Tension and guide pulley set CeramicSpeed for Shimano 11s 12-tooth NW 9100/8000/RX800/GRX Alloy 607 stainless steel black (10734

The 12-tooth narrow-wide design on these CeramicSpeed pulleys decreases chain articulation and ensures a crisp chain engagement on to and off of each pulley. The symetrical 12-tooth narrow-wide design allows the chain to move smoothly on and off the pulleys without additional friction. CeramicSpeed Pulley Wheels for Shimano 11-speed, 12-tooth is developed, designed and handbuilt in Denmark and comes with separate dust covers to fit 9100, R8000, RX, GRX, XT and XTR series derailleurs. CeramicSpeed Standard Ceramic Bearings - low friction, high durabilityBearing race material: hardened-steelCompatible with 11-speed Shimano derailleurs: RD R9100, R9150 Di2, R8000 SS & GS, R8050 SS & GS Di2, RD-RX800, RD-RX805 Di2, RD-GRX 810, RD-GRX 812, RD-GRX 815 Di2, RD-GRX 817 Di2, XT RD-M8000, XT RD-M8050 Di2, XTR RD-M9000, XTR RD-M9050 Di2 Pulley material: aluminiumNarrow-wideBearing type: 607In the box:Two 12-tooth pulley wheelsAlloy Spacer KitCeramicSpeed Oil for Pulley Wheel Bearings, 15ml. bottleSticker SheetRELATED TECHNICAL INFORMATION:CeramicSpeed Standard Ceramic Bearings - put more of your energy into forward motion by reducing frictional drag wherever you can. CeramicSpeed balls are 100% smoother and 15% harder than ceramic competition. The bearings last at least 3x longer than other bearings. Maintenance:Depending on the riding conditions it is recommended once a year to re-grease your CeramicSpeed Bearings.If used in very wet or muddy conditions, maintenance might be required more often.If high pressure washer is used, please do not point jet stream to any of bearings (headset, bottom bracket, wheel hub, full suspension links) as it may wash out the grease. The kits come with CeramicSpeed oil in a 15ml dropper bottle. The bearings come with oil in them already. The oil is to keep them running smoothly.