Falken Azenis FK520 is a summer tyre made in total of 128 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/35 R21 is 50mm wider than the narrowest dimension (205) and 70mm narrower than the widest one (325). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height. In 255/35 R21, there is only one possible speed index for Falken Azenis FK520 - "Y", which is good for speeds up to 300 km/h.
Relevant tyre tests in same or similiar dimension (255/35 R21)

| Name | Wet | Dry | Offroad | ||||
|---|---|---|---|---|---|---|---|
| Best values in test | 1- | 2+ | 2 | ||||
| Falken Azenis FK520 | 2+ | 2+ | 2 | ||||
| Show test details | |||||||

| Name | |||||||
|---|---|---|---|---|---|---|---|
| Falken Azenis FK520 | |||||||
| Show test details | |||||||
| # | Name | Our rating | Tested in this dimension | Tested in same width dimension | Segment | Price |
|---|---|---|---|---|---|---|
| 1. | Continental SportContact 7 | Premium | £255 98 Y | |||
| 2. | Michelin Pilot Sport 4 S! Newer model available: Michelin Pilot Sport S 5 | Premium | £342 98 Y | |||
| 3. | Michelin PILOT SPORT 5 | Premium | £318 98 W + 2 | |||
| 4. | Goodyear Eagle F1 Asymmetric 6 | Premium | £213 98 Y + 1 | |||
| 5. | Pirelli P ZERO PZ4 | Premium | £276 98 W + 4 | |||
| 6. | Hankook iON evo | Premium | £254 98 W | |||
| 7. | Bridgestone Turanza T005! Newer model available: Bridgestone Turanza 6 | Premium | £266 98 Y + 1 | |||
| 8. | Kumho Ecsta PS71 | Upper-middle | £242 98 Y | |||
| 9. | Hankook Ventus S1 evo3 K127 | Premium | £222 98 Y | |||
| 10. | Kumho Ecsta Sport (PS72) | Upper-middle | £250 98 Y + 2 | |||
| 11. | Bridgestone Turanza 6 | Premium | £241 98 Y | |||
| 12. | Hankook Ventus S1 evo3 SUV K127A | Premium | £221 98 Y | |||
| 13. | Firestone ROADHAWK 2 | Upper-middle | £219 98 Y | |||
| 14. | Goodyear Eagle F1 Supersport | Premium | £230 98 Y | |||
| 15. | Vredestein Ultrac Pro | Premium | £221 0 | |||
| 16. | Nokian Powerproof 2 | Upper-middle | £254 0 Y + 1 |