Miata Mailing List: April 1999, Message #45

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On 3/31/99 22:05, Scott Boddy ARCreate@worldnet.att.net wrote:

>Do you take your readings cold? or at op temp?
>I've been running 27# on all four Pilots, *after* warm up. The pressure is
>significantly lower cold.

Tire pressures are nearly always specified cold, because there are too 
many heat-producing variables in each driving situation. Plus, tires 
start to cool off as soon as you park.

27 psi hot will probably give you only 20-23 cold--way too little for 
good handling, and possibly too little to support the car's weight 
safely. Not to mention, the extra heat you'll generate on the highway 
will significantly shorten tire life. 27 cold is probably much closer to 
ideal for street use.

---
Lanny Chambers, St. Louis, USA
'94C

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