KOVNOVI 2PCS 6805N Bicycle Bearing 25x37x6mm for HT2 BB51 GC15 BB86 Bottom Bracket 6805-RD 6805N-RS MR25376 RS Si3N4 Ball Bearings Accessories

Description

• BOTTOM BRACKET BEARING:
• The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely.
• It contains a spindle that the crankset attaches to, and the bearings that allow the spindle and cranks to rotate.
• The chainrings and pedals attach to the cranks. The bottom bracket fits inside the bottom bracket shell, which connects the seat tube, down tube and chain stays as part of the bicycle frame.
• The bottom bracket or BB is the engine room of your bike s chainset and one of the two most important bearings on your machine (the other being the headset).

BEARING STRUCTURE

52100 Chrome Steel Outer Ring & Inner Ring Si3N4 Ceramic Balls Nylon Cage + Grease + Sealed = HYBRID CERAMIC BEARINGS

DETAILS
Part Ref: 6805N-2RS
Bearing ID: 25mm
Bearing OD: 37mm
Bearing Thickness: 6mm (6805 is normally 7mm deep, but this 6mm deep narrower version
Material: Chromium Steel
Seal:Sealed cover

HOW DO I KNOW IF MY BOTTOM BRACKET IS GOING BAD?
There is a fairly simple test to determine if the bottom bracket bearing is worn out. Shift the chain to the inner most rear sprockets front and rear. Drop the chain off the smallest front ring, and arrange it so it will not strike the chainrings. Spin the crank while holding the bike with one hand.
BEARING REMOVAL
The bearing unit is removed using the Bottom Bracket Tool Set. Insert the bearing remover through the bottom bracket.
Pull the remover through the bottom bracket . Listen and feel for a click as the blades engage inside the bearing unit.
Use a hammer to strike the tool end and drive out the bearing unit. Reverse the remover tool and repeat by driving out remaining bearings.

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