Gripmax SureGrip Pro Sport is a summer tyre made in total of 93 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/30 R21 is 50mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (295). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (255mm), which results in 76.5mm sidewall height. In 255/30 R21, there is only one possible speed index for Gripmax SureGrip Pro Sport - "Y", which is good for speeds up to 300 km/h.
| # | Name | Our rating | Tested in this dimension | Tested in same width dimension | Segment | Price |
|---|---|---|---|---|---|---|
| 1. | Continental SportContact 7 | 86%
93.3%
78.5%
| Premium | £248 93 Y | ||
| 2. | Michelin Pilot Sport 4 S! Newer model available: Michelin Pilot Sport S 5 | 76.8%
85%
76.3%
| Premium | £298 93 Y | ||
| 3. | Hankook Ventus S1 evo3 K127 | 81.4%
83.1%
78.4%
| Premium | £231 93 Y | ||
| 4. | Goodyear Eagle F1 Supersport | 79.8%
68.4%
77.1%
| Premium | £236 93 Y |
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