FSA Gamma Drive Megaexo review

FSA's new Gamma Drive MegaExo takes external bottom bracket technology to the cheapest level yet. It doesn't do it lightly, though.

Our rating 
3.0 out of 5 star rating 3.0
GBP £75.00 RRP
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Our review

Cheap for an integrated setup, but too heavy to take advantage of it
Skip to view product specifications

FSA’s new Gamma Drive MegaExo takes external bottom bracket technology to the cheapest level yet. It doesn’t do it lightly, though.

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For a start there’s more metal in the cast aluminium cranks than there is in the forged pieces here, with the one piece drive-side arm and spider being a particularly bulky lump. Add steel inner and middle rings and a bottom bracket that’s twice the weight of others here and you’re adding over 1.2kg of mass to your bike. We’re not convinced the narrower integrated axle adds any significant stiffness compared to a separate splined BB assembly, either. At the end of the day though, we’d be more able to forgive the DH category weight if the Gamma Drive was obviously oversized and tough enough to handle some serious freeride-style action. FSA only rate it for XC though, and therefore we’re hard pressed to recommend it over lighter chainsets like FSA’s £50 Alpha Drive.

Product Specifications

Product

Name Gamma Drive MegaExo Crank
Brand FSA

BB Weight 202
Description Chromoly Chainring Bolts/
Max Arm Length 175
Weight (g) 1080
Available Colours Black Silver
Material Aluminium Steel
Bolt Circle Diameter 104/64mm