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| Sturmey T,TB,TBC,TBF,TBFC,TF[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 | 20 | 20 | 20 | 60 | 1 | 0.750 | 3/4 | ||
| 2 | 20 | 20 | 20 | 60 | 2 | 1.000 | 1 | 1.333 | |