If you've just started out with a welder and want to do it yourself I'd obviously say to get some practice first... that's going to be a precision weld - you'd need to be within a couple degrees in order to allow the wheel to be aligned right afterwards. Plus the welds would have to be mighty strong so they don't let go at an inopportune time.
Me, I don't have welding tools. Lumber becomes the next best option, although admittedly it's like getting an award for being the tallest midget... you're still short.