Connectors feature Serfas' great dual-density design for excellent comfort

The dual-compound design features soft-density rubber on the main contact areas for padding

Bluetooth Smart and ANT+ dual band technology allows you to connect to and display data on both smartphones and GPS bike computers

or smart trainer to control fan speed

4 degrees of float both inward and outward

WHEELS MANUFACTURING Derailleur Hanger - Dropout - 53 Compatio_enriched Connectors feature Serfas' great dual-densityWheels 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 machined 6061 aluminum Black anodized finish