A ceramic-bearing T47 outboard bottom bracket, machined for the Winspace G3 gravel frameset’s T47 shell. Ceramic races and labyrinth sealing keep it spinning smoothly through gravel seasons that would leave a standard steel-bearing unit grumbling. Four spindle fits - pick the variant matching your crankset. Fitted as standard on every G3 built through the Winspace bike builder; sold here as the replacement or upgrade unit.
