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Old 04-07-2016, 08:50 AM   #1
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Constancy LY188 Speed Rating

My 2015 Puma TT has Constancy LY188 ST225/75-15 LRD tires on it. Nowhere on the tire does it state a max speed. No load rating followed by a speed rating, either, such as 113S. I looked them up online, and the manufacturer lists them as 113S. All retailers selling them show them as 113S, meaning S speed rating as well. That's a 112MPH speed rating I'm not buying that for a second. I've always been hesitant to even accelerate beyond 65 to pass a slow moving vehicle! Any thoughts?
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Old 04-07-2016, 09:13 AM   #2
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Not enough time in Recent Discussions to suit me, so….bump.
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Old 04-07-2016, 09:35 AM   #3
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From what I've read- if a ST tire doesn't specifically have a speed rating stamped on it, it is tested to 65mph.
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Old 04-07-2016, 09:44 AM   #4
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From what I've read- if a ST tire doesn't specifically have a speed rating stamped on it, it is tested to 65mph.
That would be my assumption, too. Still leaves me wondering why the manufacturer would clearly state on their website it is rated to 112mph, though???
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Old 04-07-2016, 09:57 AM   #5
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Is that the new ones? I think there was a recent change where new ST tires have to have a speed code stamped on them.

Have you thought about contacting them directly?
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Old 04-07-2016, 10:01 AM   #6
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My 2016 Coachmen Freedom Express 301BLDS came from the factory with Constancy LY188 ST225/75R15 tires installed. They do have both Load Rating and Speed Rating markings:

Speed Rating "L" (75MPH/120km/h MAX.)
Load Range D
Max Load Single 1150 kg (2540 lbs) at 450 kPa (65 psi)
Max Load Dual 1000 kg (2200 lbs) at 450 kPa (65 psi)
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Old 04-07-2016, 10:05 AM   #7
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As I under this the TRA sets the minimum requirements for the ST type tires in the USA. They very recently changed the speed requirement from 65 MPH to 75 MPH, with the additional stipulation that the speed rating had to be marked on the sidewall of the tire. So if your tire is not marked with the speed rating of L it is only rated for 65 MPH.
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Old 04-07-2016, 10:08 AM   #8
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I'm almost certain mine do not have that speed rating listed, but I'll check again later today. Mine were manufactured 4214. Still begs the question- why would the manufacturer list a completely different speed rating on their website than what is on the tire??? For some reason I just get the feeling that when a legit tire company wears out some equipment, they sell it to some of these guys who continue to use it to pump out subpar tires. But that's just me.
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Old 04-07-2016, 10:12 AM   #9
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Originally Posted by clr View Post
As I under this the TRA sets the minimum requirements for the ST type tires in the USA. They very recently changed the speed requirement from 65 MPH to 75 MPH, with the additional stipulation that the speed rating had to be marked on the sidewall of the tire. So if your tire is not marked with the speed rating of L it is only rated for 65 MPH.
That is likely true. Anyone want to make a bet that they didn't make any changes at all to the tires to increase the speed rating. My money is on the 75mph tires being identical to the 65mph tires.
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Old 04-07-2016, 11:14 AM   #10
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Still begs the question- why would the manufacturer list a completely different speed rating on their website than what is on the tire???

Websites are the ugly step-child of most companies and are generally poorly handled.
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