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Cold affect Shifting in Mechanical Groupset?

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Cold affect Shifting in Mechanical Groupset?

Old 10-23-17, 08:19 AM
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alfordjo
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Cold affect Shifting in Mechanical Groupset?

I went on a ride yesterday morning...started out about 30 degrees F.

When trying to shift the rear derailleur to smaller cogs most of the time it was like I was was already in the smallest cog. Then the next try it would shift. Moving to larger cogs was not a problem.

After it warmed up a bit (40s or so) everything seemed to work fine?

I don't see how temperature would have anything to do with it, but I am not sure.
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Old 10-23-17, 08:20 AM
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trailangel
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Wax Chain lube doesn't work well below freezing point.
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Old 10-23-17, 08:21 AM
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Juan Foote
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..or water in cable
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Old 10-23-17, 08:44 AM
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Gunk gets stiffer in the cold. Moving to smaller in the rear just uses the spring tension, moving up you are pushing the cable, so this is indeed mostly noted when moving down the cassette.
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Old 10-23-17, 08:52 AM
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Originally Posted by alfordjo View Post
I don't see how temperature would have anything to do with it, but I am not sure.
When is the last time you lubricated the pivots/linkages on your RD, and what did you use as a lubricant?
How long has the rear shift cable been on the bike, and how many miles has it been since it was maintained?

If you do not have the answers to either of those questions, then you know why your cold weather shifting is slow.
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Old 10-23-17, 09:05 AM
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Originally Posted by DrIsotope View Post
When is the last time you lubricated the pivots/linkages on your RD, and what did you use as a lubricant?
How long has the rear shift cable been on the bike, and how many miles has it been since it was maintained?

If you do not have the answers to either of those questions, then you know why your cold weather shifting is slow.


In addition, make sure you're using oil on the cables (especially the rder cable) instead of grease. Grease can stiffen and "grab" the cable when you want it to slide.


Hmm, and what did I use on those new cables a few weeks ago? Grease??
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Old 10-23-17, 09:08 AM
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Any oil or good inside the cables thickens as it cools, and so can be too much for the RD return spring. You don't have a problem down shifting because your strong enough so that a bit of grease stiffness doesn't matter.
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Old 10-23-17, 10:22 AM
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Sounds like I need to make sure everything is clean. It has been probably 1k miles since I did a thorough cleaning.
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