> > They were rated load index 97, 1,580 pounds
>
> All the info I'm finding shows Load Index 97 > 1609 Lbs
>  ~ not much more but more ~=

Remember that if it is not an LT rated tire the load capacity must be
reduced by 6% when installed on a light truck (which a Vanagon is
considered), as per DOT safety standards. So a passenger car tire rated at
1609 lbs is considered a 1512 lb tire when mounted on a Vanagon.   (If it
were an LT tire it would carry the full 1609 lb rating when used on a light
truck.)

Ron Salmon
The Bus Depot, Inc.
www.busdepot.com