RollerBoys Ceramic Jockey Wheels 11T [BDP-12]Equipped with low friction ceramic bearings for ultra smooth glide and exception durability. special teeth pattern for quick shifting performance. Lubricated with special ceramic light oil for extra smoothness. Composite material provided by EMS Swiss, with 40% glass fibre mixture. Complete set of bushings for difference shifting systems included. Specifications Compatible with brands Campagnolo, Shimano, SRAM Part Material Grivory EMS Bearing
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