1-1/8" ENDURO STAINLESS ANGULAR CONTACT HEADSET BEARING

36 x 45 degree "ACB" bearing measures: 30.15mm ID x 41mm OD x 6.5mm W

440C stainless steel balls and races provide long life and superior corrosion resistance in applications and environments that may be less than ideal. 440C has the highest strength, hardness, and wear resistance of all the standard 440-series stainless alloys with high carbon content. This bearing is a drop-in replacement for many Trek upper headset bearings (including the plain steel Trek bearing W531676).

Fits the following upper head tubes:
--2008-2009 5 Series Madone frames
--2008-2009 6 Series Madone frames
--2008-2011 4 Series Madone frames
--2012+ 4 Series Madone frames
--2010+ 5 Series Madone frames
--2010+ 6 Series Madone frames
--7 Series Madone frames
--2010+ Fisher Cronus Ultimate frames
--Trek Crockett frames

BEARINGS SOLD INDIVIDUALLY