[Spridgets] No real difference in tires

[Larry Daniels]

Guy, why would a taller aspect ratio produce more rolling resistance?

Larry Daniels


----- Original Message ----- 
From: "Guy Weller" <guy.weller at tiscali.co.uk>
To: "'Chris King'" <cbking at alum.rpi.edu>
Cc: <spridgets at autox.team.net>
Sent: Thursday, January 10, 2008 5:58 AM
Subject: Re: [Spridgets] No real difference in tires


Chris,
You are correct about tread width; wider does have
more rolling resistance.
But I was only talking of the aspect, or tyre wall
height, not the width.  I made no mention of the
tyre width.
 
Guy
 
-----Original Message-----
From: Chris King [mailto:cbking at alum.rpi.edu]
Sent: 10 January 2008 11:43
To: guy.weller at tiscali.co.uk
Cc: spritenut at comcast.net;
spridgets at autox.team.net
Subject: Re: [Spridgets] No real difference in
tires


Greater rolling resistance?  I thought a skinny
tire, with a small aspect ratio, would have less
rolling resistance.
Why would this be an incorrect thought?
 
Agree with you on cornering and poor handling of
80 series tires.
 
All other things being equal, skinnier tires are
better in snow as well, as they tent to track
straighter and not slip sideways as much. Just
look at the width of the tires on WRC cars in the
snow stages.
 
-=Chris

Chris King
http://home.comcast.net/~kvcbk/

 <-----Original Message----->

    From: Guy Weller [guy.weller at tiscali.co.uk]
Sent: 1/10/2008 6:11:19 AM
To: spritenut at comcast.net;spridgets at autox.team.net
Subject: Re: [Spridgets] No real difference in
tires 

Another angle on this is that the taller sidewall
tyres - that is the 80
aspect ration tyres - will deform more on
cornering and will also
generally have a greater rolling resistance. This
reduces acceleration,
increases fuel consumption and gives poorer
handling on twisty roads.
Generally all bad points. They do, however give a
slightly softer ride.

Guy