Road Bike Changes Gears when powering up hill in or out of saddle, help!?

  • Thread starter Thread starter Randy B.
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Randy B.

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My 2008 Cannondale CAAD9 R6 when going up a hill in the easiest gears possible (not switching gears at all going up hill, i stay committed on the easiest for now (highest cadence possible)) will slip out of gear when going up the hill when powering hard to pick up speed. I tried this out on a pretty steep hill a few times so I am not too crazy .... or at least i do not think. I am litterally probably only going 9-11 miles an hour up this hill when the gear will suddenly slip into a much harder gear to pedal; it almost sounds as if the previous gear was not even set and it will sound like i broke the chain but its really just slipping to a higher gear. This is very scary for me since I am quite vulnerable when committed to my pedals since im locked in and going so slow as it is to be going 9 miles an hour in an easy gear to probably 2 gears harder and 5 miles an hour and feel like im about to fall down the hill haha..... Any ideas? I am taking my bike to the LBS tomorrow but I want to be able to be more knowledgeable about my issue before i go if i even need to go?
 
i had the same issue with my bike. it is just ghost shifting probably due to cable stretch. you can fix this problem by making slight adjustments to the tension on your rear derailleur.
i would suggest adjusting the cable while in the low gear untill the chain is visibly aligned more properly with the gears, then go out and test ride it. it should be an easy fix.
 
it sounds if you need too take a few links off the chain i had the same problem and it worked for me
 
Anytime, any bike ran out of gear would slipped into the next, and the cyclist agonises with it, and is endangered with it (falling off)

Example:

The cyclist can change to the highest cassette cog (21T for mine) to accent a hill. Upon encountering uncomfortable resistance, the cyclist can change to a lower chain-ring

(48T for mine). If the chain slips with this 48T chain-ring driving 21T cassette cog gear ratio, the bike has ran out of gears ratio for that uphill climb. Some bike are equipped with triple chain-rings, so the cyclist can change further down to another lower 30T chain-ring perhaps, and climb that hill

Failing which, the cyclist either get off his saddle and do tedious stand-up cycling, or alight and push the bike uphill

You could tell the bike shop to prepare your bike for hilly cycling route, and they are likely to replace your double chain-rings with wider range triple chain-rings. Likewise, the cassette may be changed to one with a wider gear range
 
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