I offer this only as info for the always entertaining and ongoing argument....ooops, I mean "discussion" regarding tires. I was out this morning shopping for a new horse trailer, so of course I looked down at the Chinese ST tire, and saw "75mph" on the sidewall.I know nothing at all about these tires other than they were round and black, so this is neither a recommendation nor an indictment of them. "Castle Rock". These were 15" load range D.

In recent years STs have been rated with higher 'speed rating' 65, 75, 81 mph ratings.ST mfgs had to do something to curb the competition of LTs....course speed rating wasn't reason for exodus to LTs. JUNK STs was/is.Heck there was even a 'claim' that an ST was speed rated for 106 mph...course when pressed no MFG. evidence was presented. My 5vr came with 75 mph speed rated tires.So what??I travel at 62 mph where my sweet spot is for towing.

more common than some people think.1) Maxxis ST radials are rated for up to 85mph. I have an email from them with load and pressure requirements above 65mph. you need to adjust inflation pressure and the max load goes down above 652) Carsilie has ST tires rated at 81mph ("M"_) Also have an email from them with the info.3) Goodyear Marathons also can be run at 75mph with a slightly reduced load rating as well.4) Towmax even has ST radials rated at 75mph "L".

The Carlisle tires on my trailer are speed rated N. up to 87 mph.

"Carsilie has ST tires rated at 81mph ("M"_) Also have an email from them with the info."I would be interested in what Carsilie has to say...I run at 65 mph or under 99% of the time. I'm in no hurry...but always good to know what the ratings are. We also monitor tire temp and pressure.

msgtord wrote:The Carlisle tires on my trailer are speed rated N. up to 87 mph.What size are your Carlisle's? 15"? If so, the rating has been reduced since your tires were manufactured.I spoke with a gentleman at Carlisle last Fall concerning the speed ratings of the tires. He said the RH 15" were originally 87mph, but due to our wonderful government placing a tarff on imported 15" ST tires rated at 87mph, the rating has been reduced. Can't recall the 14" models, think they were the same as the 15" (87mph), but don't remember if they were changed also due to the tariff. 16" are rated for 75mph.Has anyone heard any info on a new tire from Carlisle yet? They are suppose to be releasing a new tire this Spring. New tread pattern, slightly lower rolling resistance, but a similar price, weight rating, speed rating, etc to the current RH tires.

75mph ST tire | Good Sam Community

ktmrfs
Explorer II
Mar 22, 2016
more common than some people think.

1) Maxxis ST radials are rated for up to 85mph. I have an email from them with load and pressure requirements above 65mph. you need to adjust inflation pressure and the max load goes down above 65
2) Carsilie has ST tires rated at 81mph ("M"_) Also have an email from them with the info.
3) Goodyear Marathons also can be run at 75mph with a slightly reduced load rating as well.
4) Towmax even has ST radials rated at 75mph "L".
Old-Biscuit
Explorer III
Mar 22, 2016
In recent years STs have been rated with higher 'speed rating'
65, 75, 81 mph ratings.

ST mfgs had to do something to curb the competition of LTs....course speed rating wasn't reason for exodus to LTs. JUNK STs was/is.

Heck there was even a 'claim' that an ST was speed rated for 106 mph...course when pressed no MFG. evidence was presented.

My 5vr came with 75 mph speed rated tires.
So what??

I travel at 62 mph where my sweet spot is for towing.

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75mph ST tire

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