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Bike Transmissions - Reference
Below is a reference table which shows the standard calculations for a few known bikes.
See Gear Ratios Document

  Upd  Title  Front  Rear  LowGear  HighGear  Range  TireD  LowInch  HighInch
    Search Term       SortOrder
TitleFrontRearLowGearHighGearRangeTireDLowInchHighInch
Masi Giramondo44/32/2211-360.614.0656%2716108
Rocky Mountain (Robin) 199342/32/2212-320.693.5507%261891
Yellow Brodie (Betsy)42/34/2211-320.693.8551%261899
Trek 520 Large Size48/36/2611-360.724.4611%2719119
Surly Disk Trucker 202148/36/2611-340.764.4579%2721119
Devinci Stockholm (Steve)48/2811-340.824.4537%2722119
Surly LHT50/39/3011-360.834.5542%2722122
Specialized Diverge Sport (Steve G)46/3011-340.884.2477%2724113
Miyata 1000 (Robin)50/40/2814-300.933.6387%272597
Specialized Women's Comp48/3211-340.944.4468%2725119
Giant Toughroad SLR GX148/3211-340.944.4468%2725119
Trek 1.5 - Shimano 105 (BillM)50/3411-321.064.5425%2729122
Green Holdsworth (Steve)50/3214-301.073.6336%272997
SRAM Force 1 Setup4810-421.144.8421%2731130
Blue Norco (Robin)52/4013-341.184.0339%2732108
Moulton Speed (17" wheels)58/4410-301.475.8395%172599
Chris K Folding bike5812-341.714.8281%203496
Total: 17