Hi all, im not sure if this went into the correct forum, but anyway sorry if it has....

I need good advice regarding the following...Will an et25, 6j 16" alloy wheel fit ok onto my fiesta rs turbo?? They will be wearing 195/45/16 tyres. I currently have mondeo 16" alloys et40 7j with same size tyres. Th arches have been rolled and its lowede 35-40mm

I know nothing about offset so i need some help. Many many thanks. Edd.