Biggest Tires On A Stock Chevy Colorado: PERFECT FIT
The Biggest tires on a stock Chevy Colorado (with stock suspension and rims) are 265\65\17s. They fit without rubbing and do not require additional modifications.
For info on the largest tires for your stock Chev Colorado, you’re in the right spot.
Tire upgrades are a popular and swift way to enhance off-road trucks for better traction and an aggressive appearance.
Below are additional tire sizes that can fit but are slightly larger and require modding.
| Vehicle | Suspension | Rims | Largest Tires | Stock Sizes |
|---|---|---|---|---|
| Chevy Colorado | Stock | Stock | 265\65\17s | 265/65/17, 265/60/18, 255/55/20 |
Additional tire sizes that fit with minimal rubbing and some slight modifications to make work 100% are 265/70/17, 255/70/17, and 255/75/17.
These sizes equate to roughly 5% bigger in diameter and 4% wider.
The sidewalls are up to 15.4 % taller when comparing a 55/75/17 to the stock tire of 255/65/17 or 30.1” compared to 32.1”
Additional tire sizes that fit with minimal rubbing and some slight modifications to make work 100% are 265/70/17, 255/70/17, and 255/75/17
So now that we know what the biggest tire is you can fit without a leveling kit and aftermarket rims, let’s look closer into what it’s like to live with these upgraded tires.
Also, let’s see what owners have said who have successfully made the jump to a bigger tire.
What About Your Chevy Colorado Spare Wheel?
Consider the 285/70/17 or 33-inch as the biggest tires for an upgraded suspension on your Chevy Colorado.
Regarding the 265/70/17, it won’t affect your speedometer or ride quality.
The UCA clearance is minimal but will suffice.
Upgrading to the biggest tire often impacts ride, fuel efficiency, and wheel torque.
However, with just a 5% diameter and a 4% width increase, the 265/70/17 maintains ride comfort.
Chevy Colorado owners report improved grip and handling, and feeling more confident and comfortable.
Then There’s Your Speedometer Reading.
The below table will give you an indication of how the speedometer reading is affected.
| Speedometer reading | 20mph | 30mph | 40mph | 50mph | 60mph | 70mph | 80mph | 90mph |
| Actual Speed | 21 | 31.5 | 42 | 52.5 | 63 | 73.5 | 84 | 94.5 |
Below are the actual differences between the stock tire and the upgraded 265/70/17
| Measurement | Stock Tire (255/65/17) | Upgrade (265/70/17) | Differences |
| Diameter | 30.1” | 31.6” | +5% |
| Width | 10” | 10.4” | +4% |
| Sidewall | 6.5” | 7.3” | +12.3% |
| Circumference | 94.4” | 99.2” | +5% |
| REvz/Mile | 671 | 638 | -33 |
Biggest Tires On A Stock Chevy Colorado – With A Small 2-3” Lift Kit
This is the biggest tire recommended option if you are planning on using the vehicle for off-road use or Overlanding applications.
You will achieve the best off-road capability, ride comfort, as well as load-carrying ability with this option.
Load-carrying ability is of vital importance when doing Overlanding since you are carrying gear, storage, fuel, water, shade, rooftop tents, recovery gear, and more.
With this suspension package, you can fit any of the below tire sizes on your stock rims:
| Tire Size | Size in Inches |
|---|---|
| 265/75/16 | 31.6″ |
| 265/65/17 | 30.6″ |
| 265/70/17 | 31.6″ |
| 255/75/17 | 32.1″ |
| 275/70/17 | 32.2″ |
| 285/70/17 | 32.7″ |
To fit 33-inch tires, trim fenders and adjust backspacing on stock rims.
Add wheel spacers or opt for rims with a more negative offset.
How Do 33” Tires Affect The Colorado’s Fuel Economy?
Bigger, heavier tires impact fuel economy as they add unsprung weight.
Consider the decreased MPG before upgrading to the biggest tires possible.
The heavier wheels affect torque and strain drivetrain components, especially beyond 33″. Re-gearing diffs may be necessary.
What do Chevy Colorado Owners say?
I just had ko2s put on my z71 Colorado couple days ago (265/70/17) and get zero rub of any sort.
Stock everything too. 275 I bet would cause some issues from what I’ve been reading.
https://www.coloradofans.com/threads/biggest-tire-size-w-o-lift.215057/page-5
I just moved to a 265/70/17 tire with the 1.25″ level kit and had bad rubbing.
After adding a 1.5″ lift I am finally clear with little room to spare.
Is the difference causing this my 0 offset wheels?
Starting to wonder if I made the right choice in 0 offset versus the 12+ offset option
https://www.coloradofans.com/threads/biggest-tire-size-w-o-lift.215057/page-5
Without a level kit or any suspension modification, any brand of the 265/65 R17’s will fit.
The Trail Boss comes with Duratrac’s from the factory like this.
Going up to 265/70 tires without a suspension mod, some people have mild rubbing and some do not but it’s a really tight fit regardless.
The knobbier tires like the Duratrac’s seem to have mild rubbing, some people have gotten 265/70 KO2’s and been OK
https://www.coloradofans.com/threads/biggest-tire-size-w-o-lift.215057/page-5
I recently put a set of 265/70/17 on in place of the 265/65/17 and to my surprise I have yet to hear them rubbing or see any evidence of them rubbing.
That said I know that 265/70/17 size can have some significant variations in actual width depending on brand and tread design.
I would not try anything bigger than a 265/70/17.
If you want a guaranteed size larger than the 255 then the OEM size use on the trail boss would be a good choice, which is a 265/65/17.
https://www.coloradofans.com/threads/biggest-tire-size-w-o-lift.215057/page-7
So based on the owner’s feedback, as you’ve seen above, these are Colorado owners who have fitted the bigger tires without any additional suspension or wheel mods.
They confirm that the 265/70/17 or 31.6” is the biggest size you can go without any dramas.
Resources
Final Thoughts
Before splurging on larger tires, consider your primary needs.
Are you seeking aesthetics or do you require practicality, off-road capabilities, or load-carrying ability?
Determine future accessories or towing plans to decide on the right suspension upgrade for larger tires.
For purely aesthetic upgrades without off-road plans, the stock suspension suffices, even without a lift.
A stock-height truck accommodates the same tire size as one with a 2″ lift in this scenario.
