BSD Substance Mid Bottom Bracket Headsets Integrated crown race designed for

Integrated crown race designed for integrated 45° headsets

available in multiple diameter options to suit frames with different seat tube sizes

The Blue Falcon flies again

while being super slim and flexible thanks to the EVA foam padding

Weight: 91 grams (mid) / 131 grams (long)

BSD Substance Mid Bottom Bracket Headsets Integrated crown race designed forThe BSD Mid bottom bracket fresh bearings to freshen up your bike, no matter what spindle you have (provided, its a 3 piece crank, of course!) Precision sealed cartridge bearings CNC machined spacers Spacer kit to ensure correct fit Hollow CrMo crank arm bolt 19mm, 22mm & 24mm versions