Just got my Yoko's put on yesterday and was wondering what everyone seems to find as the best psi for the tires. right now they're at 30 which was what my tire guy inflated them too. TIA

 

It will vary depending on your MINI- MC vs MCS and your load 2 vs 4 people.
Each car has a door jam side label (driver's side) that has the range based on the size of the rim and the size of the tire. Yoko ES 100 comes in a variety of sizes and so you look for the closest match to what you have and read the numbers off the table.

For me my rims are 17x7 and tires are 215/45-17 so with two people most of the time I run about 33 psi cold front and back. If I want load of 4 people I might increase psi to about 37 front and back. If I take my car to the track I might change the psi to 32 in front and 38 in back and adjust that day up and down for track conditions in an attempt to control understeer and be as neutral in handling as possible. Best readings for tire temps at the track from a tire temp monitor on the tire sides and mid tread.

 

>>Just got my Yoko's put on yesterday and was wondering what everyone seems to find as the best psi for the tires. right now they're at 30 which was what my tire guy inflated them too. TIA

I run 32 all around for everyday. At autocross, I run 38 rear, 35 front on my stock suspension (this helps the rear rotate a bit easier). On track, I currently run 35-36 evenly...

stock 16" v-spoke rims, btw

 

32psi front and back cold

usually 2 people..sometimes three

17 inch rims

 

Thanks everyone, I should've mentioned that I have a MCS with stock tire sizes. Also, nine times out of ten I'm by myself in my car but at most one other person. Thanks again!

 

I got 205/45/17 avs es 100s on my MC; 32 front, 31 rear.

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-goin440 IB/IB MC on 17" Volks

 

I prefer the ride and handling of my Yoko's at 33psi front and back.