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Tire Speed Rating Preference

 
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  #1 (permalink)  
Old 01 Feb 2013, 05:12 pm
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Question Tire Speed Rating Preference

So who here is Running ZR rated tires?

Or do you just look for the cheapest available?


I have the ZR's on my GT and my wifes NA.

Both are 235 40 ZR 18's

I have the Cont DWS on mine, The wife is running Falkens.

We just prefer the less road noise as opposed to HR's.
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Old 01 Feb 2013, 05:25 pm
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Default Re: Tire Speed Rating Preference

Mine has 205/50ZR17 89w 's on it. They are Riken Raptors. I'm not familiar with this company, but I like the way these look and handle. They were on the car when I purchased in December.
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Old 01 Feb 2013, 06:00 pm
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Default Re: Tire Speed Rating Preference

I never use ZR tyres, these are for 240 km/hour and up. That's unneccesary for my cars. I usually end up with V tyres. Allthough my stock tyres on the Civic where ZR's I bought V's. They 're cheaper and just fine.
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Old 01 Feb 2013, 06:01 pm
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Default Re: Tire Speed Rating Preference

The PT on a good day might go 130mph?

So a Z rated tire 149mph + for a PT is wishful thinking?

People should shop for tires that fit there criterion. The speed rating for 90% of PT owners may be the least of their thoughts when shopping for a tire?

But to answer the question it depends on what season, how I am planning to drive, and any special attributes in the tire I may want. And criterion changes all the time.

I have a set of Sumitomo HTR Z II lined up for our PT. They are Ultra High Performance Summer. I look for traction and tread design first before the speed rating with these.

The Tire rack website is filled with great information and the staff is very helpful and knowledgeable about choosing the right tire for your PT.

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Old 01 Feb 2013, 09:47 pm
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Default Re: Tire Speed Rating Preference

I just bought the best tire I could afford. I didn't have a whole lot to spend but Discount Tire made me a decent deal and I am very happy. Being that I have a NA I wasn't worried about speed rating lol.
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Old 01 Feb 2013, 09:54 pm
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Default Re: Tire Speed Rating Preference

I went with the DWS tires after I did a 180 in slush on the factory Goodyear's. They are the best tires I've ever owned of over 200k miles of driving PTs. I didn't buy them for the speed rating but they definitely handle well too.
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Old 01 Feb 2013, 10:06 pm
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Default Re: Tire Speed Rating Preference

Won't the load rating be a more important thing on our tires?
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Old 02 Feb 2013, 02:22 pm
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Default Re: Tire Speed Rating Preference

I think all passenger tires (with one-two obscure exceptions) are Load Range "C"

To get load at speed you need to overinflate (so to speak) speed rated tires,
reason for high pressure stamped on these tires.
(For normal usage DON'T use sidewall pressure, use Chrysler recommendations!!!!!!!!!!)

Tires WILL support much higher load than rating, provided you grossly overinflate. Face will flex (of course) and you'll get center wear and bruising resistance will drop.

Rims can and do crack before tires explode- You see this on 1/2 ton pickups where they're loaded like an army truck- (passenger) tires inflated to 80 PSI
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Old 02 Feb 2013, 06:55 pm
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Default Re: Tire Speed Rating Preference

Quote:
Originally Posted by UptownSport View Post
I think all passenger tires (with one-two obscure exceptions) are Load Range "C"

To get load at speed you need to overinflate (so to speak) speed rated tires,
reason for high pressure stamped on these tires.
(For normal usage DON'T use sidewall pressure, use Chrysler recommendations!!!!!!!!!!)

Tires WILL support much higher load than rating, provided you grossly overinflate. Face will flex (of course) and you'll get center wear and bruising resistance will drop.

Rims can and do crack before tires explode- You see this on 1/2 ton pickups where they're loaded like an army truck- (passenger) tires inflated to 80 PSI
I find if you put a 60 psi tire on a car that was made for a 35 psi tire and use that as a inflation guide. You are going to be under inflated. Because the weight of the vehicle has nothing to do with tire inflation guide. Instead it depends on when it was manufactured and the tires of that time psi rating. The tires with high psi ratings are that way because the maker found it cheaper to hold up the car with air than rubber. Inflate to about 6 lbs under that tire's ratings.
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Old 03 Feb 2013, 03:16 pm
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Default Re: Tire Speed Rating Preference

Quote:
Originally Posted by Busted_PT View Post
Because the weight of the vehicle has nothing to do with tire inflation guide.
I know you meant to write;

Required tire pressure is directly contingent on vehicle weight ...
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