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This time of year, I leave my race (carbon) bike on the trainer and when nice enough, just ride my rain/wet/commuter/cx bike.

I do replace the 'race' skewer with a steel skewer for trainer use.

Will it damage the carbon if I leave the bicycle clamped and ready to train on the trainer? Should I release the clamp every time I'm done training?

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What kind of trainer is it? How is the bike attached to it? My guess is that damage is unlikely, but if it happens, it'll be from riding it on the trainer. – Mike Baranczak Dec 2 '11 at 17:19
Cyclops Fluid 2 - Yeah, I imagine the stress of riding on the trainer is more than simply leaving it mounted. – Glenn Gervais Dec 2 '11 at 17:21
Also see related question, Can using a trainer damage my bicycle. And, check with your bike manufacturer (in writing) as to whether trainers void your warranty. – James Schek Jan 16 '12 at 1:07
up vote 8 down vote accepted

cyclops fluid 2

If this is the kind you have, then leaving the bike in there should make no difference whatsoever. This trainer clamps onto the rear axle, it doesn't even touch the frame. When you're off the bike, the frame doesn't have to do anything except support its own weight - there's no possible way it could get damaged.

You're probably less likely to damage the bike, since you won't be knocking it over.

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Also, repeated unclamping/clamping is likely to be more damaging than just leaving it be. – Brian Knoblauch Dec 2 '11 at 18:15

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