45 x 45 degree "ACB" measures: 30.5mm ID x 41.8mm OD x 6.42mm W

High grade 440 Stainless Steel races and and ball bearings. Dual lip sealing system.

Replaces the UPPER Headset Bearing in the following SPECIALIZED frames:

2009 and later Epic frames
2009 and later Era frames
2008 and later Stumpjumper carbon frames
2009 and later Safire frames
2010 and later Enduro frames
2010 and later Stumpjumper alloy frames
2013 and later Camber frames
2013 and later Myka frames
2011-12 Tarmac frames

Bearing is also known as:

MR042
870E
MR121
MR070
MR084
MR116
TH-870E
MH-P08

BEARINGS SOLD INDIVIDUALLY