Thinking about ordering a set of PS2's for the front of a 350Z Touring 6 speed, Model with 18" wheels. Since stock tires are 225/45/18 and the PS2's are only offered in 225/40/18 - can they be used on the stock wheels? Also, will use of this size mess up my traction control?

Thanks

 

Sorry, I meant 245/40/18

 

Stock Tire - 225/45R18 Versus new size:- 245/40R18

Section Width: 8.85 in 225 mm vs. 9.64 in 245 mm
Rim Diameter: 18 in 457.2 mm vs. 18 in 457.2 mm
Rim Width Range: 7 - 8.5 in vs. 8 - 9.5 in
Overall Diameter: 25.97 in 659.63 mm
Overall Diameter: 25.71 in 653.03 mm
Sidewall Height: 3.98 in 101.09 mm
Sidewall Height: 3.85 in 97.79 mm
Radius: 12.98 in 329.69 mm
Radius: 12.85 in 326.39 mm
Circumference: 81.58 in 2072.1 mm
Circumference: 80.77 in 2051.5 mm
Revs per Mile: 800.9
Revs per Mile: 809.0
Actual Speed: 60 mph 100 km/h
Speedometer1: 60.6 mph 101. km/h
Speedometer Difference: - Speedometer Difference: 1.011% too fast
Diameter Difference: - Diameter Difference: 1.01%

 

It will be fine. It will not mess up your traction control or VDC. You could put that size all the way around if you wanted to, but your speedo will be off a bit because the rear tires are not as tall as stock. I run 245/45/18 all the way around on mine and my TCS and VDC work perfectly.

 

That only matters on your drive wheels from what I believe.

 

I don't think so, if the front wheels are spinning too much VDC would probably brake them

 

Yes be careful here. I recently replaced my rears witht the same stock size tire, using a 245/45/18 Yoko ES100. Stock 225/45/18's were 50% gone and on the front at 16k miles. Under hard braking or decel from high speeds, the slip light would come on and VDC would brake the fronts, even though I had VDC OFF!!!

What I'm saying is, the tire size may work OK initially but after some tire wear the situation may be different.

 

Don't assume that all tire brands/models in the same size designator [225/45] are exactly the same size when mounted on wheels................rolling radius depends on tire stiffness and inflation pressure and weight on the tire.

 

I was talking about the speedo correction factor, sorry.

 

New special designed front tires for Nissans with wear problem. Check out with dealer

 

You should be fine.

Responsivness might suffer a bit, but overr all grip will be higher in the front.

What are you running rear ? You'll want to keep your car balanced, keep the wheels staggered with similar rubber compoud front and rear.

I run Falken Azenis RT-615 235/40R18 fronts and 255/40R18 rear. When I'm low on fuel, the car gets a bit loose ! Fun

 

I can tell you this ... I run 18" Nismo Wheels on my Z. I used to run Pilot Sports. I just bought a set of PS2's. SIGNIFICANT improvement. You are going to LOVE those tires. They are almost trackable but at a 220 treadwear they're not quite sticky enough. Also they a little slippery when they're cold so give them a few miles (5-10) to warm up. You'll figure that out real quick when you get on it in the first mile of driving! I run Front-275-35/18 & Rear 315-30/18. Best daily driver tires I've ever owned.

 

Great freaking tire. I would say the best at that size. Your VDC should be fine.