You getting the 1.5 or 2.0 one?

I use that on front bumpet, xpel brand
It become shinier

for me best is follow factory spec size. i know 45 series might not comfortable. even on my accord, factory size 235/45/18 had the same feeling.

mounting a 225 onto your stock rim shouldn't be an issue at all because it's a 10mm difference only anyway - and you gain 5mm in sidewall height so there's your cushion 

from the numbers, you can already tell that it won't matter at all whether you are running on 215/45 or 225/45 therefore my advise is to stick with the 215/45 so at least when it comes to warranty, there's no dispute.

Thanks
Actually not that too uncomfortable. It's just that when in really bad road condition, example in taiping area, the ride become extra bumpy n more road noise. So was thinking whether thin sidewall could be the case

Btw i never have issue driving in kulim/penang area, but when going back my wife kampung in taiping, really cannot tahan their road lol.