This kind of ball "bicycle bearings" is with seven stainless stell ball inlaid in the retainer designCan be a ideal replacement for the mid axle axis bearing of racing bicycle or mountain bike.5 piece incorporated in this package.My place comes with the top of seeking, you pronounce with the word from search engine “Your Print On Canvas : Wheels Manufacturing Ceramic Bicycle Bearings”

Avenir by Raleigh is the premier bicycle accessory line from legendary Raleigh Bicycles. Deluxe 16-inch unicycle with oversized, chrome-plated steel frame Cushioned seat with scuff-guard protection for comfort and durability Cotterless crank arms and full-sized nylon pedals with chromoly spindles Saddle is adjustable up, down, forward, and backward for maximum comfort New and improved wheel mounts; sealed bearings withstand heavy loads

Do not Miss!! Avenir by Raleigh is the premier bicycle accessory line from legendary Raleigh Bicycles. Deluxe 16-inch unicycle with oversized, chrome-plated steel frame Cushioned seat with scuff-guard protection for comfort and durability Cotterless crank arms and full-sized nylon pedals with chromoly spindles Saddle is adjustable up, down, forward, and backward for maximum comfort New and improved wheel mounts; sealed bearings withstand heavy loads 

Their bottom bracket uses two adjustable cups to hold the bearings and spindle in place which makes it possible to achieve the perfect chain line, since the bottom bracket can be positioned within a 5 mm band of “normal” centered position. The cartridge bearings are plainly visible when the unit is installed, which might make one wonder about the durability when used in extreme conditions, but Phil Wood Co. uses “seals which are as good or better than those found in the highest quality submersible motor and pump bearings”. I have only seen one Phil Wood bottom bracket that needed servicing though, and even that was straightforward….the unit can be sent back to the company for new bearings at a reasonable cost.

Their approach to bottom bracket design strives to incorporate the best of old and modern technology. Rather than using cartridge bearings pressed onto the spindle and into the bottom bracket cartridge they use bearings which are received by races which are part of the spindle and the shell. Custom seals are used to keep contaminants away from the assembly. This way they can use roller bearings on the drive side and over-sized bearings on the non-drive side increasing durability and strength. This design has some appeal to the retro-grouchy Bike Hermit, and SKF is proud of it too