Can anyone tell me if a sticky freewheel can be fixed? I have a Trek 7100 Multitrack with a Shimano 7 gear freewheel. The bike is only a little over a year old and I don't ride it all that much. I mainly use it for commuting around town when I need to get some place faster than walking. It may have 200 miles on it at the most so it seems to me that the freewheel should still be in good working order. The mechanic at the shop said that it needs to be replaced at a cost of about $25.00. He did offer to install it for free since I bought the bike and all my accessories from him so I was happy about that. Does anyone know if that is the going price for a Shimano 7 gear freewheel? The last time I checked the prices on bike parts was back in the 80's so it's probably about right even though it did seem a bit high. Thanks.
$25 is worth it if he's going to remove the old one for you.
Freewheels can sometimes be resurrected by flushing with solvent and re-lubing.
Look here for info on lubing.
If the bike is only a year old, you probably have a freehub rather than a freewheel. What happens is your cassette (the rear 7-gear cluster) is attached to the freehub which allows the gears backwards motion (relative to the wheel) so you can coast.
Since the mechanic reccommended a replacement, I'm guessing that your freehub is cracked. If this is indeed the case, there's really not much you can do to fix it other than pay the 25 bucks for a replacement.