24 I General User Manual18 Repairing a punctureTo repair a puncture, you will need the following equip-ment:• Plastic tyre lever• Patches• Rubber solution• Sandpaper• Spare inner tube, if required• Spare valve, if required• Open-ended spanner (if your bike is not equippedwith a quick-release device)• Tyre pumpWe recommend you remove the defective wheel first. Openor remove the brake beforehand. The procedure for thisdepends on the type of bike brake that is installed.Read the chapter on brakes before removing the brakeas otherwise you could damage the brake system andthis could lead to accidents.18.1 Opening the brake18.1.1 Opening the cantilever or V-brake› Grip the wheel with one hand.› Squeeze the brake pads or brake arms against therim.› Detach the brake cable at one of the brake arms.18.1.2 Removing the hydraulic rim brake› If quick-release brake mechanisms are fitted, re-move a brake unit (see ➠ Chapter 9.2.2 "Operatingthe quick-release device").› If no quick-release brake mechanisms are fitted,deflate the tyre.To inflate an inner tube with a Sclaverand or road valve,proceed as follows:› Unscrew the valve cap anticlockwise with yourfingers.› Unscrew the knurled nut anticlockwise.› Push the knurled nut with your finger briefly intothe valve until air escapes.› Inflate the inner tube using a suitable tyre pump.› Screw the knurled nut back down.› Screw the cap clockwise back onto the valve.Ask a specialist cycle shop for advice on which tyrepump is suitable for your valve.To inflate an inner tube with a Dunlop/Woods valve orSchrader/car valve proceed as follows:› Unscrew the valve cap anticlockwise.› Inflate the inner tube using a suitable tyre pump.› Screw the cap clockwise back onto the valve.
