| R20-R | R20-F | ||
| Weight | 340g | Weight | 135g |
| Bearing | 2SB | Bearing | 2SB |
| No.of Hole | 24/28/32 | No.of Hole | 24/28/32 |
| Spoke Hole | 14G | Spoke Hole | 14G |
| Axle System | QR/TA10/ TA12/X12 | Axle System | QR/TA10/ TA12/TA15 |
| Axle Material | 7075-T6 | Axle Material | 7075-T6 |
| P.C.D. | 49/49mm | P.C.D. | 58/45mm |
| Flange Width | 56mm | Flange Width | 58mm |
| Disc Mount | CL | Disc Mount | CL |
| Cassette | Shm11sp | ||
| Ratchet System | 3-Pawls-24T | ||
