that's the exact wheel/tire combo for my head40s. before i got air suspension, i would rub with my wheels turned at full lock on an uphill. rubbing in the back was minimal although there with a full load of people. of course those issues are a little better now with air when you can pump up if necessary. i would say with a 2" drop you would need to roll your rear fenders.
Thanks for all the input! Those are the wheels I'm after Chapelle! They're like yours, but all chrome and have a different center cap than yours. Might have a lead on them if I can get someone to bid/import them. Hopefully my contacts will come through.
The auction ended early. Someone bought them for 22,000 yen ($200)!!! So upset! These were in my reach, but couldn't get a hold of my contact to bid!