The DeFender M1 for 26-inch wheels is compatible with all standard front forks, including those with inverted arches. The unique quick-release system allows the DeFender M1 to be perfectly integrated into the front of your bike. The DeFender M2 features an ultra-secure quick-release system that can be easily adjusted to fit diameters from 25.4 to 34.9 mm, making it suitable for both standard and oversized seat posts. The dual-joint arm provides better tire coverage and a perfect fit for the bike. The underside of the fender has been polished to prevent dirt buildup and make cleaning easier. Designed for 26-inch wheels / fenders for both front and rear.