Bias vs Radial Tires - Fiberglass RV


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Old 04-05-2007, 05:14 PM   #1
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Bias vs Radial Tires. Would Bias tires solve any of the problems the eggs have been having with tires?

Our Scamp has 13" Radials but I have noticed you can get a higher load range in 13" with Bias than many sell in Radials. Would this work? Be a better obtion?
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Old 04-05-2007, 06:22 PM   #2
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Quote:
Bias vs Radial Tires. Would Bias tires solve any of the problems the eggs have been having with tires?

Our Scamp has 13" Radials but I have noticed you can get a higher load range in 13" with Bias than many sell in Radials. Would this work? Be a better obtion?
NO!!!

Trust me, Bias tires in a light trailer, are BAD karma

The old school bias tires flatspot after being parked for more then a few hours, and at ~1500lbs per tire, will take 30-50 miles to fully warm up and round out again. Until then, imagine the contents of your trailer as a marble inside a martini shaker, operated by a hyperactive bartender with a caffeine addiction

I have bias ply's on one of the DD's currently, and there is a reason that all modern highway tires are radial construction


Matt
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Old 04-05-2007, 06:53 PM   #3
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A higher load range than required seems like the wrong answer, and makes me wonder what the question was in the first place: what problem would be solved by this? Is the problem tire too small for the load, too poorly constructed, or being asked to do too much by poor suspension, perhaps?

Quote:
... there is a reason that all modern highway tires are radial construction
I second that thought! Since the tires on every axle (including the trailer) of the biggest rigs are now normally radials, I think the message is quite clear. Even off-road tires for serious applications (large agricultural tractors, open pit mine trucks the size of your house...) have been radials for years.

I suspect that the availability of small tires in high load ranges as bias plys (and not radials) indicates only that mainstream tire manufacturers see insufficient market for those size/load applications to bother making radials for them. I doubt there are many (if any) eggs which need a load range higher than C (50 psi inflation pressure) to meet the load requirements in a reasonable tire size, and only trailers with unusually small tires (such as the Fiber Stream, due to its tandem axles) would need a size outside of the range covered by the all-radial Goodyear Marathon (for an example) line.
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Old 04-06-2007, 06:43 AM   #4
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There's a conversation going on over at CasitaForum about Kumho tires. Evidently Gene (webmaster) runs them and is very satisfied. Also within this topic is a link to a Loading Chart.

Interesting Fact about Trailer Tires
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Old 04-06-2007, 12:50 PM   #5
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I've read hundreds of opinions on the subject of bias versus radial tires on travel trailers and pop-ups on many different websites. The one thing most people agree on is that radial tires are the best way to go, as long as you don't have weight concerns. Another thing I've found that most folks agree on is that Carlisle tires are pure JUNK. I've read story after story where the Carlisle's either wore out after 5,000 miles or the treads started to seperate from the tire and other stories of blowouts on tires with barely any mileage on them.

The one tire I've found that everyone agrees is an excellent tire is Duro. I've been running Duro "ST" radial tires on my trailers for the past 5 years and can honestly say that they're the BEST tire you can put on your TT, bar none. I had Duro's on my pop-up camper and they still looked brand new after 7,000 miles when I sold that trailer.

Here's the tires I recently put on my U-Haul...

http://www.tiresunlimited.com/images/duro/DS2100.jpg

Here's where I got 'em... (and the folks there are GREAT!)

http://www.tiresunlimited.com/ALL%20TIRES/...er_tires_ST.htm


They cost a bit more than the Carlisle's, but you certainly get what you pay for... tough, smooth-trailing tires that LAST!!!
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Old 04-06-2007, 01:46 PM   #6
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Quote:
There's a conversation going on over at CasitaForum about Kumho tires. Evidently Gene (webmaster) runs them and is very satisfied. Also within this topic is a link to a Loading Chart.

Interesting Fact about Trailer Tires
While people have provided working links to the Casita Forum in the past, I have noticed recently that such links produce an error message, requesting registration. The link is not to some special member feature; it is simply to a specific topic (thread). Now, I can't even browse down from the top level of the forum without registering... so I registered my Boler in the Casita forum! Now I am required to log in to follow the link, but it works...

For those not wanting to register at Casita Forum, the loading chart is the often-referenced Goodyear RV Load/Inflation Information, which is linked from various points in Goodyear's RV section, including the Marathon trailer tire page.
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Old 04-06-2007, 03:06 PM   #7
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Being new to this and not having taken our 13 Scamp on it's inaugural trip yet(still in renovation), I haven't even thought about the tires yet.
Tires had just been replaced when I bought it and it looks like I have Buck's dreaded Carlisle USA Trail tires.

What do you inflate these tires to for a typical Scamp 13? Looks like the range is 32-50 PSI on the tire sidewall
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Old 04-06-2007, 07:20 PM   #8
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Hi,

My Casita came with Marathons...one of which threw a chunk of rubber during our third long trip...this time to the Maratimes last summer (less than 10,000 miles and a little over a year old-tire pressure checked evertime they rolled). I switched to Kumhos as they have a D load range.

Question: What tires do heavier trailers like Bigfoot 21's come standard with?

Rand:-)
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Old 04-06-2007, 08:23 PM   #9
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Quote:
While people have provided working links to the Casita Forum in the past, I have noticed recently that such links produce an error message, requesting registration.
Brian, et al...I spoke with Gene about the error some were receiving trying to view the linked topics, and YES, he has now restricted a number of the forums to members only. Blame the hackers, crackers and spam bots. He's sorry, but "guests" were really starting to play havoc with his forum. Since FiberglassRV and CasitaForum both use the same brand software, webguy here will PROBABLY be looking to do the same IN THE FUTURE maybe. I'll continue to post links when it's appropriate, but if you're not a member of the CasitaForum you probably won't be able to view the info...but, we're kind of used to that because of YahooScampers, Bolerama, etc.

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Old 04-06-2007, 08:47 PM   #10
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I hate to be a wise guy with all the above opinions but, is that why UHaul still uses bias belt tires?? I had some UHauls on my 17' Casita that I bought from a tire guy that lost his contract with Uhaul, he balanced them for me and I ran them for about 20,000 miles before one of them wore out. The other is my spare. If I could find another set of them I buy them in a heartbeat but they are made exclusively for UHaul. Uhaul does not want to be out on the road fixing tires so through a bunch of experimenting they have found one that works for them. Ya can't argue with success
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Old 04-07-2007, 07:39 AM   #11
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Would Bias tires solve any of the problems the eggs have been having with tires?
Specifically, to what problems are you referring? I wasn't aware of any.

Roger
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Old 04-07-2007, 07:41 AM   #12
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My friend has a Scamp 16' Deluxe that has 13" Goodyears on it. We weighed each wheel and he within a 100# of the tire rating on one side and he wasn't loaded for a trip. We'll re-weigh when he loads the trailer this spring. Did I read here somewhere that tires should be derated for age? I wonder about the heat and other stresses that happen to a tire that is constantly running at its rated maximum. When these trailers were first produced they were simple and light weight. They seem to accumulate more options and deluxe packages over the years, yet retain the original tires. Are any members actual tire industry engineers?
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Old 04-07-2007, 08:42 AM   #13
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There are a number of tire-related threads here and on most other RV-related forums.

I found this link that Steve L. posted on another thread to the Rubber Manufacturer's Assn. RV Tire guide:

RV Tire Guide

Most of the problems associated with RV tires seem to be over loading for the rating, and under-inflation. The general consensus of sources I've read seems to be that RV tires probably ought to be replaced after about five years regardless of tread or sidewall visual condition.

Roger
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Old 04-07-2007, 08:59 AM   #14
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Thanks Roger,
I will down load and send the guide off to my friend. If the tires are running at or above their rating right off the factory floor, it doesn't leave room to add the basics of traveling.
Once again, Dave
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