[Miata] Lateral Roll

[Ralph Alder]

Before doing anything else, replace the worn front tires with a set matching
the rears.  You didn't state if the rears were the same as the fronts.  If
all you did was to add two new tires to the rear, you likely have a
discrepancy between the slip angle between the front tires and the rears.
You don't ever want to unknowingly mix tire types front to rear on a car
noted for handling qualities.

Ralph Alder 
Tustin, CA 
'90 Classic Red 
Team Orphan Aerodyne

> -----Original Message-----
> From: miata-bounces at realbig.com [mailto:miata-bounces at realbig.com] On
Behalf Of Chris
> Klein
> Sent: Tuesday, May 06, 2008 8:01 AM
> To: Naked Pagan; miata at realbig.com
> Subject: Re: [Miata] Lateral Roll
> 
> I would suspect alignment first... I had an alignment shop screw up an
alignment job and one
> rear wheel had too much toe and it drove exactly as you describe...
> 
> If you visibly have good parts all the way around have the alignment
checked.
> 
> 
> 
> 
> Chris Klein
> www.thedigitalperspective.com
> 
> 
> ----- Original Message ----
> From: Naked Pagan <nkdpagan at hotmail.com>
> To: miata at realbig.com
> Sent: Monday, May 5, 2008 6:12:05 PM
> Subject: [Miata] Lateral Roll
> 
> 
> "Lateral roll" comes from my aviation background, its more of a rock from
side to side.I own
> a 93 with 125K. It has a brand new set of rear tires, a worn set in the
front, shocks are a
> year old and it just passed the state safety inspection.I've developed a
sway from left to
> right when I move the wheel to make a lane change. It lasts only a cycle
or two, and can be
> diminished with corrective steering. Its noticeable in city driving, but
more pronounced at
> 'express way' speeds, and can be a control issue. Kind of hairy when
trying to pass between a
> semi and a jersey barrier.What is the issue and how to resolve it? Gods
are fragile things;
> they may be killed by a whiff of science or a dose of common sense.
[Chapman Cohen]
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