Run 29mm spindle sram dub compatible cranks in a bsa threaded frame. machined aluminum cups thread in to a standard threaded frame and feature enduro 6806/29 abec-3 sealed bearings outboard of the bb shell. fully serviceable.Bottom Bracket Includes:- BB Cups with bearings- 2 - Silicone dust seals- 2 - 0.5mm crank spindle spacers- 2 - 1.0mm crank spindle spacers- 1 - 2.5mm crank spindle spacerSpecifications:- Bottom Bracket/Frame Interface: ISO/English or BSA Threaded (1.37 in x 24 TPI)- Bottom Bracket Shell Width (mm): 68mm, 73mm, 100m- Bottom Bracket Shell I.D.: 33.6-33.9 mm- Crank Spindle Diameter: 29mm- Tool Pattern: 48.5mm x 16-notch- Over Bearing Width: 91.5mm in a 68mm wide shell*- Weight: 102g