Speed rating

B

beerdog

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Is any driving performance impact noticed if a speed rating less than V is used? I know the difference between the different speed ratings. I just havo desire to go that fast.
 
in general the higher speed rated tires will be more balanced and have a stiffer sidewall. lower speed tires will ride softer but may require more weight to balance and have to be rebalanced more often. if you dont plan on ever going over the rated speed the lower rating is fine. but I personally have had a 81 mph rated tire come apart at 120.....it wasnt fun
 
I was thinking of getting a set of tires at he next lower rating below V which is 130MPH and was wondering if I will notice it is a lesser tire.
 
beerdog said:
I was thinking of getting a set of tires at he next lower rating below V which is 130MPH and was wondering if I will notice it is a lesser tire.
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I don't see a problem. When I bought my Mark VIII, it had Kumhos on it rated H. Your Mark VIII will never go over 130 mph anyways unless it has a tune. When are you going to go 130mph anyways? :p My skinny Firestones up front are rated 112mph. Good enough for me considering I never trap that speed even at the end of the track. :D

Run H or better. That's my two cents. If you notice an H from a V, you have some pretty keen senses. Hell, my car still feels quite controllable with esses up front. ;)
 
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FWIW if you're not going to travel at consistence high speeds there's no point. Especially at the track. The tire (front) isn't gonna heat up that fast.
 
OK, I thought we've discussed this many times before - as it came out with a manufacturer requirement of V, there's more to it than speed. Wouldn't tire construction and the weight of our cars, etc. have something to do with not using a touring tire?
 
I was readng that the V and higher ratings were developed to comply with Autobahn speeds where cars can run continually at very high speeds. Even though we can't legally drive much over 75 in the US, I would think that from a liability standpoint if you sell a car that goes 150 you would not put a lower rated tire on the car. Obviously, stiffer sidwalls and better balancing is never a bad thing.
 
Another interesting tidbit is that the V rated tires always have a lower milage warranty within the same product.
 
Trixie said:
OK, I thought we've discussed this many times before - as it came out with a manufacturer requirement of V, there's more to it than speed. Wouldn't tire construction and the weight of our cars, etc. have something to do with not using a touring tire?
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IMHO the load rating is more important then the speed. From what I saw on a show on this a long time ago, to get the speed rating the tire is placed on a machine like a road force balancer. The tire is spun and must not fly apart (from centrifugal force that causes heat build up internally) at the desired speed rating for a set time period. It does not measure any other characteristic.
 
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Like I said above. If you're not gonna speed for a constant amount of time/distance, your paying for the "name" (V/Z rating) more than anything else. I'd rather get a lower rating tire and get way more miles from it.
 
beerdog said:
I would think that from a liability standpoint if you sell a car that goes 150 you would not put a lower rated tire on the car.
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And again, Mark VIIIs will NOT go 150mph in the stock condition that they were when they rolled off the assembly line. The governor is set at 130 for 3.08 geared Mark VIIIs and 124 for 3.27 geared Mark VIIIs. I see no problem with a tire shop selling H rated tires for a car that will go no faster than H (130mph). On the other hand, if you get an H-rated tire on a Mark VIII that is tuned and the tire blows out at 150 mph(only achievable with a tune), then it is your fault IMO for not relaying the information on the "extras" that were added to the vehicle.
 
You are reading too much. :p

The speed rating comes with better tire construction, period.

Of course you can run a lower speed rated tire, but it will not be as high of quality tire and as susceptible the Mark VIII is to NVH issues, you get what you pay for.
 
driller said:
You are reading too much. :p

The speed rating comes with better tire construction, period.

Of course you can run a lower speed rated tire, but it will not be as high of quality tire and as susceptible the Mark VIII is to NVH issues, you get what you pay for.
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I agree.:)

I have a set of V 225 and a set of H 235 Generals.
They don't make the 235 with a V rating or I would have bought them.

I can't really compare them, because they are different sizes, but both sets feel great so far.:)
 
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