Tyre pressure

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Oct 23, 2010 | 06:30 AM

richibulbs

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From: Chesterfield

Tyre pressure

Hi

Does anyone know the trye pressure for a 93 Mazda RX7

Front - 235/35ZR19
Back - 265/30ZR19

Thanks for your help

Rich

Oct 23, 2010 | 04:40 PM

rxtasy3

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From: Spartanburg, SC

recommended air pressure is listed on the tire sidewall. usually around 35psi.

Oct 26, 2010 | 01:49 PM

DarrenTRS

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From: San Antonio, TX

Quote:

Originally Posted by rxtasy3

recommended air pressure is listed on the tire sidewall. usually around 35psi.

The number listed is the maximum pressure the tire can withstand before putting it in severe danger, not a recommendation. Unless there are some tires you have that say otherwise those numbers are always preceded by "maximum tire pressure" or something in the likeness along with a "maximum load" and a given weight.

Looking at a few BMW boards from a quick google search with your rear tire size and most seem to run 30-35psi depending on how you want it to ride some run up to 49 in the rear but I would also suspect these cars to be a bit heavier than an FD.

As well I would probably start with 35psi all around then begin to change it as you feel it might need and try different variations because tire pressure within the safe margin is really a personal decision.

While these next two quips are aimed more at stock tires it applies to all.

Edmunds:

Quote:

This number refers to the maximum amount of air you can put in a tire before you harm it. It is not the recommended tire pressure; that number can be found in your owner's manual and on the doorjamb.

Tire Rack:

Quote:

The pounds per square inch (psi) pressure number branded on the tire's sidewall identifies the maximum cold inflation pressure that specific tire is rated to hold. However, the tire's maximum pressure is not necessarily the correct pressure for every vehicle upon which the tire can be used (almost all vehicle manufacturers' recommended tire inflation pressures are less than the tires' maximum pressure).

Therefore when checking and adjusting tire inflation pressures, the "right" inflation pressures are those provided by the vehicle manufacturer, not the "maximum" inflation pressure branded on the tire's sidewall. The vehicle manufacturer's pressure recommendation can be found on the vehicle's tire information placard label, as well as in the vehicle owner's manual.