Lowsided on wet road, totaled the bike. Felt like it was a good tire until it wasn't. This tire cost me more than any other tire would. Wasn't going fast, but it was still to fast for this tire.
170/40 R17 Tires
Everything we know about the 170/40 R17 tire size: 1 owner reviews covering 7,000 miles of driving, and EU label data for the tires you can actually buy in it.
- 1owner reviews
- 7,000 milescovered on them
What does 170/40 R17 mean?
A 170/40 R17 tire is 170 mm wide, its sidewall is 40% of that width (68 mm) tall, and it fits a 17 inch wheel. That gives an overall diameter of roughly 568 mm.
| Section width | 170 mm |
|---|---|
| Sidewall height | 68 mm |
| Rim diameter | 17" (432 mm) |
| Overall diameter | ≈ 568 mm |
| Circumference | ≈ 1,784 mm |
| Revolutions per km | ≈ 561 |
| Revolutions per mile | ≈ 902 |
Also written as
170/40R17 170/40 ZR17 170-40-17 170 40 17
Figures are calculated from the nominal size. A loaded, rolling tire runs a few percent smaller, and true widths vary slightly between makes.
What cars use 170/40 R17 tires?
The cars most often running this size in our owner reviews. Each links to the best rated tires for that exact car.
What drivers say about their 170/40 R17 tires
The most recent owner reviews fitted in this size, in their own words.
Drive on 170/40 R17 tires?
Review your tires and help the next driver choose. It takes about five minutes, and every review on this page came from a driver who took them.
Where this data comes from
Owner ratings are submitted through the review form on this site, naming the tire, the size and the distance covered, and are checked by hand before publication. Test results come from independent published tire tests indexed by size, and label values from the EU EPREL database.
About the TR Score
The Tire Reviews Score rates each tire out of 10 using independent test results and the full body of owner reviews, so you can check a car-specific ranking against the wider evidence.
Who does the testing
Every test published as a Tire Reviews test is run by Jonathan Benson, who has been testing tires independently since 2007.