Thread: My Dahon Vitesse hot rod.
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Old 06-01-09, 04:44 PM
  #13  
AEO
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well, the engine is the same, so not that different.

what's really different is the gearing range and jumps between the gears.
stock dahon uses 52T chainring with 11-30 7sp cassette on 20x1.5" (40x406mm) tires
  • gear / GI / difference
  1. 52x30 / 33.11 / 25.00%
  2. 52x24 / 41.38 / 14.29%
  3. 52x21 / 47.30 / 16.67%
  4. 52x18 / 55.18 / 20.00%
  5. 52x15 / 66.21 / 15.38%
  6. 52x13 / 76.40 / 18.18%
  7. 52x11 / 90.29 / 0.00%

compare that to 53/39 with 11-23 9sp cassette with 40x406mm
  • gear / GI / difference
  1. 39x23 / 32.39 / 9.5 %
  2. 39x21 / 35.47 / 10.5 %
  3. 39x19 / 39.21 / 11.8 %
  4. 39x17 / 43.82 / 13.3 %
  5. 39x15 / 49.66 / 7.1 %
  6. 39x14 / 53.21 / 7.7 %
  7. 39x13 / 57.30 / 8.3 %
  8. 39x12 / 62.08 / 9.1 %
  9. 39x11 / 67.72 / 0.0%
  10. 53x23 / 44.01 / 9.5 %
  11. 53x21 / 48.20 / 10.5 %
  12. 53x19 / 53.28 / 11.8 %
  13. 53x17 / 59.55 / 13.3 %
  14. 53x15 / 67.49 / 7.1 %
  15. 53x14 / 72.31 / 7.7 %
  16. 53x13 / 77.87 / 8.3 %
  17. 53x12 / 84.36 / 9.1 %
  18. 53x11 / 92.03 / 0.0%
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