【Shell width】Fit frames with 68/73mm bottom bracket shells
【Thread】BC1.37-inch*24T L/R Threaded Connection design enhance lateral stability to avoid creaking sound.
【Material】 Bottom Bracket characterize cold-forged machined aluminum alloy cups, dual-labyrinth bearing covers and precision sealed bearings, weight about 74.7g.
【Application】Designed for road bike, they are perfect match 29mm crank spindle.