ZTTO Aluminum Alloy Post to Flat Mount Disc Brake Adapter for Road and Mountain Bikes - 180mm Enhanced Braking PowerWith this adapter,you can upgrade to larger disc rotors (160mm or 180mm),increasing the braking surface area. Larger discs deliver greater braking force and improved responsiveness,ensuring a safer and more reliable ride,even in challenging terrains or high-speed descents Versatile Brake Adapter for Multiple BikesIt is specifically designed to fit road bike clamp hole spacing of 34mm and mountain bike clamp hole spacing of 74mm,offering precision compatibility with different bike types Durable Aluminum Alloy ConstructionMade from high-strength aluminum alloy,this adapter is both lightweight and highly durable,offering long-term resistance to wear and tear. The material provides the ideal balance of strength and practicality for rigorous biking activities Front and Rear Wheel CompatibilityDesigned for use on both front and rear wheels,this adapter ensures flexibility and practicality for riders looking to optimize their braking system on different bike setups Important NotePlease note that road bike and mountain bike disc brake mounting standards differ significantly,so the adapter cannot be interchanged Package included: 1 x Disc Brake Adapter 2 x Long Screw 2 x Short Screw