For 27.5 "(650B), the DeFender XC11 is a lightweight removable rear fender offering exceptional mud/splash protection. The different pivots of the fender will allow you to adjust perfectly to any bike while the clamping ring will fit seatposts from 25,4 to 34,9 mm in diameter. The plastic has a flexible edge for better impact resistance, the underside is polished to prevent mud build-up and make cleaning easier. For 27.5" (650B) / rear 215 g