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Old 01-18-2010, 10:43 PM   #15
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is the tire for a tradewind the same size as other airstream models?
Yes.

For your trailer, ST 225/75 R15 load range C

Andy
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Old 06-24-2010, 11:57 PM   #16
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Not all tires are alike...

Ok so I am a newbie on the board, but I know something about tires. I use to work for PACCAR, they build Kenworth and Peterbilt trucks around the world. I worked in the parts division and also was a supervisor in the roadside services call center. I have spent many hours with tire people ranging from recappers to top of the line Michelin people and learned a lot about design and rubber compounds. I have seen people post about using LT tires on their AS. You wont catch me doing that as I have had a blow out that cost me more than a tire in repairs. You see ST tires are built for trailers. The compound is different and the sidewalls are different from LT's. Some say, "why would they do that?" Well you see trailers tend to kiss curbs or drop off edges more often the cars and when you figure the stress and pressure put on a sidewall on a trailer it is a lot. No, i dont have a number for a lot any more but I have seen fluid dynamics testing demonstrating it. On the other hand how many of us have had to cut it hard and tight to get into the camp site or storage space you keep your trailer at? What do you think is happening to your tires on the trailers as the axles are forced to work against each other? Ok, the single axle guys get a pass on this. Thats right, check the asphalt around the trailer when you turn around in a parking lot or into a parking spot, your tandem axles just left a couple of black marks. I have friends with a $60,000 Open Road 5th wheel that when the storage people parked it, using a small yard tractor, they bent the frame and an axle totaling the camper. Yes it is a 12,000lb camper but it is the same thing. ST tires are build to handle the abuse we can dish out as eager Americans to hit the open road and relax in our campers. I thought I would pass this on because, unlike me just starting and buying a 35 yo starter AS, some of you have some incredible pieces of art in restored unis and other have newer units over $50k. You bought the best camper in the world, treat it like you love it. I am a big guy and to protect my feet I by the right shoe for my feet, not just what ever I find that is round and fits me.

Ok, off my soap box now... I prefer ST radials for the temps at high speed but bias tires will serve your purpose too. Just dont expect to find them easily why driving across rural America and you need a new tire.
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Old 06-25-2010, 12:23 AM   #17
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The forces due to turning a dual axle trailer cannot be any higher than those caused by fast cornering as both are limited by friction.

Trailer tire sidewalls can indeed get abused by inattentive drivers - but the same is true for trucks, particularly 4wd.

There's nothing magical about ST tires... and considering the number of blowouts & separation problems people describe, I'm taking my chances with Michelin LT tires - just like my trailer came with new nearly 40 years ago.

- Bart
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Old 06-25-2010, 01:49 AM   #18
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Quote:
The forces due to turning a dual axle trailer cannot be any higher than those caused by fast cornering as both are limited by friction.
Bart,

I have to disagree here - during 'fast cornering', the rear tires on multiple axle trailers are tracking the forward tires...during low speed turning, as in maneuvering around a parking lot at extreme angles, one set of tires (if not both) are always being 'scuffed' as evidenced by the 'rubber marks left on the road'....

I'm also in the 'bias ply' camp for our 78 AS...we're using 7.00 -15's as per original, and they weren't difficult to find at all...this size bias ply tire has been around for ages, and is still popular on all kinds of smaller trailers - you can find all kinds of tires in this size on the web...

Bias ply tires 'track' great for trailers, their intended purpose - sure, they do have some limitations (rolling resistance, etc.) as noted above when compared with radial types, but it's hard to argue with success -

I think MRHottinger's correct, trailer tires are built to take much more sidewall punishment than LT radials...LT's can easily get their sidewalls damaged, just ask your buddy with that new pickup that runs some rocky trails, I seen it more than once - a sharp rock, etc., can bruise or puncture those vulnerable sidewalls...

BTW...MRHottinger - I dealt with your old employer, PACCAR for many years from the Late 60's to the mid 80's, running the parts dept. for the KW dealer in the SF Bay Area - lots of memories from those years, meeting other Parts Mgr's from all over the country, and the occasional visits to Seattle, KC, Chillicothe, etc...some great times...

Regards, Ray
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Old 06-25-2010, 08:17 AM   #19
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Bart, I was like you and felt all was the same. Step into a fluids dynamics lab and you will be surprised. There a a big differance in sidewall abuse as LT side wall flex leads to more instability in panic turn situation (nobody ever wants to be there), trailer ride (will bounce more) and how much they roll under in tight turn scuffing the side more. LT tires are not built for high speed turns, they are built to give and forgive on rough terrain to give the most traction available. Even the standard LT tire is not adequate for somebody going to the rough trails, they may tires that resist sidewall damage from sharp rocks too. My truck I built while living in Colo Spgs had 2 sets of tires. everyday 4x4 LT tires and my trail tires and at that time I did not know what I know about tires now. Performace tires are built for high speed cornering and that is a different story too because the sidewalls are tougher, ride rougher and have a soft compund that scuffs off fast. Also TR compounds are built to give you the least rolling resistance while towing and the longest tread life in high scuff situations.

If you notice the tires on tractor trailer application you will see a differance as they have 3 types of tires; steer tires, drive tires and trailer tires. Now I have seen many people put used steer tires on trailers to get by but the real fleet manager will not put drive tires on trailers. Steer tires are built for low rolling resistance and stiff sidewalls for hard full lock tire scuffing turns. Drive tires are built for heavy traction application as well as load but not as much shoulder design because they seldom have to roll on the sidewalls, rolling resistance is higher. Trailer tires are built to be followers, straight and true, have enough sidewall strength to resist the heavy forces applied during dock parking procedure and yet give a smooth ride and very low rolling resistance.

Almost last note. I have seen the testing but cant speak confidantly about is that TR compounds are built to resist UV deteriation more that Passanger and LT tires because they tend to be parked for longer periods of time with constant abuse from the sun. I might believe that but I also think all name brand manufactures build the tires with UV resistance built in. I have put a few miles on my trailer between the coasts and in the midwest and have went through a 4 sets of tires and have had two blow outs, one LT and one POS TR that we all know had problems.

Again, seeing a tire at work and watching the colors change in a fluid dynamics lab is awesome. The tires are built for the application I would love to work in a lab like that but then I hate math so maybe I could just clean the place up. Disclaimer: this is radial information only, bias is a whole different world and if the technology works why worry.

IMHO-- Ultimately we are responsible owners and will use what we like and trust. So lets keep on the good fight and spend many happy miles and nights in our homes away from home, well in some cases - just home!
"BTW...MRHottinger - I dealt with your old employer, PACCAR for many years from the Late 60's to the mid 80's, running the parts dept. for the KW dealer in the SF Bay Area - lots of memories from those years, meeting other Parts Mgr's from all over the country, and the occasional visits to Seattle, KC, Chillicothe, etc...some great times..."
Yep, Ray I miss it some too. In Seattle I was a Call Center Supervisor, Regional Manager for National Maintenance then moved to Georgia to be Distribution Manager at the warehouse then to Regional Manager for PACCAR Brands in TN/KY/OH/WV/VA/MD/DE. Been to all the facilities in US and 3 outside the US. Miss it some because some of the PM's were crazy.
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Old 06-25-2010, 08:46 AM   #20
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So has anybody have experience with Carlisle tires? Good/bad/indifferent? I have them on a 4 wheel utility trailer and didn't have trouble until they were 7 years old. I replaced them with the same load range "C" Carlisle tire - $59 each last summer. Just curious if these would be good enough for the travel trailer.
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Old 06-25-2010, 11:31 AM   #21
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During cornering, the forces on a trailer tire cannot exceed the load on the tire times the effective coefficient of friction - and this is true for cars, trucks, trailers, .... in this video, you can see even the low profile tire sidewalls deflecting significantly during an autocross...

YouTube - TorqueSteers Sunday run - Passenger side rear tire view

Yes, if you bang your trailer against curbs, etc., it pays to have sturdier sidewalls. The predominant tire failure mode seems to be delamination of the tire internally, however - so I'll focus on using a good quality tire to avoid that problem.

In the future, I may shift to 16" wheels and load range E tires - if those Michelin tires can take my 7000 lb 4x4 off-road, they'll handle the Airstream.

- Bart
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Old 06-25-2010, 11:43 AM   #22
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Originally Posted by barts View Post
During cornering, the forces on a trailer tire cannot exceed the load on the tire times the effective coefficient of friction - and this is true for cars, trucks, trailers, .... in this video, you can see even the low profile tire sidewalls deflecting significantly during an autocross...

YouTube - TorqueSteers Sunday run - Passenger side rear tire view

Yes, if you bang your trailer against curbs, etc., it pays to have sturdier sidewalls. The predominant tire failure mode seems to be delamination of the tire internally, however - so I'll focus on using a good quality tire to avoid that problem.

In the future, I may shift to 16" wheels and load range E tires - if those Michelin tires can take my 7000 lb 4x4 off-road, they'll handle the Airstream.

- Bart
Bart.



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Old 06-27-2010, 06:36 PM   #23
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Angry Carlisle Tires

Quote:
Originally Posted by crispyboy View Post
So has anybody have experience with Carlisle tires? Good/bad/indifferent? I have them on a 4 wheel utility trailer and didn't have trouble until they were 7 years old. I replaced them with the same load range "C" Carlisle tire - $59 each last summer. Just curious if these would be good enough for the travel trailer.
Came back today from a weekend camp about 40 Miles up the road,lost tread on 1 Carlisle on the trip up,installed the spare.On the way home,another 1 went,didn`t even notice till I saw the wheelwell trim flapping in the wind.Pulled it on home on 3 1/2 tires.
Checked the DOT date,1 was 3yrs.3 mths.,other was 3yrs7 mths.
Looks like I`ll be replacing with Maxxis. Dave
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