Duramax Rims: What size wheels will fit on my Chevy 2500?

Duramax Rims: What size wheels will fit on my Chevy 2500?

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Enhancing the Look and Performance of your Duramax: The Dirty Diesel Wheel Sizing Guide


Chevy and GM trucks are known for their exceptional power, towing capabilities, and ruggedness.  While these trucks are undoubtedly impressive directly from the factory nothing improves the look of your Duramax like a lift and wheel upgrade.

Determining which wheel and tires will fit your specific generation of truck is a daunting task already, throw a lift into the mix and you’ve got even more to think about.  In this article we will cover the compatibility of wheels across the generations, and will further discuss crucial factors such as lift height, bolt pattern, offset, and center bore to help you make an informed decision.


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Considerations before Upgrading Wheel Sizes

Wheel Sizing Breakdowns

I. 4th Gen Detroit 6.5L K2500 (1994-1998)

II. 1st Gen Silverado, 2nd Gen Sierra(1999-2007)

III. 2nd Gen Silverado, 3rd Gen Sierra (2008-2013)

IV.3rd Gen Silverado, 4th Gen Sierra (2013-2019)

V. 4th Gen Silverado, 5th Gen Sierra (2019+)

Conclusion

Wheel Sizing Chart


Considerations before Upgrading Wheel Sizes

Chevy Duramax Wheel Size

Before diving into wheel upgrades, it's crucial to consider a few factors:

  1. Fitment: Not all wheel sizes are compatible with every truck. The year, make, and model of your Chevy or GM truck will determine the maximum wheel size it can accommodate without modifications.  With each modification you do add, the tire size will change 

  2. Legal Compliance: Verify the local regulations regarding wheel size modifications to ensure compliance with safety and legal standards.

  3. Usage: Consider your truck's primary usage. If you frequently tow or haul heavy loads, it's essential to choose wheel sizes and tires that can handle the additional weight.

Understanding Fitment and Offset

Fitment refers to how well the wheels fit onto the truck's hub and within the wheel well. The bolt pattern, center bore, and offset are critical factors when selecting new wheels.

  1. Bolt Pattern: Ensure that the new wheels have a bolt pattern that matches your truck's specification. Common bolt patterns for Chevy and GM trucks include 8x6.5 (8x116.7mm) and 8x180 mm.

  2. Center Bore: The center bore of the wheel should match the hub diameter of your truck to ensure a proper fit.

  3. Offset: Wheel offset determines how far the wheel sits in relation to the suspension. Positive offset pushes the wheel further into the wheel well, while negative offset brings the wheel closer to the fender. It's crucial to choose an offset that provides sufficient clearance between the tire and truck components.

Wheel Size Increase: Finding the Right Balance

When upgrading wheel sizes, it's essential to strike a balance between aesthetics and functionality. While larger wheels enhance the truck's appearance, excessively large wheels can negatively impact performance and ride quality. As a general guideline, consider increasing the wheel diameter by one or two inches over the stock size.


Tire Selection and Load Capacity

With larger wheels, you'll need corresponding tires that match the new wheel size and maintain appropriate load capacity. It's crucial to select tires with the correct load rating to ensure they can handle the weight you'll be towing or hauling. Consult the manufacturer's recommendations and seek expert advice when choosing the right tire size and load capacity for your specific application.

See more about tire sizing here


Suspension Upgrades for Optimal Performance:

To maintain the truck's handling and performance after increasing wheel sizes, it may be necessary to consider suspension upgrades. Installing a lift kit or leveling kit can provide the additional clearance needed to accommodate larger wheels and tires while maintaining proper suspension geometry. Upgrading shocks, springs, and other suspension components can also improve ride quality and handling characteristics.

Wheel Sizing Breakdown

I. 4th Gen Detroit 6.5L K2500 (1994-1998)

The 4th Generation Detroit 6.5L K2500 was the last generation manufactured from 1994-1998, to use the Detroit Diesel motor (the predecessor to the Duramax) which was known for its robust performance and durability.

As with other trucks from similar generations, the options on this truck are fairly limited.  The bolt pattern is 8X6.5 with a 78.3mm center bore or a 116.6mm Center Bore on C6P trucks.  The recommended fitment is a 16” to 24” diameter, and a 6.5” to 13” width across the board, from stock height to a 6” lift.  The recommended offset is between -16mm to 35mm with stock ride height to a 4” lift.  If you are going to go with a 6” lift the recommended offset stretches to -54mm to 35mm. 

II. 1st Gen Silverado, 2nd Gen Sierra(1999-2007)

Second Generation GMC on Lift Assessing Wheel Fitment

The second generation GMC Sierra and first generation Chevrolet Silverado offer more sizing options than the previous generation, including increases in potential diameter, width as well as offset.  The recommended diameter is 16” to 26”, recommended width is 6.5” to 14”, and recommended offset is between -91mm to 35mm depending on lift height.

When it comes to tire contact with the truck or rubbing, you can be anywhere along the scale from no rubbing whatsoever to extreme rubbing.  As this is a pretty relative measurement we have broken it down into two categories: No rubbing and rubbing.


No Rubbing

When it comes to tire and wheel fitment for these trucks, you have a range of options that won't lead to rubbing issues. Here's a breakdown of these setups:

Stock Setup 

Stick with a 16" to 22" diameter wheel and 6.5" to 13" width. The recommended offset ranges from -16mm - 28mm with no trimming.  If you are ok with doing some plastic trimming you should stick to -54mm to 35mm.  If you are willing to go even further and trim metal the recommended offset lies between -61mm to 28mm.

Leveling Kit 

With a leveling kit in place, opt for a 16" to 22" diameter wheel and the same width range as above(6.5" to 13").  The recommended offset is -34mm to 28mm if you don’t want to do any trimming. This configuration provides a balanced look without rubbing concerns.
If you want to widen your stance a bit, with some plastic trimming the recommended offset is -54mm to 35mm and with some metal trimming you can go to -61mm to 28mm.


2.5" Lift


With a 2.5” lift to avoid rubbing, you’ll have to stay within the 16" to 22" inch diameter range, and keep your width between 6.5" to 13".  Without any trimming you’ll need to keep a -35mm to 28mm offset.  With some plastic trimming you can increase your offset to -54mm to 35mm, and with some metal trimming you can expand that to a -61mm to 28mm offset.


4" Lift

With a 4” lift, you’ll still need to keep a 16" to 22" diameter, but you can increase you wheel width.  Without any trimming you’ll have to stay in the 6.5" to 13" range, but if you are willing to trim you can bump that up to 14”.  Without any trimming you should stick with a -54mm to 35mm offset.  With some trimming you can increase that number to -86mm to 28mm.


6” Lift

For those looking for something nice and bold with a 6" lift, you can select a wheel diameter between 16" to 24" and a width spanning from 6.5" to 14". The recommended offset for no-rubbing remains at -86mm to 28mm without any trimming.  If you are willing to trim you can increase your offset to -91mm to 28mm.  This setup will allow you to maintain a confident stance while ensuring your tires don't rub against any components.

Setups that Rub

Now, let's explore options that might lead to rubbing issues. If you're willing to accept some tire rub, you can go a bit bigger with these sizes:

Stock Setup 

Stick with a 16" to 22" diameter wheel and 6.5" to 13" width with a -61mm to 28mm offset if you don’t want to do any trimming.  If you are willing to do some trimming you can go with a 16" to 24" diameter wheel and increase the width to 6.5" to 14".  As far as offset, you will want to stick in the -86mm to 28mm range if you are willing to do any trimming up to minor metal.
  

Leveling Kit 

With a leveling kit stick with a 16" to 22" diameter wheel and 6.5" to 13" width with a -61mm to 28mm offset if you don’t want to do any trimming.  If you want to widen your stance a bit, with some plastic trimming, or minor metal trimming, the recommended offset is -86mm to 28mm.  If you are willing to do some major metal trimming, you can increase your offset to -91mm to 28mm.


2.5" Lift

With a 2.5” lift you’ll have to stay within the 16" to 22" inch diameter range, and keep your width between 6.5" to 13".  If you want to widen your stance a bit, with some plastic trimming, or minor metal trimming, the recommended offset is -86mm to 28mm and you can increase your width to 6.5" to 14".  If you are willing to do some major metal trimming, you can increase your offset to -91mm to 28mm.


4" Lift

With a 4” lift you can opt for a 16" to 24" diameter, and a 6.5" to 14" width.  The recommended offset is -86mm to 35mm unless you want to do some