i'm about to buy a set of stern wheels, they will be 18x8.5 and 18x9.5 I can get offsets in 20mm, 25mm, 32mm, and 35mm. can you tell me if thry will bit my FD with tein hR coilovers? tires will be 245 and 285 if i can.

 

None of those offsets will fit.

If you rolled the fenders, you may be able to get the +35 offset option to work with 235/40 (or 245/35) and 265/35 tires, but it will be a tight fitment.

 

ok, then what offeset will be needed to fit those size wheels/tires?

 

Absolute minimum: +38
Minimum I would run: +40
Ideal Range: +45 to +50

 

I myself am going to order rims that have +38 offset. Will that cause any problems?

 

Jimlab did all of the hardwork in calculating fitment....

check the Excel spreadsheet in this thread
https://www.rx7club.com/forum/showth...=wheel+fitment