Splined bottom bracket for use with Shimano Octalink chainsets. Octalink splined axle/crank arm interface.
SHIMANO UN300 SQUARE TAPER BOTTOM BRACKET 68 X 110 / 113 / 115 / 118 / 122.5mm
Shimano Bottom Bracket UN300 68 x 122.5mm Square Taper BB British Thread
Shimano BB-ES300 Octalink Bottom Bracket - 68 x 121mm
Shimano Bottom bracket UN100 - Square taper - 68 x 122.5mm ( BB-UN100 )
Shimano Bottom Bracket UN300 68 x 107mm Square Taper BB British Thread
Shimano Bottom Bracket UN300 68 x 113mm Square Taper BB British Thread
