18" Tyre Size

Thinking of getting some R26 alloys but was wondering what size tyres people run with this size on a clio?

Also will it be a problem running them with H&R's?
 
i use 225/40 but the raider uses 215/40...

shouldnt be any issues with coilovers as far as i am aware
 
I have 3 spare 235 40 18 im my garage mate you can have for a couple of quid one is Is a brand new budget other 2 are dunlop sport max with 3mm tread