Performance Sportster – Wheels 2021-03-20 Projects Billet aluminium wheel blanks from USA. R19x3.00 for the front and R18x5.5 for the rear. Planned 100mm tyre in the front and 180mm tyre in the rear. The CNC machining center is too small to process the blank in one go, so it has to be done in parts. sportster wheels Older Post Performance Sportster – Wheels hubs Newer Post Performance Sportster – Rear light