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 27.5in mountain bikes with a maximum tyre width of 2.6in and features stylish and practical details like shiny icon details, the ACID adapter system and an integrated light cable guide. The mudguards are compatible with our ACID rear light integration. BB-Mount: The mudguard is mounted to the Bottombracket. ST-Mount: The mudguard in short design is mounted to the seat tube with an adapter.