Sks velo 42 urban mudguard set are very versatile no matter where you are in the city the woods or the fields the sks velo 42 urban is the ideal companion to keep you dirt free and dry the 28 snap on mudguard set can be mounted to frame tubes of 25 to 35 mm diameter for an extra secure mounting of the rear mudguard a 34 mm stainless steel u stay is available as an optional accessory