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Gear Question
Shimano America Dura-Ace Crankset - Double
i own a trek madone 5.9 superlight and am having significant...
By rlane2222688
May 19, 2008
i own a trek madone 5.9 superlight and am having significant problems with the chain coming off or riding on top of the teeth. All the components are Dura-Ace, the bike is in its third season, I replace the chain every 1200 miles, the casette looks "OK". The mechanic can't figure it out and said I had a "short crank" on the bike which he thought was standard on this bike ?? but muttered something about that being a bad design. In any avent, any ideas to help a frustrated and side=lined biker ??
View Details: Shimano America Dura-Ace Crankset - Double
By Deejayoh
May 20, 2008
Does it come off when shifting or just when riding? I can think of three possible reasons1) overshifting - which would mean it comes off when shifting onto the big ring2) worn teeth on big ring - which could result in throwing the chain while riding3) play in the bottom bracket - which seems unlikely given the design of this crankset.Length of the crank arms shouldn't make any difference at all, as far as I can see.good luck
Helpful Votes: 0 Yes | 0 No
Tech Specs:
- Material:
- [Arms] Forged anodized aluminum; [Chainrings] anodized aluminum
- Arm Length:
- 165, 167.5, 170, 172.5, 175, 177.5, 180mm
- Gearing:
- 53 x 42, 52 x 39, 53 x 39, 50 x 39, 54 x 42, 56 x 44
- Bottom Bracket:
- Integrated
- Weight:
- 740g
- Recommended Use:
- Road cycling
- Manufacturer Warranty:
- 3 Years
Change me.