2018 MTB / DISC Hub Dimensions
2018 MTB / DISC Hub Dimensions
Product Codes:
HB4FD18, HB8FD18, HB8FD18B (Front)
HB4RD18, HB8RD18, HB8RD18B (Rear)
| Front | Front | Front | |
| HB4FD18 | HB8FD18 | HB8FD18B | |
| A - Hub Center To Flange Center, Left Side (mm) | 34.9 | 34.9 | 39.6 |
| B - Hub Center To Flange Center, Right Side (mm) | 23.3 | 23.3 | 27.6 |
| C - Axle Width (mm) O.L.D. | 100 | 100 | 110 |
| Spoke Hole Circle Diameter, Left Side (mm) | 56 | 56 | 57 |
| Spoke Hole Circle Diameter, Right Side (mm) | 37 | 37 | 43 |
| Spoke Hole Counts Available | 24 | 28 | 28 |
| Rear | Rear | Rear | |
| HB4RD18 | HB8RD18 | HB8RD18B | |
| A - Hub Center To Flange Center, Left Side (mm) | 32.85 | 32.85 | 37.8 |
| B - Hub Center To Flange Center, Right Side (mm) | 21.85 | 21.85 | 22.4 |
| C - Axle Width (mm) O.L.D. | 135/142 | 135/142 | 148 |
| Spoke Hole Circle Diameter, Left Side (mm) | 51 | 51 | 44 |
| Spoke Hole Circle Diameter, Right Side (mm) | 56 | 56 | 57 |
| Spoke Hole Counts Available | 24 | 28 | 28 |
Bearing Details
| Hubshell | Cassette Body | I.D. | O.D. | |
| Front: HB4FD18, HB8FD18 | 17287 x 2 | 17mm | 28mm | |
| Front: HB8FD18B | 6804 x 4 | 20mm | 32mm | |
| Rear: HB4RD18, HB8RD18, HB8RD18B | 6902 x 2 | 6802 | 15mm | 24mm |
| 6902 | 15mm | 28mm |