SuperSpeed's 6903-CH 17mm front hub bearings are custom manufactured, ceramic hybrid deep groove ball bearings incorporating our unique ultra-low friction seals and low viscosity oil lubricant. The 6903 bearing is used by the new OTK low profile hubs (replaces OTK part # 0024.A0). Other standard 17mm hubs use our SuperSpeed™ SS-6003-CH hub bearing.
All of our bearings are custom manufactured exclusively for SuperSpeed™ Racing. We start with the highest quality ceramic hybrid bearing components, including 52100 chrome steel deep groove rings, solid silicon hydride (Si3N4) polished balls and low friction polyamide cages, manufactured to C3 clearance and P6 precision. Then we go further than any other manufacturer, utilizing unique ultra-low friction, no-contact seals and low viscosity oil lubricant, eliminating up 90% of the friction of most other ceramic bearings.
Note that SuperSpeed™ bearings should be lubricated before the first use, re-lubed frequently and cleaned occasionally, depending on conditions of use, to offer the lowest friction and longest life possible. (See our Tech Tip Lubricating Your SuperSpeed™ Bearings for more details on caring for your bearings.)
Dimensions: 17x30x7mm