APARATORI ACID CLICK 75 Set The ACID Mudguard Set CLICK 75 fits most 27.5in, 28in and 29in bikes. Mounts to CUBE bikes using an special adapter, for other bikes a bracket is included. The mudguards are suitable for use with tyres up to a width of 2.25in.fits most 27,5", 28" and 29" bikes universally mountable with the included angle mountable on CUBE bikes with special SIC-adapter, only usable with disc brakes maximum tire width up to 2.25''