195/40R17 Tire Size

All You Need to Know About 195/40R17 Tires

195/40R17 tires are 195 mm wide, with a 40% aspect ratio and a 17-inch wheel diameter, producing an overall diameter of 23.1 inches and a sidewall height of 3.1 inches.

The 195/40R17 occupies a narrow, very low-profile niche - a compact section width combined with a short 40-series sidewall on a 17-inch rim. The overall diameter of 23.1 inches is among the smallest achievable in a 17-inch format, which means this size is selected for its visual and handling characteristics rather than clearance or comfort. Sidewall compliance is minimal, steering feedback is sharp, and the tire's character is strongly biased toward sporting response at the expense of ride softness.

Compared to the 195/45R17, the 195/40R17 is ≈0.77 inches shorter in overall diameter - a 3.3% difference that slightly exceeds the conventional ±3% interchangeability guideline, meaning these two sizes should not be treated as direct replacements despite sharing the same section width. Against the wider 205/40R17, overall diameter increases by only ≈0.32 inches (≈1.4%), making it the closer reference if a slightly broader footprint is acceptable.

195/40R17 Size Quick Specs

• Approved rim width range: 6.5-7.5"
• Measured Rim Width: Typically 6.5" or 7.0"
• Width: 195 mm
• Sidewall height: 78.0 mm
• Overall diameter: 23.1"
• Wheel diameter: 17 in

Note: The calculated overall diameter of 195/40R17 is ≈23.1 inches. Manufacturer differences in casing construction alter this slightly. Mounting on rims at the extremes of the 6.5-7.5" approved range affects measured section width and sidewall stance. Learn more about Rim Width Ranges and Limits.

195/40R17 Common Vehicle Fitment

195/40R17 is an extremely low-profile compact size that fits a specific category of small, lightweight performance cars and sport-tuned subcompacts where a 17-inch wheel is paired with a narrow section. Vehicles that can typically accommodate this size include:

• Honda Civic Si (2006-2011, select trim and wheel configurations where 17-inch wheels are fitted)
• Mazda 3 (2004-2009, sport trims with 17-inch alloy packages)
• Volkswagen Golf and GTI (Mk4 and Mk5 generations, on narrower 17-inch wheel setups)
• Mini Cooper S (select builds running 17-inch wheels with narrowed tire widths for autocross or winter use)

Because 195/40R17 produces an overall diameter of only 23.1 inches, fitment on any platform needs to account for the significant drop in rolling circumference relative to most stock sizes in this vehicle class. Speedometer calibration, brake bias, and wheel well clearance relative to suspension droop should all be confirmed before installation. This size is most commonly selected for dedicated sport or track-oriented builds rather than general street replacement use.

195/40R17 Dimensions in Inches

The 195/40R17 tire size measures approximately 7.7 inches in width, 23.1 inches in overall diameter, and has a sidewall height of about 3.1 inches.

What defines 195/40R17 within its narrow segment is the very short sidewall relative to the rim diameter. At only 3.1 inches between bead and tread, the casing has almost no vertical flex available. On smooth surfaces, this translates into precise steering response and minimal lateral squirm; on deteriorated roads, it means vibration and impact harshness are transmitted through the chassis with very little cushioning. This tradeoff characterizes every extreme low-profile size and is especially pronounced in the narrow 195/40 configuration, where the rim diameter constitutes the dominant share of overall tire height.

195/40R17 in Inches: All Measurements

• Overall diameter: ≈23.1"
• Width: 7.7"
• Sidewall height: 3.1"
• Wheel diameter: 17"
• Circumference: ≈72.7"

Most Recommended 195/40R17 Tires

Best tires in 195/40R17 size include:

• 195/40R17 ultra-high performance summer tires:
• Performance all-season tires 195/40R17:
• 195/40R17 sport compact options:
• 195/40R17 set of 4:

Comparison of 195/40R17 With Similar Tire Sizes

195/40R17 is best understood in relation to the 195/45R17 as its taller, same-width alternative and the 205/40R17 as a wider option with a nearly identical overall diameter.

Difference Between 195/40R17 and 195/45R17 Tire Sizes

The 195/45R17 is taller while maintaining the same section width:

• Width: identical at 195 mm
• Overall diameter:  195/45R17 is ≈0.77 inches (≈3.3%) larger than 195/40R17

This difference between 195/45R17 and 195/40R17 slightly exceeds the ±3% interchangeability threshold. The additional sidewall height meaningfully changes ride character and raises rolling circumference enough to affect speedometer accuracy - verifying compatibility is necessary before substituting one for the other.

Difference Between 195/40R17 and 205/40R17 Tire Sizes

The 205/40R17 is wider and marginally taller:

• Width: 205/40R17 is 10 mm wider
• Overall diameter:  205/40R17 is ≈0.32 inches (≈1.4%) larger than 195/40R17

205/40R17 and 195/40R17 sizes are generally interchangeable from a diameter standpoint, staying well within the ±3% range. The width change expands the contact patch while adding minimal height, which is often acceptable on rims designed for either size. Before making any switch, it is worth understanding how the 3% rule works in practice and what other factors to verify when changing tire size.