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Product Description Alfine internally geared hub SG-S7001-8 by Shimano - for an efficient cadence The Shimano Alfine SG-S7001-8 internally geared hub is an 8-speed hub that is compatible with Center Lock disc brakes. It has a range of over 300 percent (Inter-8) and closely spaced shifts to maintain an even cadence. Also its quiet function and the shift force support make the SG-S7001-8 the ideal partner for every City bike. Of course you can also use the Alfine internally geared hub on e-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:Series:Alfine S7000Application:City, City & TouringGears:8-speedBrake Type:Center Lock DiscAxle Type:10 mm bolt-on axleOver Locknut Dimension:135 mmSpoke Hole Count:32 hole, 36 holeTechnical Information:Range:307%Material:aluminiumTechnology:Inter-8Axle Length:187 mmSpoke Size:13 gauge (2.3 mm) / 14 gauge (2.0 mm)Bolt Circle Diameter:92.6 mmFlange Diameter:104.3 mmFlange Width:3.2 mm right, 3.2 mm leftFlange Distance:57.3 mmOffset:3.15 mmCompatibility:Small Parts Set:SM-S7000-8Shifting Unit:CJ-S7000-8Resistance Unit:Disc (BR-S7000 recommended), V-BrakeDropouts:horizontal without derailleur hanger*, standard type without derailleur hanger*, adjustable, vertical with derailleur hangerChain Tensioner (for vertical dropouts):CT-S500, CT-S510Sprocket:CS-S500, SM-GEARCrank:FC-S501Chain:super narrow 9-speed, HG 8-speed (1/2 x 3/32" )E-Bike:EP8 EP801 for Urban / Touring (Lifestyle), EP8 EP800 for Urban / Touring (Lifestyle), EP6 for Urban / Touring (Lifestyle), STEPS E6100, E6180 (Japanese market), E5000, E5080 (Japanese market) * not recommended for disc brakes Features:top normal orientationsilent freehubshift servoshift power modulatorhigh efficiencyanodisedoptimised overall riding comfort and efficiencyhigher shifting capacity even with the high chain tension typical for e-bike motorsoptimisation: suitable for both e-bikes and conventional bicyclesTechnology:Inter-8 Shimano 8-speed gear hubs with Inter-8 technology have a total gear ratio of over 300 percent. Due to the close gradation of the gears, they enable a smooth, efficient cadence and thus greater comfort while riding. Gear Change Support Gear Change Support is a shift servo technology on Shimano gear hubs. It ensures that you can downshift quickly, precisely and without using a lot of force, as it uses part of the pedal force for this process. The pedal force acts against the shift cylinder to overcome its counterpressure and execute the gear change. The shifting force is thus reduced by 40%. Manufacturer Numbers:black 32 hole:I-SGS70018BLblack 36 hole:I-SGS70018ALsliver 32 hole:I-SGS70018BSsliver 36 hole:I-SGS70018ASContents:1 x Shimano Alfine SG-S7001-8 internally geared hub1 x Shimano Center Lock cover Weight: black | 32 | Internal gear hub | Hub gears: 1670 g Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com