petanqueur99
Chambly, Quebec
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I recently bought a 2004 Jayco Legacy 3710 RLTS. It has two original ST 235/80R16 tires on one axle and two replacement LT 235/85R16 tires on the other axle.
The reason for the 235/85 tires are that the TV, which I also bought, has original 235/85 tires.
When I need to replace the other two 235/80 tires, should I go with two other 235/85 tires or not? Or, maybe go with 245/75 tires.
TIA,
Petanqueur99, new 5th wheel and TV owner
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Hamops
Oshawa, ON, CA
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Your trailer's gross weight on the axles will be about 11800lbs. When you replace the tires, replace with ST235/85R-16" RADIAL Tires, Load Range 'E'. They are built to withstand 3000lbs of load per tire.
Cheers
Helen & George VE3INB and Max (Bichon Frise)
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petanqueur99
Chambly, Quebec
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Thanks for your reply, Hamops.
Please go back to my edited msg. The 235/85 tires have a larger circumference than the 235/80 tires. Could that create a problem, and what is the minimum distance between the two tires?
TIA,
Petanqueur99
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Hamops
Oshawa, ON, CA
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Now that you edited your post, I'll have to change what I told you. You should be replacing your tires with the same as the original ST235/80R-16" Radial Tire, L.R. 'E'. If they were originally on the trailer then you want to keep to that tire size. They have load capacity of 3500 lbs per tire, giving you a greater margin of safety.
The LT type shouldn't be used on the trailer because of they aren't as flexible or as resistant to ultra-violet sunlight. They will suffice for the time being but when they need to be replaced, use a ST type of tire.
By the way, the LT235/85R16/L.R. E's that are on your trailer are only rated for 3042 lbs at 80 PSI per tire. It might be advisable to replace them sooner than later.
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George H
Washington
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If you go with the ST tires, stay away from Chinese.
I run LT235/85R16 E tires on both my TV and 5er. Ageing tires from 5er (date code fanatic) get moved to rear of DRW before they get excess age. Hate the thought of tossing tires that may only have 12k miles.
George, Juanita and Mandie (boss Shar-Pei)
01 F350, PSD, DRW
05 Carri-Lite 32RS3
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donn0128
Pronounced Ore-gun
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Hate to disagree with you but ST(special trailer) tires are rated to a max of 62MPH and are basically JUNK. Go out and buy a set of LT235R16 tires and never look back. Most of the heavy fivers manufactured today are factory equipped with LT tires not the ST junkers. Simply do a search on the forums here for many many discussions on this subject.
Donn
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Hamops
Oshawa, ON, CA
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donn0128 wrote:Hate to disagree with you but ST(special trailer) tires are rated to a max of 62MPH and are basically JUNK. Go out and buy a set of LT235R16 tires and never look back. Most of the heavy fivers manufactured today are factory equipped with LT tires not the ST junkers. Simply do a search on the forums here for many many discussions on this subject.
In order to meet the trailer design parameters with LT tires, a complete set of LT265/75R16/E's would be required and even at that they would not quite meet design. These tires have a weight capacity of only 3415 lbs each at 80PSI. I agree that the LT tires have a higher speed rating but does one need to go faster than a 100 kliks (62MPH) pulling a trailer?
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donn0128
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Hamops wrote:donn0128 wrote:Hate to disagree with you but ST(special trailer) tires are rated to a max of 62MPH and are basically JUNK. Go out and buy a set of LT235R16 tires and never look back. Most of the heavy fivers manufactured today are factory equipped with LT tires not the ST junkers. Simply do a search on the forums here for many many discussions on this subject.
In order to meet the trailer design parameters with LT tires, a complete set of LT265/75R16/E's would be required and even at that they would not quite meet design. These tires have a weight capacity of only 3415 lbs each at 80PSI. I agree that the LT tires have a higher speed rating but does one need to go faster than a 100 kliks (62MPH) pulling a trailer?
With 6000# axles under his fiver this tire is more than sufficient to handle the load.
When the speed limits in the states in many states is 70, people will by nature pull at that speed.
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Butch50
NW Montana
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donn0128 wrote:Hate to disagree with you but ST(special trailer) tires are rated to a max of 62MPH and are basically JUNK. Go out and buy a set of LT235R16 tires and never look back. Most of the heavy fivers manufactured today are factory equipped with LT tires not the ST junkers. Simply do a search on the forums here for many many discussions on this subject.
I agree with you, go to the LT tires. You are running 6,000# axles and the LT235/85r/16 have all the capacity you need. If you think you want more capacity you can go to the "G rated LT235/85/R16 and have a capacity of 3750# per tire. Now you would most likely have to change rims also for the 110# PSI of the "G" rated tire.
Like donn said most of the heavier 5ers today come with LT tires on them. My last Excel had the LT235/85R/16 range "G" on them and my present one does also.
Butch
2006 F550 CC 4X4 Lariat PSD/Torqshift Dark Shadow Metalic Grey
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JIMNLIN
Big Cabin, OK
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donn0128 wrote:Hate to disagree with you but ST(special trailer) tires are rated to a max of 62MPH and are basically JUNK. Go out and buy a set of LT235R16 tires and never look back. Most of the heavy fivers manufactured today are factory equipped with LT tires not the ST junkers. Simply do a search on the forums here for many many discussions on this subject.
Great advise.
Do the search on ST tires on a heavy trailers and interstate speeds as suggested and you will see why many folks have gone to LT tires. LT are a upgrade option from some RV manufactures or come from the RV manufacture on higher end line of 5ers/large TT's/commercial trailers.
If a LT235/85-16 E meets the trailers weight capacity requirements then by all means replace the problematic ST tires with them. Four LT will give you 12380 lbs of capacity.
Many folks with a 5er as large as yours upgrade to the Goodyear G614 RST to get away from the ST tire. These tires are load range G at 110 psi and 3750 lbs capacity. Your present wheels may not be rated for 110 psi.
Another upgrade option that is becoming popular is upgrading to 17.5" wheels and commercial grade 17.5" LT tires to get away from ST tire problems.
Or stick with a ST and hope for the best.
"good judgment comes from experience, and a lot of that comes from bad judgment" Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach Linex
'97 Park Avanue 28' 5er with two slides 16" BFG Commercial LTs
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