As a recent buyer of 18's (Dare v5's), offset has little to do with the Brembo clearance issue.
The only true way of telling which wheels (which aren't listed as an accepted fittment), fit on the 20vt is to physically try them.
My Dare V5's fit perfectly, and clear the brembos with more room than the OE wheels. Offset on these is et28, (too push the wheels a little further out).
Hey Fabz are you sure the Team Dynamics Pro Race 1 fit the coupe? If so, then what is the specs you need as I can see you can get in different offsets, and i wanted them in 16 or 17 inches... Also, are they street legal or just for race?
I'm looking for wheels also and have been told by a few places the prorace 1 will go straight on. Personally I don't really like the look but each to their own. I don't think some suppliers will commit to which wheels will and won't fit unless they have had someone buy them before for the coop, most say come along and try some. Not so easy when you are far away from your nearest decent place and the closest is Demon tweeks with demonic prices!! Dave