285/75R17 Tire Size

All You Need to Know About 285/75R17 Tires

285/75R17 tires are 285 mm wide (11.2 inches wide), with a 75% aspect ratio and a 17-inch wheel diameter, resulting in an overall diameter of ≈33.8 inches and a sidewall height of ≈8.4 inches. The approved rim width range typically falls between 7.5 and 9.5 inches.

This page focuses on the dimensional behavior of 285/75R17 and how its tall sidewall and large diameter affect clearance, gearing, and off-road performance. For load-carrying construction and pressure-related behavior, see LT285/75R17 tires.

At ≈8.4 inches, the 285/75R17 sidewall operates in a high-deflection range where controlled deformation under reduced inflation pressure increases the tire's contact footprint on uneven terrain - the primary mechanism behind its off-road traction advantage. This same compliance, however, increases sidewall movement during cornering and braking compared to lower-profile sizes.

285/75R17 Size Quick Specs

• Approved rim width range: 7.5-9.5"
• Optimal rim width: 8.0"-8.5"
• Width: 285 mm
• Sidewall height: ≈214 mm 
• Overall diameter: ≈33.8"
• Wheel diameter: 17"

Note: While the calculated OD of 285/75R17 size is ≈33.8 inches, the actual tire diameter may vary up to 34.1 inches depending on tread depth and construction.

285/75R17 Common Vehicle Fitment

285/75R17 carries no documented OEM fitments; it is used exclusively in modified, lifted, and aftermarket off-road builds where increased ground clearance and a larger contact patch are the primary objectives. Common applications met in the U.S include: 

• Jeep Wrangler JK/JL — requires a minimum 2–2.5 inch suspension lift and appropriate wheel offset; rubbing at full lock is common without modification
• Toyota Tacoma / 4Runner — fitment documented on modified builds with aftermarket wheels at negative or zero offset
• Ford F-150 - commonly run with a leveling kit; stock suspension clearance is insufficient in most configurations
• Chevrolet Silverado / GMC Sierra - used in off-road configurations, typically alongside a lift or leveling kit

At ≈33.8 inches in diameter, 285/75R17 fitment requires verification of fender clearance, suspension travel, and steering articulation - particularly under full compression and full steering lock, where contact with inner fender liners and upper control arms is most likely.

285/75R17 Dimensions in Inches

The 285/75R17 measures approximately 11.2 inches in width, 33.8 inches in diameter, and 8.4 inches in sidewall height.

Compared to a typical OEM truck fitment such as 265/70R17 (31.6 inches), the 285/75R17's 33.8-inch diameter increases ground clearance and reduces wheel rotation frequency, which affects effective gearing and speedometer accuracy. The tall sidewall improves impact absorption and traction on uneven terrain but introduces more lateral flex under load.

285/75R17 in Inches: Full Measurement Set

• Overall diameter: ≈33.8"
• Width: ≈11.2"
• Sidewall height: ≈8.4"
• Wheel diameter: 17"
• Circumference: ≈106.2"

Comparison of 285/75R17 With Similar Tire Sizes

285/75R17 is often compared with 275/70R17, which is slightly smaller, and 285/70R17, which maintains width but reduces overall diameter.

285/75R17 vs 275/70R17

• Width: 285/75R17 is 10 mm wider than 275/70R17
• Overall diameter: 285/75R17 is larger - approximately 1.67 inches (≈4.9%) greater in overall diameter than the 275/70R17

At ≈4.9%, the difference in overall diameter between the 285/75R17 and the 275/70R17 significantly exceeds the ±3% substitution threshold, making these two sizes incompatible as direct replacements. Fitting the 285/75R17 in place of the 275/70R17 raises ride height, reduces rotational frequency, and introduces measurable speedometer error. Gearing, ABS calibration, and fender clearance must all be verified before fitment.

285/75R17 vs 285/70R17

• Width: identical at 285 mm across both sizes
• Overall diameter: 285/75R17 is larger - approximately 1.12 inches (≈3.3%) greater in overall diameter than the 285/70R17

At ≈3.3%, the difference in overall diameter between the 285/75R17 and the 285/70R17 marginally exceeds the ±3% substitution threshold, placing these two sizes outside direct replacement limits. The taller 285/75R17 raises ride height, reduces rotational frequency per mile, and introduces speedometer and odometer error. On vehicles where the 285/70R17 is an OEM or near-OEM fitment, additional clearance and calibration verification are required before substituting the 285/75R17.

Before downsizing or upsizing to a 285/75R17 tire size, review how the 3% rule applies and verify clearance, gearing, and rim width compatibility.