The overall experience of the SC7 is quite good, but when the temperature drops to around 18 degrees Celsius, coupled with light rain and wet ground, the confidence one feels when driving at high speeds through corners is not very strong.
255/45 R21 Tyres
Everything we know about the 255/45 R21 tyre size: 3 owner reviews covering 42,613 miles of driving, and EU label data for the tyres you can actually buy in it.
- 3owner reviews
- 42,613 milescovered on them
- 61tyres made in this size
255/45 R21 EU tyre label data
EU label values are declared for each individual size, so the figures here are exact for 255/45 R21 rather than a range across a model. 55 tyres carry label data in this size. The most common load index is 106 (up to 950 kg per tyre). Speed ratings on offer: (Y) (301 km/h), Y (300 km/h), W (270 km/h), V (240 km/h), H (210 km/h), T (190 km/h), S (180 km/h). 24 tyres in this size carry the 3PMSF severe snow marking.
A Best wet grip
20 tyres in this size hold the top EU wet grip rating, class A. The highest scoring on Tyre Reviews:
- Pirelli P Zero Winter 2 Winter 9.8
- Continental SportContact 7 Summer 9.7
- Goodyear Eagle F1 Asymmetric 6 Summer 9.7
- Continental Sport Contact 6 Summer 9.3
- Michelin Pilot Sport 4 SUV Summer 9.3
- Pirelli Scorpion Winter 2 Winter 9.3
A Lowest rolling resistance
The most fuel efficient choice: 10 tyres in this size reach rolling resistance class A. The highest scoring on Tyre Reviews:
- Continental SportContact 7 Summer 9.7
- Pirelli Scorpion Summer 9
- Pirelli P Zero Summer 8.8
- Hankook iON evo SUV Summer 8.5
- Michelin Pilot Sport 5 Energy Summer 8.5
- Michelin Pilot Sport EV Summer 8.2
68dB Quietest tyres
The quietest 255/45 R21 tyres are labelled at 68 dB external noise:
- Giti Control P10 Summer 8.5
- Hankook iON evo SUV Summer 8.5
- Goodyear Eagle F1 Asymmetric 3 SUV Summer 8.4
Label values come from the EU EPREL database and apply to the EU market versions of each tyre. Wet grip and rolling resistance run from class A (best) to E; noise is the measured drive-by figure. A good label is a floor, not a verdict - the tests and owner ratings above tell you far more.
What does 255/45 R21 mean?
A 255/45 R21 tyre is 255 mm wide, its sidewall is 45% of that width (115 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 763 mm.
| Section width | 255 mm |
|---|---|
| Sidewall height | 115 mm |
| Rim diameter | 21" (533 mm) |
| Overall diameter | ≈ 763 mm |
| Circumference | ≈ 2,397 mm |
| Revolutions per km | ≈ 417 |
| Revolutions per mile | ≈ 671 |
Also written as
255/45R21 255/45 ZR21 255-45-21 255 45 21
Figures are calculated from the nominal size. A loaded, rolling tyre runs a few percent smaller, and true widths vary slightly between makes.
What cars use 255/45 R21 tyres?
The cars most often running this size in our owner reviews. Each links to the best rated tyres for that exact car.
What drivers say about their 255/45 R21 tyres
The most recent owner reviews fitted in this size, in their own words.
My car is a Luxeed R7, weighing 2.3 tons and with 17,000 kilometers on it. It's rear-wheel drive and has a horsepower of just over 300. At that power, it tends to slip in corners. Its grip is the worst of any Michelin tire I've ever used. My biggest complaint about this tire is its wet grip, which is extremely poor and lacks any confidence. Comfort and quietness are decent, though. But considering it costs only 2,000 RMB, while a Continental SC6 only costs 1,800 RMB and a Pirelli PZero E only 1,200 RMB, the Michelin PSEV offers a very poor value for money. I won't consider it again for my next tire change.
Had as OEM on Volvo XC60 Recharge- never great, but with 5/32 left and 26k miles hydroplaning was scary. Hate that foam means even minor puncture is difficult to repair - replaced with Michelin Cross Climate 2 which appear nearly as quiet without foam and do not slip as much with aggressive acceleration
Drive on 255/45 R21 tyres?
Review your tyres 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 tyre, the size and the distance covered, and are checked by hand before publication. Test results come from independent published tyre tests indexed by size, and label values from the EU EPREL database.
About the TR Score
The Tyre Reviews Score rates each tyre 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 Tyre Reviews test is run by Jonathan Benson, who has been testing tyres independently since 2007.