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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  Keywords  Front  Rear  LowRatio  HighRatio  ChainS  Range  TireD  LowInch  HighInch
    Search Term       SortOrder
TitleKeywordsFrontRearLowRatioHighRatioChainSRangeTireDLowInchHighInch
Low Gear Gravel Bike (Hypothetical) 36/2211-360.613.339541%271689
Masi Giramondo 44/32/2211-360.614.047656%2716108
Custom 9.36 Opus Extreme 42/32/2211-360.613.845623%2716103
Nisiki Touring (Bob Saunders)Friends, Bob Saunders42/32/2212-340.653.542538%261791
Miyata 1000 with Mtn CrankFriends42/32/2211-340.653.843585%2718103
Custom 9.34 (Opus) 42/32/2211-340.653.843585%2718103
Custom 8.34 42/32/2211-340.653.843585%2718103
Rocky Mountain Modified 2010Friends42/32/2212-320.693.540507%261891
Brodie Quantum (Yellow, Betsy)Friends42/34/2211-320.693.841551%261899
Custom 48/38/2811-420.674.451657%2718119
Custom 9.32 42/32/2211-320.693.841551%2719103
Custom 8.32 (Brodie) 42/32/2211-320.693.841551%2719103
Specialized Diverge (low front, rear) 46/3011-420.714.247592%2719113
Trek 520 Large Size 48/36/2611-360.724.447611%2719119
Specialized Diverge (Maria)Friends48/3211-420.764.447579%2721119
Devinci Stockholm (Steve)Friends48/36/2611-340.764.445579%2721119
Surly Disk Trucker 2021 48/36/2611-340.764.445579%2721119
Custom 48/38/2811-360.784.445564%2721119
Moulton (Jacques B)Friends56/44/3411-271.265.138405%16.792186
Trek Domane SL5 (Maria)Friends50/3411-420.814.547556%2722122
Miyata 1000 (Sugino, 8spFriends50/40/2811-340.824.545549%2722122
Opus Legato (Betsy)Friends48/38/2811-340.824.443537%2722119
Surly LHT 50/39/3011-360.834.545542%2722122
Brodie Elan with 36 tooth cassette 46/3011-360.834.241506%2722113
Rocky Mountain 1993 OriginalFriends48/38/2812-320.884.040455%2623104
Brodie Roam 2020 46/3011-340.884.239477%2724113
Brodie Elan (Standard) 2021 46/3011-340.884.239477%2724113
Specialized Diverge Sport (Steve)Friends46/3011-340.884.239477%2724113
Moulton Speed (17" wheels) 58/4410-301.475.834395%172599
Miyata 1000 5 sp Original (Robin)Friends50/40/2814-300.933.638387%272597
Specialized Women's CompFriends48/3211-340.944.439468%2725119
Giant Toughroad SLR GX1 48/3211-340.944.439468%2725119
Rocky Mountain Solo 4011-420.953.631379%272697
Diverge 2022 AudreyFriends, Audrey50/3411-341.004.539450%2727122
Custom Wolf 52/3814-381.003.738370%2727100
Brodie Romulus 50/3411-341.004.539450%2727122
Trek 1.5 - Shimano 105 (BillM) 50/3411-321.064.537425%2729122
Green Holdsworth (Steve)Friends50/3214-301.073.634336%272997
SRAM Force 1 Setup 4810-421.144.832421%2731130
Blue Norco (RobinFriends52/4013-341.184.033339%2732108
Chris K Folding bike 5812-341.714.822281%203496
Norco Road Original 52/4014-261.543.724240%2742100
Brompton 6HR (has internal hub) 50163.133.1null99%165050
Total: 43