Rims

Signs of Wear: Your rim is worn so thin that it fails, causing the tyre to blow off, the tube to explode and the sidewall of the rim to fold outward. If you’re lucky, this will happen while you’re pumping up the tyre, not mid-ride.

Know This: Rim brakes, when exposed to gritty road grime and off-road mud, can grind down the rim’s surface.

Do This: There’s no easy fix for worn rims; replacement is the only answer. Some manufacturers machine depressions into the sidewall to serve as wear indicators. Place a straight edge against the rim; if it’s concave, it should be inspected by an experienced mechanic and will likely need to be replaced.

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