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Old 08-23-2016, 10:52 AM   #61
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Bottom line is, 'run LTs and don't worry about it'
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Old 08-23-2016, 12:17 PM   #62
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Carlisle 235/80/R16 LR E ~~ 5 installed this am. Dealer bought the Trailer Kings with 3000 miles on 4 and 0 miles on the spare.
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Old 08-23-2016, 01:01 PM   #63
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Quote:
Originally Posted by Airdale View Post
The bottom line is no tire speed restriction other than what's on it's sidewall is official. So, can you get Maxxis to publish anything that would officially counter the TRA restriction for ST tires that are unmarked with a speed restriction?

Marathon & TowMax manufacturers have issued bulletins with instructions on how to increase their speed restrictions to 75 MPH by increasing the tires inflation pressure 10 PSI above the sidewall inflation pressure. This does not increase the tire’s load capacity. It only applies to ST tires with their manufacturer’s approval. Goodyear & Power King seem to be the only ones to risk........
Here's what Maxxis has to say:

-—-——

"High Speed" is used to differentiate the M8008 ST Radial from other products we offer that are intended for industrial and/or commercial use, in slow speed applications. The Maxxis M8008 ST Radial carries a "Q" speed rating. However, according to the Tire and Rim Association, the U.S. tire industry specification authority, inflation pressures and load specifications in general for any ST Radial trailer tires without a service description, regardless of the manufacturer, are designed and rated at 65 MPH. However, if the speed is higher than 65 MPH, the pressure and load need to be adjusted according to the following guidelines:
From 66 to 75 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) but requires no load adjustment.
From 76 to 85 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) and load should be reduced by 10%.
We hope this information is helpful. Thanks for your inquiry and interest in Maxxis Tires.
Best Regards,
Your Maxxis Support Team
--
Maxxis International – USA
Email: MaxxisSupport@maxxis.com | Web: maxxis.com
--—-—

What that seems to say is the 8008 is actually built as a Q rated tire but they officially say for the operator to comply with the TRA 65 mph limit. They do not put a speed rating on the tire. That tells me that running 65 mph is using about 66 percent of the tire capability. That's a good thing.
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Old 08-23-2016, 04:25 PM   #64
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Quote:
Originally Posted by emm-dee View Post
Here's what Maxxis has to say:

-—-——

"High Speed" is used to differentiate the M8008 ST Radial from other products we offer that are intended for industrial and/or commercial use, in slow speed applications. The Maxxis M8008 ST Radial carries a "Q" speed rating. However, according to the Tire and Rim Association, the U.S. tire industry specification authority, inflation pressures and load specifications in general for any ST Radial trailer tires without a service description, regardless of the manufacturer, are designed and rated at 65 MPH. However, if the speed is higher than 65 MPH, the pressure and load need to be adjusted according to the following guidelines:
From 66 to 75 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) but requires no load adjustment.
From 76 to 85 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) and load should be reduced by 10%.
We hope this information is helpful. Thanks for your inquiry and interest in Maxxis Tires.
Best Regards,
Your Maxxis Support Team
--
Maxxis International – USA
Email: MaxxisSupport@maxxis.com | Web: maxxis.com
--—-—

What that seems to say is the 8008 is actually built as a Q rated tire but they officially say for the operator to comply with the TRA 65 mph limit. They do not put a speed rating on the tire. That tells me that running 65 mph is using about 66 percent of the tire capability. That's a good thing.
If it's a "Q" rated tire why do they not put it on the sidewall?

If it's a "Q" rated tire why did they explain the need for extra psi above the tire's sidewall pressure for it to be operated above 65 MPH?

Service descriptions are optional for ST & LT tires. Why do they not use that option to display the "Q" speed rating?

Maxxis can say whatever they want to say but until they make it official their M8088 tires are speed restricted to 65 MPH.
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