Tire questions...

DjSquall · 03-19-2014, 10:42 AM

I have 2 specific questions regarding tires

1) I run Michelin PSS all around. They're apparently a uni-directional tire, (having an outside and an inside). Can they be flipped even temporarily? What should I expect? (I have serious camber wear and can't get new tires for a month)

2) can the toyo R888's be used with our Z's? I understand the tire's OD is larger than stock. Will I need speedometer adjustment? I'm looking to use r888's in 315/30/20 rear and 285/35/20 front (I want to switch to these tires after doing a widebody kit.)

Thanks!

Edit: for reference, I'm currently running 255/30/20's in the front and 305/25/20 on the rear.

MacCool · 03-19-2014, 10:54 AM

I don't think the PSS is directional, just asymmetrical (inside vs outside). You can switch side to side but the side marked "outside" needs to be on the outside.

DjSquall · 03-19-2014, 11:02 AM

Quote:

Originally Posted by MacCool

I don't think the PSS is directional, just asymmetrical (inside vs outside). You can switch side to side but the side marked "outside" needs to be on the outside.

My question is, can I flip them so that the "outside" is on the inside...

Right now, the "inside" of my tire is down to belts, while the "outside" is brand new. Damn camber. Lol.

kenchan · 03-19-2014, 11:25 AM

Quote:

Originally Posted by DjSquall

My question is, can I flip them so that the "outside" is on the inside...

Right now, the "inside" of my tire is down to belts, while the "outside" is brand new. Damn camber. Lol.

the inner treads have reinforcement belts so i dont think you'd want to do that.

DjSquall · 03-19-2014, 12:38 PM

Quote:

Originally Posted by kenchan

the inner treads have reinforcement belts so i dont think you'd want to do that.

Thanks, now I understand! That's one question down!

Joepro · 03-19-2014, 01:14 PM

This is how you adjust the speedo:

Tire size calculator

DjSquall · 03-19-2014, 02:34 PM

Quote:

Originally Posted by Joepro

This is how you adjust the speedo:

Tire size calculator

According to that link, I'm going to be 5.5% larger than the current setup. So if I understand correctly, if my car displays 100km/h, then my actual speed will be 105.5?

And this won't cause any issues with ABS/VDC/auto tranny, right?

MacCool · 03-30-2014, 03:22 PM

I was close to buying the PSS as a tire upgrade, but just couldn't overlook the fact that four Potenza S04s were $800 compared to the $1200 that Tire Rack wanted for the PSS. I can't really judge grip on the S04s yet, bug they are definitely quieter than OEM.

Joepro · 03-30-2014, 08:53 PM

regardless of what that chart says I hated the PSS, S-04 are just as good in my opinion overall, the PSS have a little better off the line grip but the positives stop there. It will be fine IMO.

Rusty · 03-30-2014, 09:56 PM

Quote:

Originally Posted by DjSquall

According to that link, I'm going to be 5.5% larger than the current setup. So if I understand correctly, if my car displays 100km/h, then my actual speed will be 105.5?

And this won't cause any issues with ABS/VDC/auto tranny, right?

You have to keep the front and rear tire heights pretty close to the same diameter for not to get any problems with the nanny controls.

Rusty · 03-30-2014, 09:59 PM

Quote:

Originally Posted by Joepro

regardless of what that chart says I hated the PSS, S-04 are just as good in my opinion overall, the PSS have a little better off the line grip but the positives stop there. It will be fine IMO.

You're an oddball. Go back to drinking Rolling Rock.

Joepro · 03-30-2014, 10:06 PM

Didn't like that crap when it was brewed in Latrobe, look at it now! However, there is a new brewery in Latrobe that is pretty darn good called Four Seasons. I am starting to see some correlation between PSS lovers and their suspension setups or lack there of, the few people I found that agree with me have a good bit of suspension work, and those that love them do not...I plan to do some spl stuff as well, and I will not be on PSS, still have them in the front, just waiting till they are wore out to get a new set of anything else.

03-19-2014, 10:42 AM	#1 (permalink)
DjSquall A True Z Fanatic Join Date: Apr 2010 Location: Tottenham, ON Age: 36 Posts: 1,340 Drives: My first car Rep Power: 22	Tire questions... I have 2 specific questions regarding tires 1) I run Michelin PSS all around. They're apparently a uni-directional tire, (having an outside and an inside). Can they be flipped even temporarily? What should I expect? (I have serious camber wear and can't get new tires for a month) 2) can the toyo R888's be used with our Z's? I understand the tire's OD is larger than stock. Will I need speedometer adjustment? I'm looking to use r888's in 315/30/20 rear and 285/35/20 front (I want to switch to these tires after doing a widebody kit.) Thanks! Edit: for reference, I'm currently running 255/30/20's in the front and 305/25/20 on the rear. __________________ My Z did p0rn Last edited by DjSquall; 03-19-2014 at 10:51 AM.

03-19-2014, 10:54 AM	#2 (permalink)
MacCool A True Z Fanatic Join Date: Apr 2011 Location: Midwest Posts: 1,349 Drives: 370Z PW 2014 Rep Power: 16	I don't think the PSS is directional, just asymmetrical (inside vs outside). You can switch side to side but the side marked "outside" needs to be on the outside. DEpointfive0 likes this.

03-19-2014, 01:14 PM	#6 (permalink)
Joepro A True Z Fanatic Join Date: Aug 2012 Location: Athens ohio Posts: 1,213 Drives: Company car Rep Power: 34	This is how you adjust the speedo: Tire size calculator __________________ Swift\|Koni\|SPC\| FI CBE\|Z1\|Stillen\|Sbend\|Zspeed\|R/T Tuned\|523 whp\|458 tq\|10.5 psi\|SOLD Joepro's Journal\|Joepro's Boosted Performance Build \|Pittsburgh-Western-Pa-Ohio-Wv-Group

03-30-2014, 08:53 PM	#9 (permalink)
Joepro A True Z Fanatic Join Date: Aug 2012 Location: Athens ohio Posts: 1,213 Drives: Company car Rep Power: 34	regardless of what that chart says I hated the PSS, S-04 are just as good in my opinion overall, the PSS have a little better off the line grip but the positives stop there. It will be fine IMO. __________________ Swift\|Koni\|SPC\| FI CBE\|Z1\|Stillen\|Sbend\|Zspeed\|R/T Tuned\|523 whp\|458 tq\|10.5 psi\|SOLD Joepro's Journal\|Joepro's Boosted Performance Build \|Pittsburgh-Western-Pa-Ohio-Wv-Group

03-30-2014, 10:06 PM	#12 (permalink)
Joepro A True Z Fanatic Join Date: Aug 2012 Location: Athens ohio Posts: 1,213 Drives: Company car Rep Power: 34	Didn't like that crap when it was brewed in Latrobe, look at it now! However, there is a new brewery in Latrobe that is pretty darn good called Four Seasons. I am starting to see some correlation between PSS lovers and their suspension setups or lack there of, the few people I found that agree with me have a good bit of suspension work, and those that love them do not...I plan to do some spl stuff as well, and I will not be on PSS, still have them in the front, just waiting till they are wore out to get a new set of anything else. __________________ Swift\|Koni\|SPC\| FI CBE\|Z1\|Stillen\|Sbend\|Zspeed\|R/T Tuned\|523 whp\|458 tq\|10.5 psi\|SOLD Joepro's Journal\|Joepro's Boosted Performance Build \|Pittsburgh-Western-Pa-Ohio-Wv-Group

03-30-2014, 03:22 PM	#8 (permalink)
MacCool A True Z Fanatic Join Date: Apr 2011 Location: Midwest Posts: 1,349 Drives: 370Z PW 2014 Rep Power: 16	I was close to buying the PSS as a tire upgrade, but just couldn't overlook the fact that four Potenza S04s were $800 compared to the $1200 that Tire Rack wanted for the PSS. I can't really judge grip on the S04s yet, bug they are definitely quieter than OEM.

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