I have an '06 Avalanche GT with a shimano FHM475mm rear hub on it. I do some adventure racing with it and twice now after riding through creeks and rivers with the temp. below 32 degrees the rear hub has failed to disengage and therefore I can peddle but the hub free wheels. It never hooks up. I haven't taken the hub apart because I don't have the tools, but I'm wandering if anyone knows what the cause might be. I have other teammates that do the same thing and nothing happens with their hubs. I have already had GT replace the rear wheel and it has happened again already.
I suspect that somehow moisture is getting in there and when freezing it disables the pawls or whatever is in the hub from hooking up. If that is correct how do I fix this and or is there a better hub that I can get which won't do this?
Thanks in advance for your help,
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