Bottom Brackets

Wheels Mfg solution for running a 30mm spindle crankset in a BSA threaded frame. Machined aluminum cups thread in to a standard threaded frame and feature Enduro 6806 ABEC-3 sealed bearings outboard of the BB shell. Fully serviceable. Notes: - For use with BB30 Wide 30mm diameter cranks with a spindle length of at least 104mm. - Will not work with standard BB30 cranksets. PLEASE MEASURE YOUR BB30 CRANK SPINDLE LENGTH! - Use only bottom bracket tools compatible with 16-notch MegoEvo BB’s. (FSA MegaEvo and Park Tool BBT-29). - Bearings: Enduro ABEC-3 - Color: Black - Bottom Bracket/Frame Interface: ISO/English or BSA Threaded (1.37 in x 24 TPI) - Bottom Bracket Shell Width (mm): 68mm - Bottom Bracket Shell I.D.: 33.6-33.9 mm - Crank Spindle Type: BB30 Wide, BB30a, 386EVO, Rotor 3D+, SRAM BB30 Wide - Crank Spindle Diameter: 30mm - Crank Spindle Length: At least 104mm - Weight: 102g

- Steel body - Steel cups - Chromoly spindle - Sealed bearings - Interface: English - Square Taper JIS - Weight: 305-320 grams

Shimano's BB-UN55 Square Spindle Bottom Brackets are the unofficial standard for English-threaded cartridge bottom brackets. Quality, value, and durability come together to keep you cranking for many, many miles. - Fits JIS Square-Taper Cranksets - Hollow spindle - Crankarm fixing bolts not included