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Application: 1.5" 4545 Headsets
45 x 45 degree ACB
51.9 mm OD, 40mm ID
6.3mm across chamfers
In Stock
Replacement "Top Hat" bearing cover pair for your Monocrome External Bottom Bracket.
These can also be used to fit 6805 bearings into Trek BB90 and BB95 internal bottom brackets.
This allows greater bearing choice.
Fits BSA external MCEBB001, MCEBB101 and MCEBB201.
Fits Screw-Fit 41mm also.
This version is tighter fit to remove any play or knock on worn crank spindles. It will be tight to install with new cranks.
Learn MoreFrom: US$31.65
To: US$32.20
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Kits built to order
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High Quality BSA Threaded external bottom bracket
Using standard, replaceable, 6805 bearings
Fully rebuildable
Steel or stainless bearing options
CNC Storm Drain options for extreme wet conditions
Compatible with MTB Shimano HT2, Raceface X type and FSA MegaExo cranksets (24 mm)
High Quality BSA Threaded external bottom bracket
Using standard, replaceable, 6805 bearings
Fully rebuildable
Steel or stainless bearing options
CNC Storm Drain options for extreme wet conditions
Compatible with MTB Shimano HT2, Raceface X type and FSA MegaExo cranksets (24 mm)