16" so you can run slightly bigger brakes, no point it holding corner speed if you cant slow down for the corner in the first place

nigel b has the best set up in my opinion
coilovers
rear parrell bars (rose jointed) sorry about spelling im having a blonde moment
adjustable rear tie bars
adjustable front anti roll bar
adjustable tca's
and camber bolts front and rear for that added adjustments
but the best bit is the cage that is linked to the rear swing arm inner mountings and all for suspension struts and the pillars

but a very good road set up is koni shocks, chassis dynamic springs, polybushes, series 1 anti roll bar set up, 16" light weight wheels and some beefed up brakes