The new A4 Calipers are a chonky meatball of phenominal cosmic stopping power. As such they wont mate with standard Shimano brake adaptors. Pick one of these up so you can run your big fatty 223 rotor on your Zeb and save yourself 15 mins staring at your hands wondering if its you and not the shimano adaptor thats the problem.
Stock Shimano adapters don't fit those hot new A4's.
Remember to grab one of these during purchase and save yourself a second trip to the LBS.
Works great with my new A4 brakes. Shimano adapters didn't work unfortunately.
Works as advertised for my hayes A4's. Affordable as well. No complaints
If you purchase Hayes A4's, you have to use their adapters. Well made and easy-peesy to install. These A4's a AMAZING!