275/50R17 Tire Size

All You Need to Know About 275/50R17 Tires

275/50R17 tires are 275 mm wide, with a 50% aspect ratio and a 17-inch wheel diameter, producing an overall diameter of 27.8 inches and a sidewall height of 5.4 inches.

The 275/50R17 occupies an uncommon position in the 17-inch lineup - it is wider than most production-car passenger sizes yet carries a taller sidewall than the 35- and 40-series profiles that dominate the performance market at this width. That profile combination results in a tire that prioritizes rear traction and contact-patch area over lateral stiffness, making it a fit for high-displacement vehicles where forward grip is the constraint rather than cornering response.

Compared to the 275/55R17, the 275/50R17 reduces sidewall height by approximately 13.75 mm, which lowers overall diameter by roughly 1.1 inches - a difference that exceeds the standard ±3% interchangeability threshold. Against the 265/50R17, the section width increases by 10 mm while overall diameter stays within 1.5%, making it the closest cross-reference if a slightly wider footprint is needed without altering rolling circumference meaningfully.

275/50R17 Size Quick Specs

• Approved rim width range: 7.5-9.5"
• Width: 275 mm
• Sidewall height: 137.5 mm
• Overall diameter: 27.8"
• Wheel diameter: 17 in

Note: The calculated overall diameter of 275/50R17 is ≈27.8 inches. Minor variation occurs across manufacturers due to tread design and casing construction. Mounting on rims within the approved 7.5–9.5" width range also affects measured section width and sidewall stance. Learn more about Rim Width Ranges and Limits.

275/50R17 Common Vehicle Fitment

The 275/50R17 size is predominantly selected for specialty aftermarket applications - particularly drag-oriented muscle cars and custom rear-wheel-drive builds - where a wide, moderately tall rear tire is used to maximize traction. Common platform examples that have employed this size in aftermarket configurations include:

• Chevrolet Camaro (various generations, rear-axle aftermarket fitment)
• Pontiac Firebird / Trans Am (aftermarket performance builds)
• Chevrolet Impala SS / Caprice (non-OEM size, used as a taller alternative to 255/50R17)

Because 275/50R17 carries no U.S. OEM fitment designation, it functions as a deliberate deviation from factory specifications. Before selecting this size, diameter compatibility with existing gearing, ABS calibration, and wheel well clearance must be verified against the vehicle's actual factory baseline.

275/50R17 Dimensions in Inches

The 275/50R17 tire size measures approximately 10.8 inches in width, 27.8 inches in overall diameter, and has a sidewall height of about 5.4 inches.

The dominant characteristic of the 275/50R17  size is how it combines wide section width with a meaningful sidewall presence. At 5.4 inches of sidewall height, it offers more flex than the 275/40 or 275/45 variants, which absorbs road inputs better and maintains grip consistency across slightly irregular surfaces - a trait relevant on the imperfect pavement where drag-focused builds often operate outside the strip.

275/50R17 in Inches: All Measurements

• Overall diameter: ≈27.8"
• Width: 10.8"
• Sidewall height: 5.4"
• Wheel diameter: 17"
• Circumference: ≈87.4"

Comparison of 275/50R17 With Similar Tire Sizes

275/50R17 is best understood in relation to the 275/55R17 as its taller alternative and the 265/50R17 as a narrower option that remains close in diameter - the most practical cross-references when selecting a replacement or considering a compatible size.

Difference Between 275/50R17 and 275/55R17 Tire Sizes

The 275/55R17 is taller while maintaining the same width:

• Width: identical at 275 mm
• Overall diameter: 275/55R17 is ≈1.1 inches (≈3.9%) larger than 275/50R17

This difference exceeds the ±3% interchangeability threshold, meaning the two sizes are not direct substitutes from a diameter standpoint. The taller 275/55R17 further raises ride height and increases sidewall compliance, so clearance, speedometer calibration, and system tolerance should all be confirmed before switching.

Difference Between 275/50R17 and 265/50R17 Tire Sizes

The 265/50R17 is narrower and slightly shorter:

• Width: 265/50R17 is 10 mm narrower
• Overall diameter: 265/50R17 is ≈0.40 inches (≈1.4%) smaller than 275/50R17

The diameter difference stays within the ±3% range, so these two sizes ( 265/50R17 and 275/50R17) are generally interchangeable from a rolling circumference standpoint. The trade-off is a narrower contact patch of the 265/50R17 and a corresponding reduction in footprint width, which modifies rear traction balance on high-power vehicles.

Understanding how the 3% rule applies in practice helps determine whether this width change is acceptable for a given platform.