Wippermann Connex 9SE 9-Speed E-Bike Chain The reinforced design combined with stainless steel inner links make this chain extremely resistant to the high-torque load changes found in e-bike drivetrains. Corrosion resistant for maximum service life. Specification For all all 9-speed drivetrains Suitable for e-bike Dimensions: 1/2" x 11/128" Pin length: 6,60mm Roller width: 2,20mm Pin ejection pressure: >2000 N Pin hardening: XHB Links: 136 Weight: 332g