The Chevrolet Silverado 1500 (and its GMC Sierra 1500 twin) is the second most popular truck in America. While factory highway tires leave massive, empty gaps inside the wheel arches, nobody wants to spend thousands on an expensive suspension lift just to run beefier rubber. Here is the real-world, verified guide to the absolute biggest tire sizes you can mount on a 100% factory stock Chevy Silverado 1500 without cutting, trimming, or listening to annoying tire rub.
On a 100% factory stock 4WD Chevy Silverado 1500 (both 2014–2018 K2XX and 2019–2026 T1XX generations), the maximum zero-rub tire size is a true 33-inch tire (up to 33.2" tall and 11.2" wide) on factory wheels.
The three undisputed sweet-spot sizes are 275/60R20 (33.0" tall) for 20-inch wheels, 275/70R18 (33.2" tall) for 18-inch wheels, and 285/70R17 (32.7" tall) for 17-inch wheels. All clear front upper control arms and fender liners with zero modifications.
True 33.0" diameter. Fits factory 20s with 0% rubbing. Severe snow 3PMSF rated all-terrain bite.
CNC billet aircraft aluminum. Eliminates factory nose rake and clears larger rubber in 2 hours.
Complete loaded lifted strut assemblies. Replaces factory shocks while leveling truck stance.
Max Stock Tire Sizes by Rim Diameter (Zero-Rub Guarantee)
Chevrolet equips the Silverado with wheel sizes ranging from 17 inches on work trucks up to 22 inches on High Country luxury trims. Here is the exact maximum tire dimension for each factory wheel:
| Wheel Diameter | Max Stock Tire Size | Dimensions in Inches | Clearance & Rub Risk |
|---|---|---|---|
| 17-Inch Factory Wheels | 285/70R17 | 32.7" tall × 11.2" wide | 0% Rub: 1.5" clearance to Upper Control Arm |
| 18-Inch Factory Wheels | 275/70R18 | 33.2" tall × 10.8" wide | 0% Rub: Perfect tall & narrow all-terrain fit |
| 20-Inch Factory Wheels | 275/60R20 | 33.0" tall × 10.8" wide | 0% Rub: Factory Trail Boss size, fits all LT/RST |
| 22-Inch Factory Wheels | 275/50R22 | 32.8" tall × 10.8" wide | 0% Rub: Clears front air dam on High Country |
| Trail Boss / AT4 (Factory 2" Lift) | 295/70R18 or 285/65R20 | 34.3" – 34.6" tall × 11.5" wide | 0% Rub: Clears factory Rancho suspension easily |
| Direct Amazon Upgrade | Shop 33" Tires (275/60R20) → | MotoFab 2" Level ($59) → | Rough Country N3 Struts → |
Can You Fit 35s on a Stock Silverado 1500?
A true 35-inch tire (such as a 35x12.50R20 or 315/70R17) will rub aggressively on a factory stock Silverado 1500. Do not let forum rumors convince you otherwise unless you enjoy the sound of plastic grinding every time you pull into a parking spot.
Specifically, 35s on a stock Silverado will hit in three critical spots:
- The Front Lower Air Dam & Bumper Valence: At full steering lock, the outer tire tread knobs will jam against the lower plastic bumper corner.
- The Rear Mudflap & Cab Bracket: When backing up with the wheels turned, the tire sweeps inward and hits the steel bracket behind the front wheel liner.
- The Upper Control Arm (UCA): Because factory Chevy wheels have high positive offset (+26mm to +28mm), a 12.5-inch wide tire sits very close to the suspension. The inner sidewall will rub against the ball joint cup on the upper control arm.
The Fix for 35s: To comfortably run 35s on a Silverado 1500, you need a simple 2.0-inch to 2.5-inch front leveling kit (such as billet strut spacers) and unbolting the small metal mudflap bracket behind the wheel liner (a 10-minute job with a basic ratchet).
The Trail Boss & GMC Sierra AT4 Exception (The Factory 2" Lift)
If you drive a Silverado Trail Boss (Custom or LT) or a GMC Sierra AT4, your truck came from the GM factory with a pre-installed 2-inch suspension lift, revised knuckles, and tuned Rancho or Multimatic DSSV shocks.
Because you already have 2 inches of added clearance over standard WT, Custom, LT, and RST models, you can run a true 34-inch tire right off the showroom floor:
295/70R18(measures 34.3" × 11.6") on factory 18-inch wheels with zero rubbing.285/65R20(measures 34.6" × 11.2") on factory 20-inch wheels with zero rubbing.
The Aftermarket Wheel Offset Trap: Why Stance Causes Rubbing
Many Silverado owners buy larger tires at the same time they buy aftermarket custom wheels. This is where most rubbing headaches start.
Factory Silverado wheels have roughly +26mm to +28mm offset, which keeps the tire tucked neatly inside the wheel well. If you buy aggressive aftermarket wheels with zero offset (0mm) or deep negative offset (-12mm or -24mm) to make the tires poke out past the fenders, you expand the tire's steering swing radius like a swinging gate.
On aftermarket wheels with negative offset, even a modest 33-inch tire will hit the fender liners at half lock. If you are staying on stock suspension, stick to wheels with an offset between +12mm and +26mm.
Check Your Exact Wheel & Tire Clearance
Compare tire diameters, backspacing, and inner strut clearance before buying your new wheel and tire setup.