Race Face Signature XS ISIS bottom bracket review

Best ISIS choice

Our rating 
4.0 out of 5 star rating 4.0
GBP £80.00 RRP | USD $130.46
RaceFace Signature XS ISIS Bottom Bracket

Our review

Well sealed and durable ISIS choice
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The splined ISIS standard for cranks and bottom brackets (BBs) didn’t last long before external bearing cranks appeared. The BBs themselves generally didn’t last long either.

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One of the few with a decent reputation for longevity (alongside the discontinued SKF) was this top-line unit from Race Face.

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The drilled, machined and heat-treated chromoly axle is a tight squeeze to fit but super-secure once set up. Eight independent seals keep the crap out and the same unit will fit either 68mm or 73mm shells.

Product Specifications


Name Name, 0, 10, Name, Signature XS ISIS BB
Brand Brand, 0, 20, Brand, Race Face

Weight (g) Weight (g), 2, 0, Weight (g), 224
Features Features, 2, 0, Features, 107-127mm axle
Available Colours Available Colours, 2, 0, Available Colours, Gold
Material Material, 2, 0, Material, Aluminium Chromoly Steel CNC Machined Nickel
Fits Shell Width Fits Shell Width, 2, 0, Fits Shell Width, 68mm 73mm
Bottom bracket - crank arms connection Bottom bracket - crank arms connection, 2, 0, Bottom bracket - crank arms connection, ISIS Drive