NEW unused classic old school design YST Loose ball bottom bracket with JIS standard square taper spindle ( Japan Industry Standard). 130mm (We also sell 122mm for narrow chainstay frames) width Will work with most standard 1980's old school 68mm American bottom bracket shell BMX frames and 3 piece cranks, such as Dura Ace, Maxy Cross, Sugino CT / GT, and many others, Will not work with oversize square taper cranks such as Sugino / Redline 400, DB Turbo, Haro Group 1, or GT Power Series.

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OLD SCHOOL BMX NEW YST AMERICAN BOTTOM BRACKET 130mm SPINDLE Square Taper crank