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SRAM Spectro P5[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 33 14 14 57 1 0.633   19/30  
2 24 21 14 57 1 0.781   57/73 1.233
3 24 21 14 57 2 1.000 1        1.281
4 24 21 14 57 3 1.281 1  16/57 1.281
5 33 14 14 57 3 1.579 1  11/19 1.233

[1]
John Allen:
Ratios and sun-gear tooth counts are from SRAM literature; other numbers follow from these.