| Compound | Description |
|---|---|
| K10/11 | Extra soft-wet or for low ambient temperatures in tarmac rallying |
| K20/21 | Soft-wet for damp stages or for lightly loaded axles on dry surfaces |
| K30 | Soft compound gravel tyres for low ambient temperatures or wet conditions |
| K40 | Medium compound for single seater formulae |
| K45 | Medium/hard compound for single seater formulae |
| K50 | Medium compound for short races or rallycross |
| K60 | Medium compound for circuit and tarmac rallying |
| K70 | Medium compound for gravel rallying |
| K80 | Medium/hard compound for circuit use |
| K90 | Hard compound for circuit, or tarmac and gravel rallying |