BB Set For 3-Piec Boe Cranks Fits Tracer Cranks and most other brands. available in any combination to fit American, Euro, Spanish or Mid BB Shells and 19mm spindles. Includes sealed cartridge bearings, Aluminum cups (on American and Euro versions only), spindle sleeve, cone washers and spacers. Spindle for monster tubular cranks Heat treated chromoly Axis 8Tx19x164mm Crank Set 170mm.