Great, thanks for the quick reply. I'm looking to try a set of 888s on my 05 Elise, 225/45/15 front and 245/45/16 rear, on Rota's, that fit without rubbing on an 06 Exige. Looks like they should fit fine on my Elise too.The fittment is the same, but the standard Exige front wheels are 16x6.5 as opposed to the Elises' 16x5.5. Rears are the same at 17x7.5, as are all the offsets (+31f / +38r).
The 5-spoke 240R Cup wheels are the largest OE @ 16x7f & 17x8r (same offsets as mentioned above).
Fittment really depends on what tires you're using and how low you run your car. I have an '06 Exige with the stock suspension and run 205's up front and 245's out back with no issues whatsoever.