squid42

I get 50% yupp and 50% nope on this in real life.

For harmless autocross with a light car (Boxster, Z3/4, Miata, S2000), how many of you think that lower tires pressure gets you more grip on a slightly uneven surface? Old airfield and the like.

PedalFaster

The correct answer is "it depends". The optimal pressure depends on the car, the tire, and the setup. Also, the current go-to tire, the Bridgestone RE-71R, is pretty pressure agnostic and has performed well within a maybe 10 psi range on the cars I've used it on.

So -- any of your three answers could be true in a given situation. Can you add an "all of the above" option?

Earlydays

+1

Joe Weinstein

Lower than what?

edfishjr

Agree with Pedalfaster, test it and find out what works best in different situations. Don't be afraid of what seems low or high. Also, note that max grip at the expense of response may not be "fast" and vice-versus.

rymerc

When I ran slicks on a 996 it wanted much lower pressures, 30ish and htrz3 want about 36 with my current setup. If you're not sure, you can chalk around the shoulder of your tire and adjust higher/lower until you're using the shoulder, but not rolling over it.

Mussl Kar

Sometimes I run lower than ***, other times higher. Very rare but inflating to pressures sim to a billiard ball will yield surprising results.