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Our AC Bottom brackets are designed with precision cartridge bearings. Our BMX Euro Bottom brackets - so called because they fit in the smaller bottom bracket shells of traditional road and mountain bikes - are available with either CrMo or titanium spindles, and 48T spline or square taper. Our square taper Euro BB sets ( below) are typically used for alloy crank arms. They are available in 108,110mm, 113mm, 116 and 122 mm spindle widths. Our 48T spline Euro BB sets ( pictured below) are used with CrMo crank arms.
Our standard BMX bottom bracket is 48T
spline designed for CrMo cranks. It is
available in 140mm spindle width . It also comes in two styles/
diameters: a solid CrMo or titanium 19MM ( 3/4") for racing, and a larger, hollow
22mm( 7/8") CrMo spindle for trail/ ramp.
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CrMo Square Taper BB
Euro
48T Spline CrMo BB 
48T
Spline Titanium spindle 
19mm
48T Spline BB 