| Chain Type | No.120 | |
| Pitch | (P) | 38.10 mm |
| Internal width | (W) | 25.40 mm |
| Roller Dia. | (Dr) | 22.23 mm |
| Teeth width | (T) | 23.5 mm |
| Sprockets No. | Outside Dia.Do | Pitch Dia.Dp | Bore d | Hub | Weight(kg) | ||||
| Type | Teeth No. | Stock | min. | max. | BD | BL | |||
| EX120B | 10 | 140 | 123.29 | 20 | 22 | 51 | 78 | 56 | 3.2 |
| 11 | 153 | 135.24 | 20 | 22 | 60 | 91 | 56 | 4.0 | |
| 12 | 165 | 147.21 | 20 | 22 | 66 | 98 | 56 | 4.8 | |
| 13 | 177 | 159.20 | 20 | 22 | 66 | 98 | 56 | 5.3 | |
| 14 | 190 | 171.22 | 20 | 22 | 75 | 107 | 56 | 6.3 | |
| 15 | 202 | 183.25 | 20 | 22 | 80 | 117 | 63 | 7.8 | |
| 16 | 214 | 195.29 | 20 | 22 | 80 | 117 | 63 | 8.4 | |
| 17 | 227 | 207.35 | 20 | 22 | 80 | 117 | 63 | 9.1 | |
| 18 | 239 | 219.41 | 20 | 22 | 80 | 117 | 63 | 9.9 | |
| 19 | 251 | 231.48 | 20 | 22 | 80 | 117 | 63 | 10.7 | |
| 20 | 263 | 243.55 | 20 | 22 | 89 | 127 | 63 | 12.1 | |
| 21 | 276 | 255.63 | 20 | 22 | 89 | 127 | 63 | 13.0 | |
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