Ass Saver's Regular saddle mudguard keeps your butt free of water and road dirt in all kinds of weather. This guard is suitable for the daily commute to work aswell as protecting your butt in the weekend race series. Easy installation with no tools required. New patented FLIP-TIP attachment system. Compatible with all standard rail saddles and also carbon rails. Designed for tyre widths between 23-35mm. Very well suited to road and hybrid bikes.