fourth Generation (2010-2018)

4th Gen Dodge Ram Cummins Wheel Sizing

    With the fourth-generation Dodge/Ram Cummins trucks, there is a wider range of wheel sizes and styles available. Common wheel sizes include 17x8 inches, 18x8 inches, 20x8 inches, and 22x9 inches. The bolt pattern remains 8x6.5 inches, and the offset ranges from -12mm to +20mm. The center bore remains at 126.15mm.


    2010-2012 4th gen Ram 2500/3500

    The 2010-2012 Ram trucks have a very similar frame and suspension to the 2003-2009 third generation trucks. Because of this, the choices for wheel and tire fitment are almost the same for both models.


    Stock

    On a stock height third-generation Ram, you can run 305 metric tires with some slight trimming of the plastic liner. If you opt for tires with large side lugs like Toyo MT's, they will rub on the arms at full lock, requiring additional trimming of the plastic fender liner.

    For aftermarket wheels, 8-9" wide with +12-22mm offset or 5”-5.75” backspace, you can fit a 35” tire with very minimal trimming. This setup provides better clearance for the arms compared to stock wheels, but keep in mind that it moves the tire outward. At stock height, you can accommodate a true 35" tire with minimal trimming of the plastic fender liner.

    If you choose wheels with 0 and -12 offset and 4.5”-5” inches of backspacing, they can accommodate a 295 tire without any rubbing after slight trimming of the plastic. However, for true 35” tires, you will need to trim the plastic fender liner more extensively.


    2-3" Lift Level and 3" Kits:

    Stock wheels can accommodate 35”x12.5” tires with minor rubbing on the control arms at full steering lock. However, tires with large side lugs will make contact with the control arms at full steering lock. With high clearance control arms, no trimming is required. If you prefer, you can run 37”x12.5” tires on the stock wheels, but it's essential to use high clearance control arms to center the axle and ensure tire clearance at full steering lock. With moderate trimming of the plastic and cab pinch weld, you can also fit 37x13.5 tires on the same setup.

    For optimal tire fitment on a third-generation Ram, consider +12 to +27 offset wheels with 5.75” backspace. With factory control arms, 35”x12.5” tires will fit with minor plastic trimming. If you upgrade to high clearance control arms and a high clearance sway bar, you can fit 37x12.5” tires with minimal fender plastic trimming.

    To maximize available space on the platform, choose 18 offset wheels and pair them with high clearance control arms. High clearance arms are essential to prevent control arm rub at steering lock. Additionally, aftermarket control arms assist in centering the axle after the 3" lift, providing more clearance at the pinch weld and cab corner. With aftermarket arms, moderate trimming of the fender liner plastic and cab pinch weld, you can fit 37”x13.5” tires.

    For wheels with 0mm/-12mm offset that are 8”-9” wide and around 4.5” backspacing, you can fit a 37”x12.5” tire with moderate pinch weld and plastic liner trimming. It's recommended to use high clearance aftermarket control arms with 37” tires.

    When using -24 offset wheels that are 10”-12” wide, minimal trimming is generally sufficient for running 35” tires on a 10” wide wheel, while moderate trimming may be required for a 12” wide wheel. Any offset greater than -24 will necessitate a 33” tire to fit without substantial rubbing.


    6" Lift Kits:

    With stock wheels, your tire options become limited when using 6" lift kits. This is because lifts over 3" require long arms or radius arms. Either option reduces inner tire clearance, and the factory wheels have significant backspacing. Anything larger than a 35”x12.5” tire will rub on the control arms at full steering lock.

    To accommodate a 37”x13.5” tire with minimal trimming, consider wheels with 0mm/-12mm offset or 4.5”-4.75” backspace that are 8.5”-10” wide. A 10” wide wheel will also require only minimal tr