index shifting differently in the cold
I noticed with the bike I've been commuting on that the cold affects how it shifts. It wasn't shifting perfectly... there was always some gears that would try to shift on their own when I used them. I think it was because of a bent derailer hanger. But on cold mornings it would shift perfectly!
I recently bought another bike that I am getting tweaked how I want it. It shifts great. But this morning (cold) it was trying to shift out of the gear it was in.
Is this because the cables expand/contract with the temperature change? Is there a way to compensate for this?
I live in south Texas, so it doesn't get really cold but it also doesn't stay cold. So I can't have a winter and summer setup. The temperature tomorrow might be back to blazing hot...
Thanks for advice!
strings' tension changes due to temperature -- bike cables, too!
[QUOTE=BarracksSi;13515898] Musicians who play stringed instruments know that the :)(ambient air temperature, or bright stage lights, etc), and it goes far enough to throw the instrument out of tune.
The cold weather here in northern NH (-5F-20F) causes derailleur problems, incomplete shifting, de-chaining, I now realize from reading this and other cold weather biking forums.
Whether the frame, the cable and the derailleur all contract, or what ... all four of the mountain bikes I use have difficulties. I commute over icy, snowy, sandy, gravelly streets and sidewalks, flat-terrain thankfully in this mountain valley. I thought I was losing my mind or my mechanical ability after carefully adjusting the derailleurs in my 70F kitchen at night, only to then have a de-chaining less than a block from the house the next morning.
The auto-bike (autmatic transmission) I can use only when the temps are above 27F, otherwise she throws herself into neutral, and you have to walk home once she gets cold. Pity, since hers are the most agressive tires.
Sometimes, on the 29 Mantis Colosus I can hold the cable tension to a point where it shifts without slipping, put that is a hassle.
Thanks for this forum!