Recently I upgraded both the wheels and tyres on my car, and had to go to a
70 profile height instead of 80, because I was worried about the rolling
radius being different to original. Would this actually have been a
problem, because next time I might fit the higher profile in order to get
a better ride?

Depends if you changed the width. Usual reason for going lower profile is to
maintain the gear ratios and speedo calibration (and wheel arch clearance)
when using wider than standard tyres. eg. 145/80/10 is roughly the same
rolling radius as 165/70/10 (and possibly 165/55/12?). The poor ride is the
price you pay for fashionably wide boots. (A lot worse with 175/50/13s, I
would guess.)

"greasemonkey78" <bonefish45 (AT) tiscali (DOT) co.uk> wrote

I have two cars (mine and the wifes) on 13's and both are comfortable....my
66 S on 10's is more nimble and easier on tight turning... but feels ever
pot hole in the roads ....

Mind you both cars on 13's have the Moulton Smooth ride kits fitted.....

"Paul Prescott" <Paul.Prescott2 (AT) ntlworld (DOT) com> wrote

Tim, does the '66 'S' still have the 40 year-old rubber springs?

Cheers, Kelley

On Tue, 9 Aug 2005 18:22:26 +1200, "Tim"
<tim_lis(NOSPAM)@clear.net.nz> wrote:

"Kelley Mascher" <mascherk (AT) comcast (DOT) net> wrote

I think his car has new rubber cones fitted, these are part of the moulton
smoothride kit,

Steve.