LT225/75R17 Tire Size

All You Need to Know About LT225/75R17 Tires

LT225/75R17 is a light-truck tire size built for higher load capacity, commonly used on heavy-duty pickups, commercial vans, and fleet vehicles where structural strength and pressure capability are required.

In LT225/75R17 size, performance is defined less by dimensions and more by how the tire behaves under load. The reinforced casing and higher inflation pressures allow LT225/75R17 to maintain shape and stability when carrying weight, which is not achievable with standard passenger constructions of the same size.

Beyond dimensions, the dominant production version in the US market is LT225/75R17, built to light-truck load standards with reinforced construction and higher inflation requirements. Unmarked Euro-metric 225/75R17 versions exist but are far less common. The size marking alone does not determine load capacity - construction type, load range, and load index must always be verified separately before replacement.

LT225/75R17 Size Quick Specs

• Approved rim width range: 6.0–7.5"
• Measuring/design rim: 6.0–6.5 inches
• Width: 225 mm
• Sidewall height: 168.75 mm
• Overall diameter: ≈30.3"
• Wheel diameter: 17 in

Note: While the nominal dimensions remain consistent, LT225/75R17 tires are engineered to operate across a wider pressure range, which directly affects their load capacity and performance characteristics.

LT225/75R17 Load Range and Inflation Behavior

LT225/75R17 is most commonly available in Load Range E, which determines how much weight the tire can support at a given pressure.

Load Range E: tire pressure 80 PSI, supporting up to 3,640 lbs per tire in a single application.

Unlike passenger tires, the load capacity of LT225/75R17 is not fixed at a single value; it scales directly with inflation pressure. Running below the specified 80 psi reduces the tire's ability to support its rated lbs, increases sidewall flex, and accelerates internal heat buildup. At the correct pressure, the casing maintains its designed structure and delivers full rated load capacity with controlled deformation.

This pressure-dependent behavior is what makes correct inflation non-negotiable on LT225/75R17 in loaded applications.

Why LT225/75R17 Is Used on Heavy-Duty Vehicles

LT225/75R17 is used where vehicle load requirements exceed what standard tires can safely support. Confirmed US-market OEM applications for LT225/75R17 size include:

• Chevrolet Silverado 3500 (2008–2010)
• Chevrolet Silverado 3500 HD (2009–2010)
• GMC Sierra 3500 HD (2007–2010).

These vehicles operate under higher rear axle loads, towing stress, and sustained weight over distance - conditions that require both reinforced casing construction and elevated inflation pressure to maintain load capacity.

In many cases, the LT225/75R17 size appears on dual rear wheel (DRW) configurations, where maintaining consistent load distribution between paired tires is critical. Higher axle weight demands higher PSI and a reinforced casing, which is precisely what the LT designation provides.

LT225/75R17 Dimensions in Inches

The LT225/75R17 tire size is ≈8.86 inches wide, ≈30.3 inches tall overall, and ≈6.64 inches in sidewall height.

At this diameter, the LT225/75R17 tire travels approximately 95.15 inches per rotation, which influences gearing and speed calibration, particularly under load.

Most Recommended LT225/75R17 Tires

Best tires in LT225/75R17 size include: Hankook Dynapro AT2 Xtreme RF12