The Yokomo YOKBB850C2 is a 5x8x2.5mm ceramic ball bearing intended for RC applications where space and friction matter. It matches standard 5x8x2.5mm dimensions and is suitable for use in wheel hubs, gearbox assemblies, motor shafts and other compact bearing mounts on electric RC models.
The design uses ceramic balls with stainless steel races to provide a balance of reduced friction and reliable wear resistance. Compared to some conventional steel bearings, the ceramic/steel combination can lower rolling resistance while remaining compatible with typical RC retention methods and spacings.
Fitment tips: press bearings evenly into place using a driver or socket sized to the race, and avoid driving on the inner or outer race directly. To remove bearings, use a puller or press them out carefully from the opposite side to avoid damaging hub threads or sealed components.
Care and setup: inspect bearings frequently for debris and wear, clean with an appropriate solvent if contaminated, and add a light bearing oil or grease made for ceramic/steel bearings to suit conditions and desired drivetrain response. Correct lubrication helps maintain smooth operation and extends service life.
The BB-850C2 is a compact ceramic-bearing option for tuners seeking reduced rolling resistance without changing mounting dimensions.
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