Wheels Manufacturing Derailleur Hanger - 499 MFPN=00.4020.557.000 The Ancora Expansion Plug is

The Ancora Expansion Plug is designed for use with carbon steerer tubes

Due to the lack of a clutch mechanism on Shimano road derailleurs

rounded casing conserves energy and feels quick to respond

Drop-Stop ST is designed for Shimano 12-speed Hyperglide+ chains

Wheels Manufacturing Derailleur Hanger - 499 MFPN=00.4020.557.000 The Ancora Expansion Plug isWheels Manufacturing Derailleur Hanger 499. Wheels Manufacturing hangers are stiffer than almost any OEM hanger which improves durability and shifting performance. OEM hangers are only produced by a handful of manufacturers mostly in Taiwan and China. As a result you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. CNC