Raleigh Diamondback rear BMX wheel, 48 spokes and 1cm axle on alex J303 rim. We've been building wheels here in Nottingham for over 125 years now, so we know a thing or two abot how to get it right! This Diamondback rear wheel is built, by hand, to the same exacting standards as the rest of our wheel range, here on site in our wheel build facility. Using a black, low flange rear "flip-flop" hub, 48 black spokes and black Alex J303 BMX rim, this wheel makes an ideal choice for a training wheel, a BMX'er on a budget or a decent entry level rider. Measures 50cm diameter.