I know that another manufacturer makes a direct fit replacement for the 23mm hex but dont remember who or the part #. You cant hardly buy 23mm hex wheels anymore. ANY help would be great. Theyll be going on a TR Arena. I want to say that it was possibly mugen parts that fit.

i think mine are HPI or ofna. But you could just buy the GSR 5.0 17mm hexs

If i remember right, you can use the buggy hubs, with a washer used as a shim, and use the 17mm stuff that way.