If your gears are jumping or you're having difficulty shifting, your jockey wheels may need changing.
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The jockey wheels on your rear mech may wear out if you regularly ride in wet conditions or if you're on a mountain bike. Although worn jockey wheels won't necessarily damage your drivetrain, it will work better if you replace them with new ones. Replacing jockey wheels doesn't have to be a functional job - you can replace them with coloured ones to match the colour scheme on your bike.
Daniel Lloyd takes you through how to change your jockey wheels. It's a simple job needing just one tool - the correct size allen key.
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