Chevrolet Colorado Tire Size Guide: OEM, Plus-One & Off-Road Options

You're standing in the tire shop parking lot, phone in hand, squinting at the sidewall of your Colorado's front tire. The numbers read 265/65R17. Is that stock? Will a 265/70R17 clear the fender at full lock? Can you run 31s on the factory suspension without trimming plastic? It depends on your year, trim, and what you're trying to do. I've watched guys throw 33s on a stock LT and limp home with shredded fender liners. This guide lays out every factory size by generation, the plus-one math, and what actually fits without a lift.

Most Chevy Colorados run 265/65R17 or 265/70R16 from the factory, depending on trim and year. Third-gen models (2023-present) moved to 265/60R18 on higher trims. A plus-one upgrade lands at 265/70R17 or 275/65R18 and fits without a lift. For trail work, 31-inch tires (265/70R17) clear on stock suspension. The ZR2 ships with 31x10.5R17 from the factory. Always confirm against your door-jamb sticker before buying.

Factory Tire Sizes by Generation and Trim

Chevy ran the Colorado nameplate across three different platforms. The first-gen truck (2004-2012) differs from the second-gen (2015-2022), and the third-gen (2023+) moved to bigger wheels on most trims. Knowing which generation you have matters, because the bolt pattern itself changes between gen one and gen two.

Before you trust any chart online, pop the driver's door open and read the yellow sticker on the B-pillar. That sticker is the only authoritative source for your specific truck. Trim swaps, dealer-installed packages, and prior-owner wheel changes all muddy the water. If you're matching interior trim parts too, here's how to find your Colorado trim code and interior color code at the same time.

First Gen Colorado (2004-2012)

Base WT trucks ran 205/75R15 on steelies. LS and LT trims stepped up to 235/75R15 or 235/65R16. The Z71 off-road package brought 245/65R17. Bolt pattern was 6x139.7 mm, shared with the old S-10.

Second Gen Colorado (2015-2022)

Base WT shipped on 16-inch wheels with 255/70R16. LT and Z71 trims wore 265/65R17. The ZR2, introduced in 2017, ran 31x10.5R17 from the factory. Bolt pattern switched to 6x120 mm, so first-gen wheels don't bolt up.

Third Gen Colorado (2023-Present)

The new platform comes on 17, 18, or 20-inch wheels depending on trim. Work Truck stays on 265/70R17. LT and Trail Boss use 265/65R18. Z71 and ZR2 run 265/70R17 in all-terrain rubber, though ZR2 Bison gets a 33-inch option. Same 6x120 bolt pattern as gen two.

Generation	Trim	Factory Tire Size	Wheel
Gen 1 (2004-2012)	WT	205/75R15	15x6
Gen 1	LT/LS	235/75R15 or 235/65R16	16x7
Gen 1	Z71	245/65R17	17x7
Gen 2 (2015-2022)	WT	255/70R16	16x7
Gen 2	LT/Z71	265/65R17	17x8
Gen 2	ZR2	31x10.5R17	17x8
Gen 3 (2023+)	WT	265/70R17	17x8
Gen 3	LT/Trail Boss	265/65R18	18x8
Gen 3	ZR2	33x12.5R17	17x8.5

Cross-check against the Chevrolet spec page for your exact build before you order anything.

How to Read Your Colorado Tire Size

If you've never decoded a tire string, here's the short version. A size like 265/65R17 breaks into three parts. The 265 is section width in millimeters, measured sidewall to sidewall. The 65 is aspect ratio, meaning the sidewall height is 65% of that 265 mm width. The R means radial construction, which is what every modern truck uses. The 17 is the rim diameter in inches.

Math out the overall diameter and you get roughly 30.6 inches for a 265/65R17. That's the number that matters for fender clearance and speedometer accuracy.

Look at the smaller numbers next to the size. A tag like 112T is load index and speed rating. Load index 112 means the tire can carry 2,469 lbs at full pressure. Speed rating T means rated to 118 mph, which is plenty for a midsize truck.

You'll find the factory size in two places: the sidewall of the tire itself, and the yellow sticker inside the driver's door jamb. If those two don't match, somebody changed the wheels.

Plus-One Sizing for the Chevy Colorado

Plus-one is the easy upgrade. You bump the rim diameter up by one inch and drop the sidewall to keep overall diameter close to stock. Speedometer stays honest, gearing stays sane, and you get a wider footprint with a slightly better-looking stance.

For a second-gen running stock 265/65R17, the plus-one move is 275/60R18 or 265/60R18. Both come in within half an inch of stock diameter. For a third-gen Work Truck on 265/70R17, you'd jump to 265/65R18.

Here's the diameter math:

Stock Size	Plus-One Option	Stock OD	New OD	Diff
265/65R17	275/60R18	30.6"	31.0"	+0.4"
265/65R17	265/60R18	30.6"	30.5"	-0.1"
265/70R17	265/65R18	31.6"	31.5"	-0.1"
255/70R16	265/65R17	30.1"	30.6"	+0.5"

Anything over a half-inch diameter change will throw your speedometer off. At 60 mph indicated, a 1-inch diameter increase reads about 1.5 mph low. Not the end of the world, but worth knowing if you're the type who sets cruise on the dot.

Check three clearance points before you commit: the front fender liner at full steering lock, the upper control arm, and the inner edge of the brake caliper. A test fit at the tire shop costs nothing.

Off-Road Tire Options That Fit Without a Lift

This is where most owners go sideways. The marketing photos show 35s on a stock truck. The reality is your fender liner shredding itself on the first hard left at the trailhead.

31-Inch Tires on Stock Suspension

A 265/70R17 measures 31.6 inches and fits a stock second- or third-gen Colorado with zero suspension work. That's the sweet spot. You get real all-terrain tread, an extra inch of diameter for ground clearance, and no rubbing under normal driving. A few owners on the forums report a light kiss against the front mud flap at full lock with the wheel reversed, which a $3 trim of the flap fixes. Ask anyone running a 2nd-gen Z71 on Falken Wildpeaks or Wrangler Duratracs in 265/70R17, they'll tell you it's the no-brainer upgrade.

32-Inch Tires and Minimum Lift Required

Jump to a 265/75R17 (32.6") or 285/70R17 (32.7") and you need at least a 2-inch level kit up front. The factory rake means the front sits lower than the rear, so leveling the truck buys you the clearance for a 32. Without that level, you'll rub the fender liner and possibly the upper control arm under articulation. A 33 requires a full 3-inch lift plus fender liner trimming, and even then you're cutting close at full steering lock.

Mud-terrains weigh more than all-terrains. A 265/70R17 KO2 weighs about 47 lbs. The same size in BFG Mud-Terrain T/A KM3 is 53 lbs. That weight lives unsprung and rotating, which the 308 hp 3.6L V6 will feel at the on-ramp and at the pump.

ZR2 Tire Size and Why It Stands Apart

The ZR2 is its own thing. Chevy didn't just slap a sticker on a Z71. The truck comes with a factory 2-inch suspension lift, wider front and rear track (3.5 inches wider than a Z71), DSSV spool-valve dampers, and front and rear locking diffs. The tire that makes it all work is a 31x10.5R17 BFGoodrich All-Terrain T/A KO2 on a 17x8 wheel.

That tire stands 31 inches tall and 10.5 inches wide, which is genuinely huge for a midsize. The reason a ZR2 clears it without rubbing while a Z71 needs a level for 32s is that built-in lift and wider track. You're not paying for badges on a ZR2. You're paying for the geometry that lets the tire move where it needs to without hitting metal.

If you own a ZR2 and want to step up, 285/70R17 (32.7") fits with no further mods. 315/70R17 (34.4") needs minor fender liner trimming but it's doable. The factory KO2 is also one of the easiest tires to replace, every shop in the country stocks it.

Tire Pressure Specs and Load Ratings for the Colorado

Pop the door, find the yellow sticker, and trust it. For most second- and third-gen Colorados, the factory call is 35 PSI cold front and rear. First-gen trucks ran lower, usually 30 PSI on the smaller 15-inch tires.

When you're towing near the 7,700-lb max or hauling a bed full of gravel, bump the rear up by 5 PSI. That keeps the sidewall from rolling under load and gives you better steering response. Air it back down when the trailer's off, because over-inflated tires center-wear and ride like a brick.

Load index matters when you swap aftermarket tires. The Colorado is a midsize, not a half-ton, so you don't need an E-rated 10-ply unless you're regularly hauling at max payload. A standard load (SL) or extra load (XL) P-metric handles daily use just fine. Going to a load range C or E light truck tire adds weight and harshens the ride for capability most owners never use.

TPMS sensors on the Colorado run at 315 MHz. If you're swapping to aftermarket wheels, buy clone sensors or relearn the originals with a scan tool. Otherwise that yellow light is your new dashboard companion.

Keeping Your Colorado's Interior in Shape While You Upgrade

Here's what nobody tells you when you start chasing bigger tires. The same trail run that puts your new 31s through their paces puts a half pound of red Utah dust, gravel, and creek water on your driver's seat. I've seen factory cloth seats on three-year-old Z71s look like they came out of a 15-year-old work truck because the owner kept getting in with muddy Carhartts.

If your Colorado is your daily and your weekend toy, the seats take it from both sides. Coffee on Monday, juice spill Tuesday, dog hair Wednesday, trail mud Saturday. We make tailored seat covers for the Chevrolet Colorado cut from your year-make-model spec, with airbag-safe seams and an install that takes about 45 minutes in the driveway. They're airbag-safe, they protect the factory upholstery underneath (which matters at resale), and they look factory-installed when they're on.

If you're running an older first-gen, we also have specific 2005 Chevrolet Colorado seat covers cut for that earlier bench and bucket layout. The full product line lives under our Luxury Seat Covers for trucks and SUVs page.

Common Tire Upgrade Mistakes Colorado Owners Make

Four mistakes I see over and over on the forums:

1. Going too wide. A 285 or 295 section width on stock suspension will rub the front fender liner at full lock, every single time. Width matters more than diameter for clearance. Stay at 265-275 unless you've leveled or lifted.

2. Ignoring the speedometer. A bigger tire makes your speedo read low. If you're moving from 30.6" stock to 31.6" 31s, you're actually doing 62 mph when the dash reads 60. That matters for your odometer (warranty mileage), for your transmission shift points, and for tickets. A handheld tuner or a dealer recal fixes it in 10 minutes.

3. Buying tires before checking the bolt pattern. Second- and third-gen Colorado is 6x120 mm. First-gen is 6x139.7 mm. They look similar, they're not interchangeable. Don't trust a Marketplace listing that says "fits all Colorados."

4. Skipping the alignment. New tires, new toe spec. Especially after a level kit. A $120 alignment saves $800 in inside-edge wear on a fresh set of KO2s.

While you're getting the rest of the truck dialed, browse seat covers by vehicle category and grab the right steering wheel cover size too. The factory wheel gets sticky from sunscreen and trail dust faster than most people expect.

Frequently Asked Questions

Q: What size tires will fit a Chevy Colorado?

Most second- and third-gen Colorados accept 265/70R17 with zero modifications. That's a 31-inch all-terrain and it's the most common upgrade from the stock 265/65R17 on Z71 trims. Step up to 32s (265/75R17 or 285/70R17) and you need a 2-inch level kit at minimum. ZR2 models clear 31x10.5R17 from the factory thanks to their built-in lift and wider track.

Q: Can I put 33-inch tires on a Chevy Colorado?

33-inch tires need at least a 3-inch lift and fender liner trimming on a standard Colorado. On stock suspension, 33s will rub the inner fender at full steering lock and bind the upper control arm under articulation. The only exception is the ZR2 Bison, which ships with 33s from the factory because it has the lift, wider track, and rock sliders engineered around them.

Q: What is the bolt pattern on a Chevy Colorado?

Second-gen (2015-2022) and third-gen (2023+) Colorados use a 6x120 mm bolt pattern, shared with the Chevy Trailblazer and GMC Acadia. First-gen Colorados (2004-2012) used 6x139.7 mm, the same as full-size GM trucks and S-10s. Wheels are not interchangeable between generations. Confirm before you buy, because the patterns look almost identical at a glance.

Q: Does changing tire size affect the speedometer on a Colorado?

Yes. Bigger overall diameter makes the speedometer read low. Going from a 265/65R17 (30.6") to a 265/70R17 (31.6") adds roughly 1.5 mph of error at 60 indicated. The odometer also under-counts by about 3%. A handheld tuner like a Hypertech or a dealer-side scan tool recalibration corrects both. The transmission also uses speed input for shift points, so tuning matters beyond just the gauge.

Q: What tire size does the Chevy Colorado ZR2 use from the factory?

The ZR2 ships with 31x10.5R17 BFGoodrich All-Terrain T/A KO2 tires on 17x8 wheels. It has a factory 2-inch suspension lift and a track width 3.5 inches wider than a Z71, which is why it clears that size with no rubbing. The ZR2 Bison variant moves up to 33x12.5R17 from the factory with additional fender flares and rock-protection equipment.

Q: What is the recommended tire pressure for a Chevy Colorado?

The door-jamb sticker is the authoritative source, but most second- and third-gen Colorados call for 35 PSI cold in both front and rear. First-gen trucks on smaller 15-inch tires typically called for 30 PSI. Bump the rear up by 5 PSI when towing near the 7,700-lb max or hauling heavy payload, then drop it back when you're empty. Over-inflation center-wears the tread and harshens the ride.

See covers shaped for your specific Chevrolet Colorado, airbag-safe and built to install in under an hour: check the 2004 Chevrolet Colorado seat covers page for fitment and color options.

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