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The Signature series of ISIS bottom brackets are new this year for RaceFace.
They all feature a double row of contact bearings. They are double sealed
and feature double contact lips. There are double the number of bearings
in the BB than the competition and they are serviceable. There is an easy
access injector port to grease the bearings without disassembly. Four
versions are available XS, TI, DH, and FR. The weight of the Ti version
is 190 grams.
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