Hi Ron,
Sorry I don't own a 10th TC....so I'm unable to measure the inside diameter for you!
The Mini wheels I talked about before (on previous reply) they have a inside diameter of:
Yeah racing Mini wheel = 34mm these will rub on the rear hub and wishbone
HPI 5 spoke wheels = 36mm and I beleive they work OK without having to grind anything (I've not tried these as I sold my Blaze before I bought these wheels!!)
10th TC wheels are gonna have a larger inside diameter
I'd guess around 60 - 65mm
Hope that helps?
Lee