Well it all depends on overall diameter. If it's 21inch's but with an overall bigger diameter than say 19's it would be ok. Guess there making 21's for cars with massive wheel arch's.
But if keep the same overall diameter as a falcon wheel, then for me i say 17's is a good size for balance between handling, durability and looks.
Just for the record i only have 15's.
Motor May 2001 Quote: "Believe it or not, there are actually a bunch of weirdos out there who reckon a six cylinder is the dux gutz. Bugger it: I'm one of them" :s5
AUII Late Ed XR6 HP T5 Venom- Full Tickford Body Kit, 17in Wheels, Herrod Bi-plane Spoiler, Momo Steer/Gear, T-Series Interior Options, Premium Stereo and a very light-tuned 4.0L I6
(FPV-Tickford Club of NSW Member and Co-Founding Member of 3FB Inc, Ford Forums Food Bandits)