Re: unsprung weight

["Bernard Littau" <bernardl@acumenassociates.com>]

Dave writes:
>the 15x8 et35 weights 8.4kg,
>the 17x8 et35 weights 10.8kg
>
>thus an increase of 2.4kgs (5.3 pounds) per wheel.  to put it another way,
>by going +2, you have increased your unsprung weight from the wheel alone
by
>30%.
>
>of course, the tyre weight would be on top of that.

The tire weight would not necessarily be strictly additive, as you imply.  I
would assume that a 50 series tires weighs less than a 70 series tire, all
other things being equal, no.  It may be a wash in terms of total mass.

Anyone have weights on the types of tires that would be appropriate on these
kinds of rims?

Bernard Littau
Woodinville, WA
sans Audi