So I'm no wheel/alloys/tyres expert but I've tried to use the interweb and the gogle to enlighten me. I'm now going to hijack this thread and clarify I'm on the right tracks.
I have the alloys pictured above, 19x9.5J ET 35 on the front and 19x10.5J ET 20 on the rear.
This means my front alloys are 19 inch diameter with 9.5 inches width with a "natural" 35mm offset and my rears are 19 inch diameter, slightly wider at 10.5 inches and a smaller offset.
If I'm replacing the rear tyres on my car, they will need to be a width of at least 10.5 inches or 267mm. I'm currently running 285/35ZR19 which means they are 285mm wide, a low profile of 35% (of the tyre width) and a diameter of 19 inches.
I'm also assuming my current tyres are stretched out and on willtheyfit.com it tells me the change in gaps and speedo if I change the tyre size so I'm happy with that.
Where I need help.
1. I'm not sure what the ZR stands for, supposedly the speed rating?
2. What is the minimum and maximum tyre width I can use on these alloys safely?