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Sachs Super 7, SRAM Spectro S7 (coaster, drum brake, no brake, I-brake)[1] | ||||||||
Number of gear teeth | Drive path | Ratios | ||||||
Shifter Position | Sun Gear 1 | Pinion meshing with sun | Pinion meshing with ring | Ring gear | 1=R to P, 2=Direct, 3=P to R | Drive ratio as fraction | Drive ratio | Ratio incre- ment |
1 | 33 | 12 | 17 | 63 | 1 | 252/439 | 0.574 | |
2 | 30 | 17 | 17 | 63 | 1 | 21/31 | 0.677 | 1.180 |
3 | 21 | 24 | 17 | 63 | 1 | 72/89 | 0.809 | 1.194 |
4 | 21 | 24 | 17 | 63 | 2 | 1 | 1.000 | 1.236 |
5 | 21 | 24 | 17 | 63 | 3 | 1 17/72 | 1.236 | 1.236 |
6 | 30 | 17 | 17 | 63 | 3 | 1 10/21 | 1.476 | 1.194 |
7 | 33 | 12 | 17 | 63 | 3 | 1 187/252 | 1.742 | 1.180 |