I'm buying some bbs style 15 x 8s for my fiesta and was wondering what's the best size to tuck inside the arches, I'm thinking 195/45s but is there a better stretch than this

 

I have 195/45 R15 on my fiesta! I thought that it was a 7j wheel and that works ok!
8j does seem a lot for the fiesta!

what offset you using?

 

I was going to try and get et38 if possible, the reason I was going 195 on a 8j is that they sit better in the arches

 

The normal Fiesta RS Turbo wheels are 14 inch 6j most of the 15" I looked at were 6.5j. at the time only the team dynamics pro race type wheels were 7j. I wanted to be able to fit bigger disks and calipers under my wheels but not stray too far from the geometry ford had in mind!

I use modified sierra 4x4 setup - I had some new pistons machined out of stainless steel so they will never rust and seize!

I really wanted to get the bleed valves done the same or in titanium for the same reasons but haven't been able to yet!