Are these wheels stronger than the GS wheels and, if you don't mind me asking, how much do they cost?
I bought mine as did Benny second hand but never fitted, so the price we paid does not reflect the current price from a dealer, such as Torenno, however they are $2k a set so with import duty and shipping probably £2k.
I have discovered that these rims are actually Forgestar F14's, so it may be possible to buy direct from them, or a Forgestar dealer in the UK, however how forthcoming they will be with the correct offset required etc with them supplying Formula Dynamics I don't know!
Whether they are stronger than the GS wheels, I don't know either. Let's face it 19" wheels are just too big for our roads with too little rubber between rim and tarmac.