B44.3 uses 10mm hex fronts and 12mm hex rear wheels as standard. So get yourself a set of clamping hex's for the b44.3 which will fit straight onto your B44, and get the B44.3 wheels as well and you'll keep everything to the right width.
I run both my B44.3's on pin and hex as I had so many wheels of that type it wasn't worth running the hex drives.
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