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Discussion Starter · #1 ·
I need new tires and will be upgrading from the stock pirellis to Michelin ps4s and am wondering if I can get wider tires and whether it would be a good choice or not. I have 15mm spacers. Also, where is the best and cheapest place to buy Michelin ps4s and when is the best time to buy them? Any sales going on right now?
 

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I need new tires and will be upgrading from the stock pirellis to Michelin ps4s and am wondering if I can get wider tires and whether it would be a good choice or not. I have 15mm spacers. Also, where is the best and cheapest place to buy Michelin ps4s and when is the best time to buy them? Any sales going on right now?
I am looking to do this as well. I want the squared off look without the stretch or poke.
 

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Does tire rack have 2 year road side hazard like the audi dealership where they replace the tire if it is damaged?
yes. I just purchased PS4’s from Tire Rack like a month ago. 255/30/20 front and 325/25/21 rear
 

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I did a ton of research and had a problem w the rears if I were to keep 20” diameter w all the tire brands. Once you get go up from 305 width it becomes a problem. PS4’s don’t come in a 315/30/20, 325/30/20 or 335/30/20. Super sports are available in a 335/30/20 but then they don’t come in a 255/30/20 up front. Only a 265/30/20. But then the overall diameter changes too much. So I started exploring other tire brands and they had even less choices.

that’s when I decided to bump up my rears to 21” and problem solved. 255/30/20 and 325/25/21 maintain almost the same overall diameter as OEM.
 

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Discussion Starter · #10 ·

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If you run inconsistent overall diameter between front and rear (ie: stock front/ larger or smaller OD rear) you will likely overheat your dif. not cheap.
 

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I thought you said they don't have 315/30/20 PS4s? Would those fit on a stock wheel and work with a 255/30/20 front?
They have a 315/30/20 PS4. I didn’t go w a 315 bc my rear wheel is 12” wide so I needed bigger
 

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And my diameters on my setup are perfect and are way under the 5% overall diameter tolerance.

if I were to keep my oem wheels on then I would go 255/30/20 in front and 315/30/20 in the rear
 

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And my diameters on my setup are perfect and are way under the 5% overall diameter tolerance.

if I were to keep my oem wheels on then I would go 255/30/20 in front and 315/30/20 in the rear
Thanks for the info...can you post a pic of your setup? What did you do for suspension?
 

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I really like the PS4S as well and am in need of new tires.

I think i am going to do 315/30/20 rear and 255/30/20 front. I'd like to do 325 rear but its not an option in a 30 profile.
 

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Discussion Starter · #16 ·
I really like the PS4S as well and am in need of new tires.

I think i am going to do 315/30/20 rear and 255/30/20 front. I'd like to do 325 rear but its not an option in a 30 profile.
Stock setup? Any spacers?
 

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Running wider than designed tires on a rim that is designed for stock will cause one to have more sidewall flex than the stock tires. This is not overly dangerous but will increase the turn in response time when waiting for the 'flex' in the sidewall to take up. That stretch or poke that Garat mentions earlier is actually a good thing for handling but agree the wider tire looks much better.
 
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