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Posted by B A R R Y on October 17, 2006, 7:36 am
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perfb@yahoo.com wrote:
>
> do other cars do this too?
>
My 2005 4WD Access Cab Tacoma does the same.
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Posted by mark_digital© on October 17, 2006, 12:51 pm
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> prius tire pressure spec says 35 psi front, 33 psi rear
>
> just wondering what the technical reason for this is?
>
> do other cars do this too?
>
It's to keep your high-beams high enough off the ground.
mark_
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Posted by Bruce L. Bergman on October 18, 2006, 2:26 am
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wrote:
>prius tire pressure spec says 35 psi front, 33 psi rear
>
>just wondering what the technical reason for this is?
Because more weight is in the front of the car than the rear, so
with a light load you want the pressure a bit higher at the heavy end
to keep the tire wear even.
I'll bet it calls for 35 and 35 if you have four or five passengers
and a full load in the trunk for a trip - and if not, that's where I'd
put it. If the sidewalls allow higher, I'd bump them both up to the
maximum pressure if you are carrying a maximum load.
>do other cars do this too?
Lots of cars do, some far more pronounced than that two-pound split.
Whenever all the weight is at one end, the tire pressures have to be
staggered to match.
My Chevrolet Corvair (rear engine aft of RWD axle) has a severe rear
weight bias and calls for 14 PSI front, 28 PSI rear. (With radials, I
ran it at 18/32.) The early VW Beetle and Porsche 911 series have the
same layout and a similar rear pressure higher stagger.
--<< Bruce >>--
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Posted by mrv@kluge.net on October 18, 2006, 12:53 pm
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perfb@yahoo.com wrote:
> prius tire pressure spec says 35 psi front, 33 psi rear
>
> just wondering what the technical reason for this is?
something to do with weight distribution.
I tried running my Classic Prius with the same pressures front and
rear. I didn't do that for long - the car felt like it would fishtail
at a panic stop, whereas with a +2 or +3 psi difference in the front it
would stick those same panic stops. (Beware of those Dunkin Donut
shops in the morning commute!)
> do other cars do this too?
My cousin's Chevy Malibu is 29 psi front, 26 psi rear.
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Posted by Coyoteboy on October 18, 2006, 1:01 pm
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perfb@yahoo.com wrote:
> prius tire pressure spec says 35 psi front, 33 psi rear
>
> just wondering what the technical reason for this is?
>
> do other cars do this too?
Fairly normal, certainly every car ive owned/driven has had higher
front pressures than rear. Its due to the weight distribution of the
car - the heavier front end requires more air to maintain the same
contact patch and sidewall deflection.
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