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3X3 Nine NO maintenance 9sp internal planetary gear hub - Bikerumor
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SRAM ends sales of internal gear hubs | Bicycle Retailer and Industry News
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Amazon.com : SHIMANO Nexus Di2 5 Speed CL Disc Brake Internal Bicycle Gear Hub - Sg-C7050-5D in Silver - 32H 135 x 187mm : Sports & Outdoors
