Each wheel hardness has been designed to adapt to a type of surface based on whether it is smooth or rough.
In general:
- The softer the wheel (or the lower the “Shore” hardness number), the greater the grip and the slightly less smoothness.
- The harder the wheel (or the higher the “Shore” hardness number), the smoother the ride and the slightly less grip.
The following table shows the type of surface suggested for each wheel hardness.
| ZERO 82 | ZERO 86 |
Slippery surfaces in general, preferably wood or polished parquet. Indoors only. |
Moderately slippery surfaces, smooth concrete or quartzite. Moderate outdoor use. Avoid very rough surfaces (asphalt) or uneven surfaces (tiles). |