I know this is an old thread, but I figured I would put this info out there for anyone that still has any questions on the subject. There are a couple of different options. Option 1: Get a set of Earthquake 3.5 or 8E wheels. You will need to remove the stock tires but you can't buy just the rims. you will have to modify the wheel as shown in picture #1. Sand or gring the lip off off the outside of the rim so it looks like a traxxas bead on a proline rim. The wheels are a 3.2 and almost nobody makes a good 3.2 tire anymore so you will be fitting a 2.8 tire to a 3.2 rim. There are Videos on youtube to show how this is done.I would also recommend upgrading to an aluminum 12mm hub and get rid of the plastic ones.I will try and post a link of "HOW TO" video. Picture #2 is the finished wheel and it looks pretty good. Option 2: Buy a set of RPM Revolver Rims for the Stampede with 17mm hex hub and the Redcat Racing 12mm to 17mm hub adapter kit part#RCR-1005. You will have to modify these in the same manner as the Earthquake wheels. Hope this helps. Last picture is installed on Caldera. I would also recommend a heat sink for motor, the tires are a little taller than the stock ones but if you are running a LIPO it should turn them just fine.