We are experts in bicycle headset bearings. With different headset and bicycle manufactures using their own codes and names for bearings, it can be a minefield trying to work out the correct bearings. We sell individual bearings and kits for bikes and headsets. Our bearings are sourced from the best suppliers, and all our bearings are tested. We are cyclists ourselves!

A full bearing kit for many Trek bikes that use the the Trek Knock / Block bicycle headset system.

You will receive 1 x upper and 1 x lower bearing These bearings have been carefully selected from quality supplier, Minhon. Precision milled and Mobil grease used. These are better than other generic bearings you may find, carefully selected, but remain at a competitive price.  WATCH OUT FOR COPYCAT LISTINGS, we are the irginal and best suppliers of headset bearings. 

No need to look any further for individual bearings and numbers. Buy this kit, fit to headset and get riding. Easy! We offer free returns if the bearings do not fit.

RRP for FSA bearings are £35, the same prices as a whole new headset! These are just as good and a lot cheaper!

What you will get: 

1 x 1 1/8" Upper Bearing (TH873E)
 Also known as: MH-P03K,  MR122, MR054 p03k TH873E,  MR122, MR054, MR115, HSS20130K, PT-R401, AC3041 R2

FSA PRODUCT CODE: 160-0014000000 (Was 160-1648)

S44 TOP HEADSET BEARING

ID - 30.15mm

OD - 41mm

H - 6.5mm

Angle - 36˚ 
/ 45˚

1 x 1.5" Lower Bearing (TH073)

Also know as: ACB518K, MR110, MR127, TH-073E MR110, ACB518K, TK518B

ZS56 BOTTOM HEADSET BEARING

ID - 40mm

OD - 51.8mm

H - 8mm

ANGLE -  36˚ / 45˚

Take out old bearings, clean the cups, grease cups with grease, fit these new bearings and some more grease.