My recent Blitz kart purchased

[ted johnson]

Richard, of course Go Power made aluminum wheels as well as magnesium, but I believe the ones Blitz used were mag. You can tell by cleaning off an inconspicuous area and applying vinegar. If it fizzes, the metal is magnesium. There were thousands of mag Go Powers sold, but over the years they've become a bit scarce in certain sizes. The ones that are concave in the area where the six holes are located are the later Series II wheels, and you might get repop wheels from Scott Wigginton at ASW  R&D Machining. The repops Scott sells are aluminum. You can also get the front Series II wheels  from Matco. They're an aircraft supplier, and they have the wheels as nosewheel assemblies, complete with ball bearings. If your wheels are CONVEX in shape, they're Series I wheels, and you'll just have to find them either on the forum or on eBay. You can give the TIG a shot and see what happens, but don't burn your shop down! Ted