How fast is too fast - Page 6

JoeNanMinn · 07-16-2015, 11:53 PM

St tires are rated for 65. But I get passed everyday on the freeways by RV delivery drivers delivering new units driving 75-80 or more. Its a wonder new units get to their destinations in one piece. Do RV delivery services even realize that the ST tires are only rated for 65 mph?

kandl · 07-17-2015, 03:12 AM

Quote:

Originally Posted by Herk7769

So I checked this out and it is true:

Mickey Thompson Tires - Load and Speed Ratings

http://www.herculestire.com/tire-gal...er-str/#loaded

Learn something new every day.

PS - For full disclosure these are also made in China.

There are always exceptions. Those are unique tires. Even GY has in past maintained that pumping up a ST tire can increase its speed rating. Kumho make a 14-inch trailer tire with a "Q" speed rating. Right... totally practical... like I'm gonna tow a trailer at 99 MPH.

We shouldn't think it a stretch to suggest that the vast majority of ST tires have published or molded in specifications recommending that speed be limited to 65 MPH. That's not a bad thing. There's more than enough banzai foolishness being generated on the roads today without having 50 or 60 feet of truck and RV inadvertently trying to be the first to Hades' realm. Dunno... maybe it's a cultural thing.

We hit the road and we maintain 55-65 for hrs on end. We get there when we get there.

SYE · 07-17-2015, 03:34 AM

If you have ST Tires, they are rated for a Maximum speed of 65mph.

kandl · 07-17-2015, 04:05 AM

Quote:

Originally Posted by SYE

If you have ST Tires, they are rated for a Maximum speed of 65mph.

The Hercules tires that Herk made ref to are ST tires with a "L" speed rating. These tires are rated for speeds up to 75 MPH.

mbCik · 07-17-2015, 04:43 AM

I typically drive the speed limit or about 5mph faster. But also depends on what the speed limit is and highway conditions. I always try to remind myself that I'm on vacation so no need to rush and stress myself out.

siskom · 07-17-2015, 10:07 AM

There have been many posts in the forum about tires and speed does come in to play. Like it was mentioned "just because you can does't mean you should". If you keep your speed around 60 plus or minus 3mph you should be safe with your tires and can probably control your rig in a crisis. Let's face it if you need to get somewhere that fast take a plane or a sports car, these campers TT,5TH and MH are not for going anywhere quick.

Stovebolt · 07-17-2015, 10:41 AM

I used to be in a hurry. Hurry to turn 16 and get a driver's license, hurry to get to 21 and be able to go to a bar, hurry home from work to I could hurry and party somewhere, then I got married and then I got old. Now I'm not in a hurry to slide on a banana peel. Life is short, slow down and enjoy it, before you know it, it will be over.

**Tireman9** · 07-17-2015, 07:50 PM

The industry guidelines for ST type tires is 65 mph max. Now if a manufacturer PUBLISHES some document like Goodyear with the 75 mph max for their Marathons or Sailun with their L speed rated ST235/85R16 LR-G tire that is OK and they are allowed to do that.

BUT just as you can't use say oil filter specs from Ford on a Chevy you can not apply the GY document or the Sailun speed rating to other tires.

OldCoot · 07-17-2015, 08:07 PM

Quote:

Originally Posted by CAT-RN

Good chance if some guy pulling a travel trailer at 80 mph he does not own it. He probably moving it from the factory to the dealer. Another good reason to buy your RV's in or near the town their built in.

Russell.

How do you think they get from the factory to the dealer?

doc73 · 07-17-2015, 08:15 PM

I tow the posted limit IF the conditions allow for it. If the posted limit is over 60 / 65 then I am 60 to 65 max.. Usually 60. I have a TPMS and keep the pressures right. I have often shook my head at the TT and motorhomes in the hammer lane going 75. I do often wonder to myself how many "China Bombs" are 99% due to not checking pressures and or the high speeds.. Any tire can fail and at any time. But push it beyond its designs and pay the price possibly.

jlgail4309 · 07-18-2015, 10:12 AM

I got kumho 857 after one of the factory tire deformed. I just didn't like the thought of maxing the tire out at 65 all the time. Every time I would stop the cheap tires were so hot it would burn my hand. I wonder if maxing the st tires out at 65 could be the problem.

Stovebolt · 07-18-2015, 12:28 PM

Quote:

Originally Posted by jlgail4309

I got kumho 857 after one of the factory tire deformed. I just didn't like the thought of maxing the tire out at 65 all the time. Every time I would stop the cheap tires were so hot it would burn my hand. I wonder if maxing the st tires out at 65 could be the problem.

The lower the air pressure in the tire the hotter they will get. Max air pressure will keep them a lot cooler, that's why tires that are low on air blow out more often than those that are up to the air pressure required and also is the reason the auto manufacturers were forced to put tire monitoring in their cars due to the fact people never seem to be able to do proper maintenance on their own.

**Tireman9** · 07-18-2015, 01:52 PM

Quote:

Originally Posted by jlgail4309

I got kumho 857 after one of the factory tire deformed. I just didn't like the thought of maxing the tire out at 65 all the time. Every time I would stop the cheap tires were so hot it would burn my hand. I wonder if maxing the st tires out at 65 could be the problem.

If your tires are too hot to hold your hand on them for about 5 seconds then YOU HAVE A PROBLEM

- Your pressure is too low for the load
and/or
- You are driving too fast or too close to a tire max speed rating
and/or
- Your tires are undersized for the actual load you carry

Re "deformed" tire. Have you captured a photo? Did you record the full DOT serial and have you filed a complaint with NHTSA?

jlgail4309 · 07-18-2015, 09:06 PM

Not sure the problem was with the factory tires. I put the Kumho 857 problem went away. Seems like it handles better with less bounce rides better. I did't take a picture or check the dot the trailer was almost new. I just thought the tires was cheapest they could put on the trailer . I read about all the blow outs and being a single axle. Blow out didn't sound good.

dannyabear · 07-18-2015, 09:46 PM

I couldn't get the Kumhos so i went with the Hankook RA08 On my 2703ws; much better, a true load range D, 8 ply, 99 mph rated and 2100# capacity. Whats not to like about them

jlgail4309 · 07-19-2015, 06:53 AM

I think the tire that are rated for the higher speed are a lot better. At least they are not maxed out on speed and load. It must me all about the money on new trailers. It a real problem on new trailers.

nomad297 · 07-19-2015, 07:14 AM

Quote:

Originally Posted by Flybob

X3 65

Carlisle makes ST tires rated for 75 mph.

Bruce

elind · 07-19-2015, 08:43 AM

Quote:

Originally Posted by jlgail4309

I got kumho 857 after one of the factory tire deformed. I just didn't like the thought of maxing the tire out at 65 all the time. Every time I would stop the cheap tires were so hot it would burn my hand. I wonder if maxing the st tires out at 65 could be the problem.

I max out my 16" E Westlakes at 80psi and when I temp them after stopping they're only at 105 degrees. I would guess that the lower pressure is going to create increased tire flex and greater heat.

nomad297 · 07-19-2015, 09:10 AM

Quote:

Originally Posted by elind

when I temp them after stopping they're only at 105 degrees.

How about on those days when you're in Arizona and it's 110 degrees outside?

Bruce

elind · 07-19-2015, 11:07 AM

Quote:

Originally Posted by nomad297

How about on those days when you're in Arizona and it's 110 degrees outside?

Bruce

Sure the temp will be higher seeing it was 70-80 degrees when I did the check. But it still will be cool enough to leave my hand on it at Arizona temps.

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