[gspannu]

I have a F10 535 (UK Model, not X-drive); factory tyres came with staggered setup as
245/40 R19 fronts and 275/35 R19 rears.

Now, its tyres are coming up for replacements. It currently has Michelin Primacy; and I am now looking to get either Michelin Pilot Sport 4 or the better Pilot Sport 4S.

Problem is that Michelin does not do the 245/40 R19 size in either PS4 or PS4S, so I am looking for an equivalent R19 tyre size for the fronts. I'd like to keep the rears (if possible ?) at 275/35 R19.

Will a 255/35 be suitable at the front? Other choices? I am not looking at any specific setups; just something that will not cause tramlining or other tracking issues; just something that will work on the F10.

Help please?