Product Description with the DU-EP800 Motor Shimano has developed the STEPS FC-EM600 crank arms especially for MTB, touring and city e-bikes with the DU-EP800 motor. They have 24 mm axle teeth and are mounted directly on the axle of the drive unit. The crank arms are made of anodised aluminium and are solid. The Q-factor is 177 mm. Thanks to their rigidity, the FC-EM600 can easily withstand the high forces typical of electric bikes. Guidelines for Replacing E-bike Components:Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance. Specifications:Application:All Mountain, Cross Country, City & TouringCompatibility:1xTechnical Information:Series:EP8 (STEPS)Crank Arm Material:AluminiumCrank Arm Length:160.0 mm, 165.0 mm, 170.0 mm, 175.0 mmQ-Factor:177 mmAxle Diameter:24 mmCompatibility:DU-EP800DU-EP801DU-EP801-CRGDU-EP600DU-EP600-CRGFeatures:special crank arm set for e-bikessolid aluminiumstiff construction for the best power transferManufacturer Numbers:160.0 mm:E-FCEM600MXXL165.0 mm:E-FCEM600AXXL170.0 mm:E-FCEM600CXXL175.0 mm:E-FCEM600EXXLContents:1 x pair Shimano STEPS FC-EM600 Crank Arms2 x crank bolts Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com