I am probably the only one that did not know about this, but in case I am wrong I want to let you guys know that Kyosho has the flanged wheel nuts that have the little cuts into them that dig into the plastic wheels. I just found out about these from Kyosho a week ago. These are similar to the ones that Mugen and Serpent have been selling. I just think ours are a bit less money.
Part number 1175. They are $3/pack and there are 10 wheel nuts in the pack.