Alta Bike Bottom Bracket Set, Multiple Colors and Sizes Review Posted by GiantPandaisy May 23, 2018 in Drivetrain Components Available Colors: Chrome, Black, Gold Available Sizes: 5/16 x 7, 5/16 x 9 Sold as Set of 9 Pieces For 1 PC Crank Fits Most Beach Cruiser, Lowrider, Chopper Bike Frames Alta Cycling Outdoor Recreation Parts & Components Sports & Outdoors