Shimano BB for Hollow Tec
04-14-26 | 01:57 PM
#1
Thread Starter
Senior Member
Joined: Dec 2011
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From: NE Ohio
Bikes: 1992 Serotta Colorado II,Co-Motion Speedster, Giant Escape Hybrid, 1977 Schwinn Super Le Tour
Shimano BB for Hollow Tec
Is there a quality difference in the bearings in the Shimano selection of external BB's?
Thanks!
Thanks!
04-14-26 | 02:14 PM
#2
Facts just confuse people
Joined: Jul 2017
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From: Mississippi
Bikes: Tarmac Disc Comp Di2 - 2020
Depends on what quality you are looking for. While the Dura-Ace will have the best performance quality, the Ultegra and lesser might last a tad bit longer. Very much marginal gains with all of it. You can't mix all of them willy nilly. So make sure to look at what BBs go with what shell size and crank. The hollowtech mtb cranks and road cranks aren't all the same spindle length.
04-14-26 | 02:24 PM
#3
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From: Sussex County, Delaware
I have ultegra, 105, and 4700 level BBs. I cannot tell a difference in how they spin. I've not had to replace any of them. I would guess the 105 has the most miles, but all are well used.
