I have a set of 740 wheels that have new tires i got for free can i use them on my 850 without running a spacer? they are 15's and the tires are 185 65 r15

 

You don't need a spacer.

 

with out rubbing?

 

Bolt them on. Drive for a few days and check. I didn't know of any 740 wheels that were 15" unless they come on the turbo.

I put 960 wheels on my 850 before and had no problem so you will likely be safe.

 

RWD offsets (20 or 25 mm) push the RWD wheels outward on a 850, i.e. towards the fender -- about 3/4" more closer to the fender. I really doubt it will rub. I am talking about speed bumps here, where the wheels are pushed up sharply.

More important is the load (pounds) that 185/65/15 tires can safely support. They probably are a 86 load factor versus a 91 load factor (OEM) tires.

If your 850 is driven empty you should be fine. If you load it up, the 185 tires will not be good enough.

 

1995 and on, the offset is the same for the 960 and 850 (+ 43 mm). Same wheels. I even used 17" Arrakis S80 wheels (48 mm offset) on my V90 without rubbing, although too close to the shock towers for my liking. I could have used a 5 mm spacer for piece of mind, but I do not like the larger wheels in the city for the wagon.

 

they are 88h's they will work till i can get good new rubber for the 16s thanks yall