What are the biggest tires I can put on a Chevy Colorado?
The largest tires you can fit on a Chevy Colorado without major modification are generally around 31 to 32 inches in overall diameter, depending on wheel size and trim. The factory ZR2, however, ships with 33-inch tires, and bigger sizes typically require suspension changes, trimming, and careful alignment. This article breaks down what fits, what to expect, and how to safely go bigger.
How tire size is limited on the Colorado
Understanding the practical limits starts with the basics: the stock wheel wells, fenders, suspension geometry, and the drivetrain’s clearance all determine what can fit. Non-ZR2 Colorado models sit lower and have less interior room in the wheel arches than the ZR2, so they usually require some modification to run larger rubber. Once you lift or level the suspension and potentially trim inner fender/liner, you can accommodate larger tires, but there are trade-offs such as altered handling, speedometer accuracy, and possibly warranty implications.
Stock tire sizes by trim
Below is a snapshot of typical tire sizes by wheel size and trim. Actual sizes can vary by model year and market, so verify with your owner’s manual or dealer before purchasing.
- 16-inch wheels (base WT/Work Truck and related trims): commonly around 255/70R16 or 265/70R16 in many configurations.
- 17-inch wheels (mid-range LT and Z71 variants): commonly around 265/65R17 or 275/65R17 depending on the exact trim.
- 18-inch wheels (higher-trim and off-road oriented): commonly around 265/60R18 or 275/60R18 depending on the package and year.
- ZR2 (factory off-road variant): ships with 33-inch tires, typically in the range of 33x10.5R17 or equivalent sizing on a 17-inch wheel.
Conclusion: The biggest tires that come straight from the factory without changes are determined by wheel size and whether the truck is a ZR2. For most other Colorado models, you’ll start seeing noticeable gains in diameter with moderate modifications rather than a direct swap to truly oversized tires from stock.
What’s the biggest you can run without major modifications
Before attempting any tire change, it’s useful to know the typical practical limits for a stock or slightly altered Colorado. This helps you avoid rubbing and balance issues without committing to permanent modifications.
- 16-inch wheels: up to about 30.5–32 inches in overall diameter with careful selection, though rubbing can occur on turns or full compression. A cautious path is around 30.6–31.5 inches (examples include 275/70R16 or similar).
- 17-inch wheels: up to roughly 31–32 inches in diameter, with common choices around 275/65R17 or 275/70R17 depending on clearance.
- 18-inch wheels: up to about 31–32 inches, with popular options around 275/60R18 or 285/60R18 if clearance allows.
Conclusion: Pushing into the 33-inch class without lifting is generally not practical on most non-ZR2 Colorado models. If you want to push beyond 32 inches, anticipate some modification, alignment work, and potential rubbing that must be managed.
To go bigger: leveling and suspension lifts
If you’re aiming for a noticeable jump in tire size, a leveling kit or a shallow suspension lift is often the first step. This creates the necessary clearance for larger tires while maintaining street manners and steering feel.
- Leveling kits (1–2 inches): commonly enable 33-inch tires on 17–18 inch wheels when paired with careful tire selection and minor trimming. This is a popular upgrade for a tougher look and improved off-road capability.
- 2–4 inch suspension lifts: enable a broader range, including 33–35 inch tires on appropriate wheel sizes. A lift also helps with approach/departure angles and off-road capability, but you’ll want to verify bump stop geometry and drivetrain clearance.
Conclusion: A leveling kit or modest lift expands your tire options significantly. Always account for steering geometry, rubbing potential, speedometer recalibration, and warranty coverage when planning suspension changes.
Colorado ZR2: factory big tires and beyond
The Colorado ZR2 is the model most associated with true off-road tire size guidance. It ships with 33-inch tires from the factory and a beefier suspension to match. This baseline makes it more capable off-road, but exceeding those dimensions requires further lifting and protection modifications.
When considering tires larger than the ZR2’s stock 33-inch setup, expect to need a higher lift (often 2–4 inches), careful fender trimming or body work, upgraded shocks, and precise alignment. It’s also prudent to check the drivetrain’s gear ratios and speedometer recalibration, since larger tires alter overall gearing and indicated speed.
Important considerations
Before committing to larger tires, factor in the following:
- Gearing and speedometer accuracy: larger tires change final drive ratio, which can affect acceleration and fuel economy; recalibration may be needed.
- Avoiding interference: ensure no rubbing on fender liners, control arms, or the bumper during full steering lock and suspension articulation.
- Drive-train and warranty: modifications can influence drivetrain wear and may affect warranty terms; consult the dealer or manufacturer guidance.
- Alignment and safety: ensure professional alignment after any change to tires or suspension to maintain handling and tire wear.
Conclusion: The ZR2 remains the most straightforward Colorado to outfit with bigger tires, but anything larger than stock typically requires careful planning, parts, and professional installation.
Summary
For most Chevy Colorados, the practical, non-modified maximum tire size sits in the low 30s in diameter—around 31–32 inches—depending on wheel size and trim. The ZR2 ships with 33-inch tires, reflecting its dedicated off-road setup. If you want bigger tires on a non-ZR2 truck, a leveling kit or a lift is usually necessary, along with trim and fender considerations, alignment, and potential gearing/speedometer recalibration. Always verify fitment for your exact year, trim, and wheel configuration with reliable sources (owner’s manual, dealership, or a known tire shop) before purchasing.
