Need your bike to be as versatile as you? The ACID Mudguard Set is just the right complement to equip you against the elements. It fits most 29in mountain bikes with a maximum tyre width of 2.35in and features stylish and practical details like glossy icon details, the ACID adapter system and an integrated lighting cable guide. The mudguards are compatible with our ACID rear light integration. BB Mount: The mudguard is mounted to the bottom bracket. ST Mount: The short-design mudguard is mounted to the seat tube with an adapter.