How do you put a loose bike chain back on?

Why does my bike chain slip?

Chain slippage can happen when the chain is stretched or the cassette or chainring cogs are worn. In this case, the chain doesn’t align nicely on the cogs, and so when you pedal hard, the chain can slip. Chain slippage can happen when the chain is stretched or the cassette or chainring cogs are worn.

How do you tighten a loose mountain bike chain?

Insert your screwdriver into the B-tension screw. Rotate the derailleur screw counterclockwise to decrease the tension of the chain. Turn the B-tension screw clockwise to tighten the chain around the teeth of the rear sprocket. Lift the release lever of your mountain bike brakes to disconnect the correlating cable.

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