Chainring: Prowheel aluminum crank five-jaw 50/34T. Crank: Aluminum alloy. Rim: Aluminum alloy double rims 29mm height. Shift handle: Shimano ALTUS M315. Brake: ROCKBROS oil-hydraulic disc brake. Chain: 8-speed chain.
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ROCKBROKS RIDA-P2E Road Bike 700C Shimano 16-Speed Flat Bar Aluminum Frame Adult
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