Biggest Tire Size for a 4‑Cylinder Chevy Colorado: 265/75R16 or 245/75R17 (Stock)

Max Tire Without Major Mods

For a Chevy Colorado with the 4‑cylinder engine (2.5L or 2.8L, depending on year), the largest tire you can fit without suspension lift, body mount chopping, or fender trimming is generally:

• 265/75R16 (~31.6″ diameter, 10.4″ wide) – on 16″ wheels
• 245/75R17 (~31.5″ diameter, 9.6″ wide) – on 17″ wheels

What Changes If You Modify

Trade‑offs of Larger Tires

• Power/Fuel Economy: 4‑cyl struggles more with rotational mass & gearing; expect 1–3 MPG loss.
• Speedometer: Reads slow; needs recalibration (tuner/programmer).
• Braking/Handling: Longer stops, heavier steering.
• Warranty: May void drivetrain warranty if dealer links failure to tire size.

Best Practice

Consult a Colorado‑specialist shop or tire pro for your exact year/trim/wheel offset. What fits a 2015 Z71 may rub on a 2023 WT.