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Old 03-30-2016, 08:45 AM   #81
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I try to run around 0.0077636 warp. Also known as 0.080781 Mach (at 70F), 53.996 knots, 62.137 Mph or as my truck measures it: 100 km/h.




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Old 03-30-2016, 09:32 AM   #82
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Originally Posted by M&K Hoffman View Post
Right below is the heading Technical Specifications, "Other content" which opens up the following .pdf file:

LOAD/INFLATION INFORMATION FOR ST METRIC TRAILER TIRES
That is a old and outdated file and times have changed. There has been a "recent change" in NHTSA requirements to include speed ratings of "L" (75MPH) on all "new ST tires".

Here is a link to to the post explaining the new rules posted by WMTIRE
Ridgway Sport tires?




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Old 03-30-2016, 09:59 AM   #83
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I've found 60-65 very comfortable. Though I try to avoid interstate highways (another discussion for another thread), I find it quite comfortable to get in the far right lane and cruise 65 as others whiz by. Usually much less stressful than running with the big dogs...and their dubious driving techniques... And, heck, I'm on vacation!
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Old 03-30-2016, 10:27 AM   #84
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60 to 65 closer to 60 when hot outside
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Old 03-30-2016, 10:34 AM   #85
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I travel at 80 kph on 2 lane roads or 90 kph on rural 2 lane roads as posted. On the 4 lane roads I travel at 100 kph or slower based upon traffic.
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Old 03-30-2016, 10:54 AM   #86
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Quote:
Originally Posted by CWSWine View Post
That is a old and outdated file and times have changed. There has been a "recent change" in NHTSA requirements to include speed ratings of "L" (75MPH) on all "new ST tires".

Here is a link to to the post explaining the new rules posted by WMTIRE
Ridgway Sport tires?
Merely making the point I do not believe these tires are rated for 106 MPH!
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Old 03-30-2016, 01:22 PM   #87
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Merely making the point I do not believe these tires are rated for 106 MPH!
I called the local tire shop and they verified that they are "R" speed rated which is 106 mph. Now I don't go over 65 with my "L" 75mph tires but it would nice to have that much margin.
Putting tire on 5er or TT that has speed rating of what ever doesn't mean it can be towed that fast nor does say it is safe. The only thing the speed rating on the tries are the tire them self and not what they are they installed on.
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Old 03-30-2016, 01:30 PM   #88
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Quote:
Originally Posted by Kaadk View Post
I try to run around 0.0077636 warp. Also known as 0.080781 Mach (at 70F), 53.996 knots, 62.137 Mph or as my truck measures it: 100 km/h.


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So, do you have one of those fancy new Camco warp measurators? I should get one.
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Old 03-30-2016, 01:34 PM   #89
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So, do you have one of those fancy new Camco warp measurators? I should get one.

Nope, just a MultiCovert app:

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Old 03-30-2016, 01:50 PM   #90
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I called the local tire shop and they verified that they are "R" speed rated which is 106 mph. Now I don't go over 65 with my "L" 75mph tires but it would nice to have that much margin.
I emailed Maxxis, here is their answer:

Michael,
The Maxxis M8008 ST Radial is "Q" speed rated. 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. 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 --
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