it has all the performance benefits of Serfas RX technology loaded into a sleek nimble package

Stack height of 30mm

The KMC Z1eHX Narrow chain is suitable for a variety of single speed riding styles

Total length: 300

thoughtful ergonomics

Shimano Ultegra CS-HG800 11-Speed Cassette 11-34T Silver compatio_raw it has all the performanceSHIMANO 11 Speed HG EV 11 34T Road Cassette Sprocket Compatible with GS cage rear derailleurs, the HG800 11 cassette offers low climbing gears perfect for mixed surface riding. It is compatible with both 10 and 11 speed freehubs. Hub body designed to fit a variety of bikes from MTB to road bikes * Spacer required to fit hub body to road bikes