E91 tyres. Sorry chaps, another RFT question!

[Fastchas]

I'm going to order 4 new tyres from Black Circles this week. I'm currently on the stock 205/55/16 RFT's and I'm going to swap them for non-RFT's.
Is it advisable to keep the same size or can I go a wider fitment with a thinner profile i.e. 235/45. I'm thinking the suspension set up would lend itself better to a firmer, lower profile after being on the RFT's or is this wrongly assumed.
Also the rear offside tyre is wearing unevenly on the inside. Possible cause?
The car is a E91 320d touring '07.

Edited by Fastchas on Sunday 4th June 16:31

[Simes205]

Inside wear is common.
All 4 of mine do it.
I've been down to the wire on the inside edge of the rears twice.

[Vroomer]

Blame speed cushions

[Mike335i]

I would stick with the same sizes. I have swapped from michelin PS2 RFT the PS4 and have kept the same.

[helix402]

Keep the standard size tyres. If you change the tyre size on the original wheels your gearing and speedo will be out and it would look odd.