This may sound stupid, but why 15's and slammed' to the floor?
Back in the day it used to be fit the biggest wheel you could get in the arches but over time folk realised that apart from looks, they slow the car down, cost more for tyres, make it handle like a dog and can put strain on the suspension components.
With the
right choice of 15'' wheel you can have all the advantages and the looks!
Big wheels have had their day, R.I.P big wheels
Best looking wheels for a Clio are the 2118's imo - down side is the weight of them. They do slow acceleration down from my experience on the ph1 172. Ph2 / 182's will be different because in stock trim they run heavier 16's