51mm - 45mm = 6mm difference. 1/4" = hardly noticable.
8" vs 7.5" is not an issue - unless you're putting on tires that are narrower than the rim. which is silly - THAT would look ridiculous. 225's are 9" wide so there's no problem there...
The VMR 710 wheels, according the vmrwheels site, are 8.5" wide with a +ET45.
This would work out to be 18mm further out from the Detroit wheel.
If lowered, that sounds like it may rub?
I've got 10mm spacers with the Detroit wheels, lowered 1 1/4", no rubbing, but it is hard to imagine being out another 8mm without rubbing. Hmmm, don't know for sure.
I do know the fronts look like they have less wiggle room than the backs do.
Anyone out there done the 710s, lowered, without issue?
I saw a couple GTIs on the VMR website with wheels of that width and offset, but it was hard to see from the picture angles posted if the wheels were sticking out too far.