205/40/17

[puetato89]

What psi should i have it for best grip(idge)??

[ddongbap]

Less.

[Black Yaris]

I run 40 PSI everyday..... too low of pressure gives too much sidewall flex and will break traction faster while cornering
so low pressure is bad
too high of pressure is bad as well because it will not allow the tire to flex enough and will break traction under hard cornering

[thebarber]

depends on whether youre going in a straight line or turning

on the drag strip i used to lower my XRS tires down to about 20psi

the yaris for auto-x id put them up to about 38 front and 40 rear

DD i keep them around 35-36

[puetato89]

cool thanx guys... my cars in the shop getting fixed but as soon as i get her back ill keep her around 38psi all around...