Sealed Stainless Steel bearing provides extra corrosion protection. This lower headset bearing is a proprietary oversized design with inner and outer race chamfers. All 440C stainless steel construction.

Our part number SS68808SP. Replaces Trek number 281819.

40mm ID x53mm OD x 7mm Wide. 45-degree x 45-degree design.

FITS THE FOLLOWING:

--2008-2009 5 Series Madone frames
--2008-2009 6 Series Madone frames
--2008-2011 4 Series Madone frames