Falken Azenis FK520 is a summer tyre made in total of 128 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 255/40 R17 is 50mm wider than the narrowest dimension (205) and 70mm narrower than the widest one (325). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R17, 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 (255/40 R17)

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

| Name | |||||||
|---|---|---|---|---|---|---|---|
| Falken Azenis FK520 | |||||||
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| # | Name | Our rating | Tested in this dimension | Tested in same width dimension | Segment | Price |
|---|---|---|---|---|---|---|
| 1. | Kumho Ecsta PS71 | Upper-middle | £109 94 W + 1 | |||
| 2. | Continental PremiumContact 6! Newer model available: Continental PremiumContact 7 | Premium | £184 94 W + 1 | |||
| 3. | Firestone Roadhawk 2 | Upper-middle | £114 98 Y | |||
| 4. | Falken Azenis FK520 | Upper-middle | £126 98 Y | |||
| 5. | Fulda SportControl 2 | Lowcost |