2015 Chevrolet Suburban Tire Size & Pressure Specs

Here is your comprehensive guide to the tire and wheel specifications for the 2015 Chevrolet Suburban. Whether you are replacing worn-out rubber, upgrading to a larger wheel size, or just performing routine maintenance, having the correct specifications is crucial for safety and performance.

Quick answer

• OEM Tire Sizes: 265/65R18, 275/55R20, or 285/45R22
• Recommended Cold Tire Pressure: 35 PSI Front / 35 PSI Rear (check driver's side door placard)
• Bolt Pattern: 6x139.7 (6x5.5")
• Wheel Sizes: 18x8.5, 20x9, or 22x9 (Offset typically +24 to +31)
• Load Index / Speed Rating: 114T (18"), 111S (20"), 110H (22")
• Spare Tire Size: 265/70R17 (Temporary/Full-size matching diameter)
• TPMS Frequency: 315 MHz

Tire sizes by trim

The 2015 Chevrolet Suburban was offered in LS, LT, and LTZ trims. Wheel sizes varied depending on the trim and optional packages selected at the dealership.

Recommended replacement tires

When outfitting a full-size SUV like the Suburban, you need a tire that balances load-carrying capacity with ride comfort and all-season traction. Here are a few top-rated options:

1. Michelin Defender LTX M/S (Premium) – The gold standard for full-size SUVs. Offers exceptional tread life, a quiet ride, and great wet/snow traction.
2. BFGoodrich All-Terrain T/A KO2 (Premium All-Terrain) – Excellent for drivers who take their Suburban off-road or deal with severe winter weather, while still providing acceptable on-road manners.
3. Continental TerrainContact H/T (Mid-Range) – A superb highway-terrain tire that balances cost, ride comfort, and durability.
4. Kumho Crugen HT51 (Budget-Friendly) – A highly rated, affordable option that performs well for daily commuting and highway driving.

When to inflate to max load psi

While the 2015 Chevrolet Suburban (1500 chassis) is technically a half-ton SUV and not an HD truck, it is frequently used for heavy towing and hauling. The standard recommended pressure is 35 PSI for normal driving.

However, if you are towing a heavy travel trailer or loading the vehicle to its Gross Vehicle Weight Rating (GVWR), you may need to increase the rear tire pressure. Check the sidewall of your specific tires for the maximum cold PSI (often 44 to 50 PSI for P-metric/Euro-metric tires, or up to 80 PSI if you have upgraded to LT/E-load tires). Increasing pressure closer to the max rating stiffens the sidewall, reducing sway and heat buildup when towing heavy loads. Always lower the pressure back to 35 PSI for everyday driving to prevent harsh ride quality and uneven center tread wear.

Lug nut torque & pattern

Proper wheel installation is critical on heavy SUVs to prevent wheel-off conditions and warped brake rotors.

• Bolt Pattern: 6x139.7 mm (also known as 6x5.5 inches)
• Lug Nut Torque: 140 lb-ft (190 Nm)
• Thread Size: M14 x 1.5

Tech Tip: Always tighten lug nuts in a star/crisscross pattern. Re-torque the lug nuts after 50 to 100 miles of driving following a wheel installation.

Common tire issues for this vehicle

• Outer Edge Wear: The Suburban is a heavy vehicle with a high center of gravity. Aggressive cornering often leads to accelerated wear on the outer shoulders of the front tires. Routine tire rotations (every 5,000–7,000 miles) are essential.
• Cupping/Feathering: If the shocks (especially the Magnetic Ride Control shocks on LTZ models) begin to fail, or if the vehicle is out of alignment, you may experience tire cupping or feathering, leading to a loud "womp-womp" noise at highway speeds.
• TPMS Sensor Battery Failure: The 315 MHz TPMS sensors on the 2015 models are reaching the end of their 7-10 year battery life. If your tire pressure light flashes for 60 seconds upon startup and then stays solid, you likely have a dead sensor rather than a flat tire.

Need new tires? Find a trusted shop on Repairius.