I have searched but never came up with a definitive answer. Is it 4 3/8", 4 5/8" or another?

 

I measured 4 5/8'' on my stock 5 stars. I was going to ask if this sounded correct. I measured from where the wheel mounts to the rotor to the top of the wheel. I used a straight edge acrossed the wheel and measured to the bottom of that.

 

Thanks, that sounds about right.