They will fit the rim but they are smaller.
205 first number is width.. 205mm wide. or 8.07"
70 second number is the tire sidewall height. It is a percentage of the
width. 70% of 205mm = 143.5mm or 5.65" rim to tread.
5.65 X 2 + 15 = 26.3" tall Your original tire is 26.85" tall.
The new tire is about 1/2" shorter & 3/8" narrower than your original. The
speedo will be fast by about 2%.
I have the olds van version and if were not aware, tires make a huge
difference in feel and handling. I drove a pontiac who's owner put on
what appeared to be smaller & 4 for $100 type tires and the thing was
horrible! Even at 35 it seemed to go all over the road. In contrast
my '98 Olds has 16" michelins and for a van, it feels "sporty" and
will go around turns faster than the occupants typically want to go.
Don't chintz in other words.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.