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Split/Different Front & Rear Cold Tire Pressures



 
 
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Old August 18th 20, 05:27 PM posted to rec.autos.tech
Chris K-Man
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Default Split/Different Front & Rear Cold Tire Pressures

Split Cold Tire Pressures: Front-to-Rear

I understand the technical reasons for why some car makers specify different cold tire pressures for the front and rear axles of certain models. My question concerns those vehicles (except for the obvious: large SUVs and work vans) for which different pressures are specified, vs vehicles for which a single cold pressure is recommended all around(all four wheels):

IE: Makes and models with less of a Front/Rear GAWR(Gross Axle Weight Rating ie: less than 55/45) - Audi, BMW, Mercedes, Subaru, etc., might specify up to a 5psi difference for the Front vs Rear axle pressures, where as makes with a significantly higher Front/Rear weight split(60/40) - Chevrolet, Ford, Honda, Hyundai, Toyota, etc., recommend a single pressure
value for front and rear Axle - in particular front-wheel drive models.


Typical late-model European sports sedan or wagon recommended cold tire pressures: F/R: 32/36psi

Typical late-model domestic or import front-wheel drive sedan or wagon cold pressures: F/R: 30 to 36psi, all tires.


My theory: The former are built for a more discriminating, enthusiast driving demographic whom will pay more attention to such things as different front/rear axle tire pressures, while the latter are built for the blue-collar masses, whose main priority is economical transportation in reasonably well equipped, reliably built vehicles, and live a busy lifestyle where it is easier to remember one PSI number - a compromise I'm sure - to set all of their tires to.

What's your feeling behind this difference?
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