Yes, I'm running the 7 spoke 18" 4200 rims on my GS at the moment for comfort.Do the wheel bolts have the same length thread on a GS and 4200? I v just ordered a new set of extended ones for spacers and suddenly thought they might be a differant length to when i had them on my 4200 ?
Metorical they are nice! Look massive though, do they hit the arches at the rear?
I have the GS pattern wheels from Eurospares they weigh around 3kg more than my 18” 7 spokes, and they are made from much stronger material than standard GS wheels.
I've got the Formula Dynamics wheels, which, are actually rebranded Forgestar F14's.
http://www.forgestar.com/wheels/collection/rotary-forged-monoblock-series/f14/
They are quality, and lightweight too.
I do like these, expensive though. It seems FD are the only ones selling them to UK market, I wonder if cheaper to import them oneself....