A2
| Design of wheels (rims) |
| 1 - | Wheel flange |
| q | Stop for tyre bead (side) |
| 2 - | Hump (H2) on both bead seats |
| q | Prevents tyre from slipping off bead seat during hard cornering |
| q | Extended hump (EH2) is mandatory when using run-flat tyres |
| 3 - | Well base |
| q | Facilitates mounting of tyre |
| A - | Rim width |
| q | Distance between tyre contact surfaces at the two wheel flanges |
| q | Dimensions given in inches |
| B - | Rim diameter |
| q | Distance between tyre contact surfaces on opposite tyre shoulders |
| q | Dimensions given in inches |
| t | 1 inch = 2.54 cm (25.4 mm) |
| t | 1 cm = 0.394 inches |
| C - | Rim offset → Chapter |
| q | Distance between vertical centre line of wheel and inner mounting face |
| q | Dimensions given in mm |
| D - | Bolt hole circle diameter → Chapter |
| q | Diameter of circle of holes for wheel bolts |
| q | Dimensions given in mm |
| E - | Centre hole, hub diameter → Chapter |
| q | For centring |
| q | Dimensions given in mm |
