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| Sturmey S2 2--speed[1] | ||||||||
| Number of gear teeth | ||||||||
| Gear | Sun Gear 1 | Pinion to Sun 1 | Pinion to Ring 1 | Ring gear 1 | Path, 1=R to P, 2=Direct, 3=P to R | Gear Drive Ratio | Drive ratio as fraction | Ratio incre- ment |
| 1 | 24 | 18 | 18[2] | 60 | 1 | 0.714 | 5/7 | |
| 2 | 24 | 18 | 18 | 60 | 2 | 1.000 | 1 | 1.400 |