Blank compound xl bmx wheelsetblanks first ever entry level 40mm wheelset packs an almighty punch for a small price combining single skin rims with a low profile has proved to be a winning combination in this sleek and reliable wheelset featuresfront rim new blank compound xl single skin rim low profile 15 5mm design 40mm widefront hub alloy fully sealed 10mm male crmo axle 36 holerear rim new blank compound xl single skin rim low profile 15 5mm design 40mm widerear hub alloy fully