Hub only, must purchase Electro Pack separately. PN 558941 Carbon fiber insert and lightweight aluminum axle reduce weight to 416 grams Electronics package is completely housed within the hubshell, keeping moisture away from sensitive components 4 sealed cartridge bearings Hub Drilling 32 HubBrake Compatibility 6Bolt Disc Rear Axle Type 10x1 Cassette Body Type Shimano 910SRAM Rear Hub Sp
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