Kumho Ecsta Sport (PS72) is a summer tyre made in total of 54 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/40 R21 is 40mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R21, there is only one possible speed index for Kumho Ecsta Sport (PS72) - "Y", which is good for speeds up to 300 km/h. In 245/40 R21, Ecsta Sport (PS72) usually competes against Ecsta PS71, which is a tyre from Kumho with a rating of 83%, compared to 87% of the Kumho in question.
Relevant tyre tests in same or similiar dimension (245/40 R21)

| Name | Stopping distance on dry | Stopping distance on wet | |||||
|---|---|---|---|---|---|---|---|
| Best values in test | 32.8 | 25.2 | |||||
| Kumho Ecsta Sport (PS72) | 34.4 | 27.1 | |||||
| Show test details | |||||||
| # | Name | Our rating | Tested in this dimension | Tested in same width dimension | Segment | Price |
|---|---|---|---|---|---|---|
| 1. | Hankook Ventus evo | Premium | £210 100 Y | |||
| 2. | Michelin Pilot Sport 4 S! Newer model available: Michelin Pilot Sport S 5 | Premium | £302 100 Y + 1 | |||
| 3. | Pirelli P ZERO lx. | Premium | £278 100 V + 2 | |||
| 4. | Goodyear Eagle F1 Asymmetric 6 | Premium | ||||
| 5. | Pirelli P ZERO PZ4 | Premium | £302 100 W + 1 | |||
| 6. | Hankook iON evo | Premium | £345 100 Y | |||
| 7. | Michelin PRIMACY 5 | Premium | £293 100 W | |||
| 8. | Bridgestone Turanza T005! Newer model available: Bridgestone Turanza 6 | Premium | £294 100 Y | |||
| 9. | Kumho Ecsta Sport (PS72) | Upper-middle | £208 100 Y | |||
| 10. | Kumho Ecsta PS71 | Upper-middle | £232 100 Y | |||
| 11. | Bridgestone Turanza 6 | Premium | £216 100 Y | |||
| 12. | Michelin Primacy 4+! Newer model available: Michelin Primacy 5 | Premium | £333 100 W | |||
| 13. | Continental PremiumContact 6! Newer model available: Continental PremiumContact 7 | Premium | £265 100 Y | |||
| 14. | Goodyear Eagle F1 Supersport | Premium | £237 100 Y | |||
| 15. | Yokohama Advan Sport V107 | Upper-middle | £206 100 Y |