The Radio Zilla is an outboard bottom bracket set for frames with a threaded BSA or Euro shell, so you can run a BMX crank spindle in either 19mm or 22mm.
It uses oversized sealed bearings with 6061-T6 alloy cups, cones and spacer and stainless bearings. Crank arm spacers plus 68mm and 73mm tube spacers are included so it suits either shell width. The 22mm set weighs 170g.
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