Shimano M770 Hollowtech II bottom bracket review

Great value BB

Our rating 
4.5 out of 5 star rating 4.5
GBP £34.25 RRP | USD $49.79
Shimano M770 Hollowtech II Bottom Bracket

Our review

Shimano’s revised bottom brackets are the best value around
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Shimano’s original bottom brackets were legendarily bad, but they’ve cleaned up their act to become one of the best value options around. 


The bearings are a lot more secure, so there’s much less chance of crank wobble. Much better sealing means we’re now seeing units last for months in the worst conditions, making them a decent investment.


The negatives are that the cup threads are a bit short for using with bottom bracket mounted (non-ISCG) chain devices, and they won’t fit Truvativ cranksets.

Product Specifications


Name M770 Hollowtech II Bottom Bracket
Brand Shimano

Available Colours Silver
Fits Shell Width 68/73mm
Cup Compatability Shimano XT