The braking surface of the wheel rim is frequently a magnet for foreign matter. A build up of debris will impair braking performance, as well as coating the fork and even the downtube in road grime whenever pad connects with rim. Removing surface debris with a rag is a simple matter that can easily be included in a routine of pre-ride checks. A more thorough clean is likely to form part of a post-ride routine, and if the brake track is alloy, a scourer can be used to clean the surface (Mavic make a ‘soft stone’ rubber block specifically for the purpose). Alternatively, cleaning agents designed for bicycle disc brakes, such as Juice Lubes’ Brake Juice, sprayed on to a rag and then applied to the rim, can be effective on alloy brake tracks.

While inspecting the brake track, take a close look at the manufacturer’s wear indicators. The wheel is part of the stopping mechanism in rim brake systems (not so with disc brakes – one of their many claimed advantages) and so subject to continual wear. Failure in any part of the wheel can be catastrophic. Wear indicator checks can be periodic, rather than made before every outing, but if they’re part of your pre-ride routine, so much the better. Finally, check the brake pads. Grit and debris on the pad surface can impair braking and make a horrible mess of your lovely high-end wheelset.