275/40ZR17 Tire Size

All You Need to Know About 275/40ZR17 Tires

275/40ZR17 tires are 275 mm wide, use a 40-series sidewall, and fit 17-inch wheels. The  275/40ZR17 size is consistently shown at about 25.7 inches overall diameter, 10.8 inches section width, and an approved 9.0–11.0 inch rim width range, making it a true low-profile performance size for staggered rear setups, muscle cars, sports cars, and performance sedans. 

The ZR marking in 275/40ZR17 identifies the size as part of the high-speed performance category, not a truck or SUV application. 

275/40ZR17 Size Quick Specs

• Overall diameter: ≈25.7 in
• Sidewall height: ≈110 mm
• Section width: 275 mm
• Rim width range: 9.0–11.0 in
• Wheel diameter: 17 in 

Note: The calculated overall diameter of 275/40ZR17 is ≈25.7 inches. Actual mounted diameter can vary slightly (±0.1–0.3 inches) by tire line and construction, but current spec tables for this size are tightly clustered around that figure. 

Common Vehicle Fitments for 275/40ZR17

The 275/40ZR17 specification represents a documented OE fitment across a select range of high-performance vehicles, predominantly as a rear tire in staggered configurations and, in certain applications, as a front fitment on purpose-built sports cars:

275/40ZR17 Confirmed Car Fitments

• Ford Mustang SVT Cobra (2001) - staggered rear 17" fitment
• Ford Mustang SVT Cobra (2003–2004) - staggered rear 17" fitment
• Chevrolet Camaro Z28/SS (1999) - staggered rear 17" fitment
• Pontiac Firebird Trans Am WS6 (2002) - 275/40ZR17 rear fitment
• Dodge Viper RT/10 (1997) - front 275/40-17 fitment

That vehicle mix tells you exactly what 275/40ZR17 size is: a low-profile performance tire used where grip and chassis response matter more than ride height. 

275/40ZR17 Dimensions in Inches

A 275/40ZR17 is ≈ 25.7 inches in overall diameter, 10.8 inches in section width, and carries a sidewall height of 4.33 inches - roughly 43% of its 275 mm tread width, as the "40" aspect ratio indicates.

275/40ZR17 in inches: all measurements

• Overall diameter: ≈25.7″
• Sidewall height: ≈4.33″
• Section width: ≈10.8″
• Circumference: ≈80.7″ 

275/40ZR17 in inches: 25.7″ × 10.8″ R17

Most Recommended 275/40ZR17 Tires

Current retail inventory shows that 275/40ZR17 is bought mainly in performance categories, not touring or truck use. The most relevant category targets are: 

• 275/40ZR17 max performance summer tires Nitto NT555 G2
• 275/40ZR17 ultra-high-performance all-season tires Falken Azenis FK460 A/S
• 275/40ZR17 extreme/track-capable street tires Toyo Proxes R888R

These categories align with current listings from Continental, Falken, Firestone, Toyo, and Nitto. 

Comparison of 275/40ZR17 With Similar Tire Sizes

Comparing 275/40ZR17 with a similar size format like 275/40R17 and P275/40R17 matters because the nominal size stays the same, but the speed-category marking, product type, and intended use can change significantly between them. 

Difference Between 275/40ZR17 and 275/40R17 Tire Sizes

Dimensionally, 275/40ZR17and 275/40R17 and P275/40R17 are identical: 275 mm section width, 40-series aspect ratio, 17-inch rim, 25.7″ overall diameter, 9.0 - 11.0″ approved rim width. The ZR carries no physical specification. 

275/40ZR17and 275/40R17 and P275/40R17 size variations can be interpreted as follows: 

• “P” indicates a P-metric tire using North American load rating standards
•  275/40R17 size without the prefix (P) typically follows Euro-metric standards
• “ZR” signals high-speed tire construction. 

All 275/40ZR17, 275/40R17, and P275/40R17 share the same dimensions, but load rating systems and speed classification can differ.