| Shaft diameter | d | 20 | mm |
| Top width | A1 | 21 | mm |
| Overall height | H | 64.50 | mm |
| Step height | A1 | 14 | mm |
| Distance between attachment bolts | J | 97 | mm |
| Width of attachment bolt hole | N | 11.50 | mm |
| Base width | b | 32 | mm |
| Width Inner ring | B | 31 | mm |
| Spherical seat centre height | H1 | 33.30 | mm |
| Overall width | A | 127 | mm |
| Length of attachment bolt hole | N1 | 20.50 | mm |
