SunRace BBS 15 Square Taper Bicycle Bottom Bracket Spindle – BBS15 Review Posted by Pelicandy August 26, 2018 in Drivetrain Components Sealed cartridge bearings with steel cups Square taper steel spindle 338g (113mm spindle) Square taper steel spindle. Sealed cartridge bearings with steel cups. 338g (113mm spindle) Random Products Shimano TZ500 6-Speed 14-28t Freewheel Review KMC Z410 Bicycle Chain (1-Speed, 1/2 x 1/8-Inch, 1... SunRace 8-Speed Bicycle Cassette – CSM66 Rev... Diamondback Bmx Chain Review Cycling Outdoor Recreation Parts & Components Sports & Outdoors SunRace