Tribal Bikes USA American Bottom Bracket 19mm Sealed
US BB Size for 51mm shells and 19mm crank spindles.
Available in a range of colours: Black, bluem gold, red or silver.
Includes:
2 x Mid Bearings
2 x Coloured Alloy Adaptor Cups
1 x center spacer
2 x coloured dust covers
Selection of coloured spacers