When going from OEM 55 profile tires to aftermarket lower profile tires do you all usually leave the air pressures the same at the OEM spec?

I imagine that aftermarket tires in a 45 series profile would have a stiffer sidewall thus they would not need more air pressure.

Any experiences?

Thanks,
Aamir

 

I personally just use the same specs and adjust the pressures to my liking if neccessary. The OEM specs are generally a good place to start imo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid ctr &raquo;</TD></TR><TR><TD CLASS="quote">I personally just use the same specs and adjust the pressures to my liking if neccessary. The OEM specs are generally a good place to start imo. </TD></TR></TABLE>

 

I personally ran them a little higher.. less comfortable, but also a little less likely to bend the rim on a pothole

 

i check what it says on the tire.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegratuner &raquo;</TD></TR><TR><TD CLASS="quote">i check what it says on the tire.</TD></TR></TABLE>

BAD IDEA. The sidewall of the tire only shows a maximum pressure, which is NOT what you should be setting the tires to.

That's like seeing that your speedometer goes up to 140 mph and concluding that you should be driving 140 mph all the time. (Much as we'd like to... )

 

Rule of thumb is to set air pressure to 35 PSI... Then adjust from there. I personally ran a 215/40/16 Toyo Proxes at 32 front and 25 rear.

But start at 35. Thats the pressure the tire installation center will fill the tire to anyway, unless you ask otherwise.