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Need trailer tire help
I have a B7500 Kubota which I trailer quite a bit on both pavement and dirt roads. My trailer is 14' by 7' rated for 4400 pounds. The tires are 5.30 by 12 Carlisle 6 ply. I have ruined 3 tires this summer in only about 500 miles. All have had the sidewalls bulge. Looks like broken cords to me. The trailer is not overloaded according to the tire ratings. I am looking for a heavier tire in the same size. The only one I can find on the net is made by Nanco. It comes in 4, 6, or 8 ply. I have never heard of Nanco. Does anyone have experience with these tires? Can anyone offer other tire manufacturer suggestions?
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Need trailer tire help
I'll stay away from brand discussions. I don't know much about tire brands anyway. A recommendation from me wouldn't be very credible anyway. I'm still running THE Firestone tire on my 1/2-ton but not from the production runs that were recalled.
Off the top of my head, I wonder if changing tractor position in the trailer might alter the tongue weight. Some balances may create larger load shocks on tires than other balances. I think my single axle 5' x 8' utility trailer tires are 15". I wonder if 12" tires would run hot and larger tires even in the same load range would work better. Others here know far more about this stuff than I do.
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Need trailer tire help
That is my thought too, Tom. Those little 12 inchers must be screaming at highway speeds. And I'd bet if you added up the weight of tractor and implements plus the trailer weight you are right at max. Do you have room for larger wheels ?
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Need trailer tire help
Is this a tandem or a single axle trailer?
I can't think you are getting 4400lbs capacity out of a single with 12" tires, yet we do not see many tandems with 12's on them. That makes me curious.
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Need trailer tire help
Does the trailer have springs or is it a frame on axle type of trailer. I have found from experience that trailers without springs if used on rough roads need to be de-rated about 50% if you want the tires to last. After all they are acting as springs and carrying the load too.
Ben in KY
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Need trailer tire help
I have the 12" 5.30 on my boat trailer that is rated up to 2500 lbs but in reality it has less than that. The maximum load rating I can find on a 12" 5.30 is 1045 lbs. Seem like you are overloading the tires. I would be worried about the huds and axle ratings. Some how I think someone is snowing you concerning the trailers load rating.
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Need trailer tire help
I guess I assumed the trailer has tandem axles. A 4,400 lbs. load on a single axle probably would be greater than my old '66 Econoline that had 13" tires.
On the Econoline I had two cord separations with 6-ply 45 lbs. max pressure tires. I never had a problem after I put on Goodyear 8-ply 60 lbs. tires. However, I didn't carry as heavy loads on the highway after I got the 8-ply tires. I think 13" 8-ply bias tires do run hot and may not be made any longer for that reason.
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Need trailer tire help
Hal, is your trailer a tandem? I would assume that it is for that much weight on that size tire. I think that depending on the road that speed could be a factor for there failure. Load placement could also be a cause of the problem.
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Need trailer tire help
Art: my trailer is a tandem. The tire ratings are 1045 pounds at 80 psi. I find the trailer very choppy unloaded at that tire pressure so usualy run 50-60 pounds. The trailer is very well built (these guys have been in the business for years) but the tires seem to be the weak spot. I never weighed the tractor with FEL and winch but guessed about 3000 pounds based on Kubota literature. Maybe I am way off and the load is heavier. I am not worried about hubs and spindles as they were oversized on my request. Axels are rated at 2500 lbs each. I could go to 13" wheels but want to keep the deck as low as possible not to mention I just made the investment in the trailer.
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Need trailer tire help
Hal: Conventional wisdom is that a tractor always weighs more than we think it does. I would check the load rating of the tires at 50-lbs. Seems like there's a good chance they'd be overloaded at that pressure.
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Gas Generator Weather Protecti
11-11-2002, 18:36 
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