ENDURO-PRO CHAIN ADJUSTER

Take the guesswork out of adjusting your bike chain slack. Adjusting your chain slack is rarely done correctly. A chain that is too tight will put a strain on the chain and sprocket, resulting in a broken chain at a minimum. A chain that is too loose will slap around and wear out your sprocket prematurely. There is one way to make it PERFECT, use the Chain Adjustment Block.