If the chainrings wobble side to side, that can throw the chain off, too. An eccentric bottom bracket tightens the chain on the pedal side. As long as you stop spinning, you shouldnt be able to damage your frame or. It's free, and has received positive reviews.Īkron, OH Atlanta Austin Australia Baltimore Bay Area Boise Boston Buffalo Chicago Carolinas Colorado Columbus, OH Dallas-Fort Worth DC Delaware Detroit Edmonton Grand Rapids Halifax Hawaii Houston Indiana Ireland Leeds London Los Angeles Louisiana Madison Manchester Miami Milwaukee MO Montreal Nashville NYC Oklahoma City Omaha Ottawa Philadelphia Pittsburgh Portland Richmond Rochester Sacramento Salt Lake City San Antonio Scotland Seattle SoCal St. If you are unable to rotate into a position where the chain is adequately tensioned, it may be too long. If the chain is too short, this shift is difficult to make and the derailleur. If the chain is too long and has too much slack, you will probably need to. You should also see two slight bends at each jockey wheel of the rear derailleur. New to cycling? One of our moderators wrote a book that will answer most of your questions. Theres nothing more frustrating than a mountain bike chain that keeps coming. Wait too long and youll end up needing to replace both your chain and half your drivetrain, costing you. Ask us your questions or meet up with other redditors in your area for local rides. All bike chains are designed to be replaced. Interested in riding a bicycle? We welcome bicyclists of all skill levels including those who don't yet own a bike.