I found these wheels at a Dollar Store!
They were packaged sepparately and sold as toys with an optional launcher.
The wheels are about 10th scale and are very nicely detailed, perfect size for Triangula!
I removed the nylon launching parts and finally found a good way to mount these to Triangula!
I am grinding the square mounting post down so that it fits inside a thick piece of plastic tubing.
Then I found another length of plastic tubing that fits inside the first length of tubing, and it fits the front axle mounts!!!
This set-up works Great on the rears too!