Karyotype Sealed Bottom Bracket JIS
Genetic Karyotype JIS Bottom Bracket:
High quality traditional style Cr-Mo JIS square axle BB with
precision cartridge bearings lightweight forged Alloy cups
and Carbon Fibre spacer.
Supplied with Hex cap type bolts.
103, 107 or 110.5mm sizes.
A great choice for that ultimate lightweight fixie machine.
Weight 230g