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Old 01-12-2019, 05:00 PM   #11
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this would all mean something if the manufactures really knew what they were doing . they put tires on based on gvwr of the trailer less 10 to 15% since of course the TW carries some [so they say] leaving the owner with tires that are not suitable for the load from the get go . it's no wonder people go from the D rated to E rated right off the bat . My unit came with the d rated and they were not enough for my loaded TH . so up to e rated once i got it home . Going with a taller tires is fine as can be as long as you have the clearance . now show me the studies FR did on TT tires and loads .
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Old 01-12-2019, 05:00 PM   #12
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I did what I wanted. When putting on my G614s, I went to a 235-85-16. Everything has worked perfectly for almost three years, 23 trips, and close to 7000 miles.

I like the little added clearance. The only negative (if you want to call it that) is the 6 pt. leveling sometimes won't hit ground on one side if I'm on a bad slope. I made wooden blocks and I also have Snap Pads on the landing gear so that's rarely an issue anymore.

I'd do it if you want to. Not a big deal in my opinion.
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Old 01-12-2019, 07:34 PM   #13
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this would all mean something if the manufactures really knew what they were doing . they put tires on based on gvwr of the trailer less 10 to 15% since of course the TW carries some [so they say] leaving the owner with tires that are not suitable for the load from the get go. (NHTSA will recall tires in a flash if it's discovered minimum standards are not met.) it's no wonder people go from the D rated to E rated right off the bat . My unit came with the d rated and they were not enough for my loaded TH . so up to e rated once i got it home . Going with a taller tires is fine as can be as long as you have the clearance . now show me the studies FR did on TT tires and loads .(The tire manufacturer is responsible for tire testing to standards. The vehicle manufacturer is responsible for appropriate fitmants.) Some kind of uncle requires the vehicle manufacturer to certify their tire fitments.

Going up a load range with the same designated tire size does not change the physical size of the tire. It just adds more available load capacity via the ability to add more PSI.


All tires are fitted to, at the very minimum, support a vehicle's GAWRs. Automotive fitments will provide a percentage of load capacity reserves. That is not a requirement for RV trailer tire fitments.


Vehicle manufacturers set specifications for their needs. Tire manufacturers build to those needs.
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Old 01-12-2019, 09:31 PM   #14
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Going up a load range with the same designated tire size does not change the physical size of the tire. It just adds more available load capacity via the ability to add more PSI.


All tires are fitted to, at the very minimum, support a vehicle's GAWRs. Automotive fitments will provide a percentage of load capacity reserves. That is not a requirement for RV trailer tire fitments.




Vehicle manufacturers set specifications for their needs. Tire manufacturers build to those needs.
If the tires are fitted to the minimum of the GAWR then the tires that came with my camper were off a 1000 lbs , fully loaded it would not carry the weight per the tire manufacture . what Vehicle manufactures do and what rv manufactures do are to different things . Sometimes i think they just grab whats on the shelf , though i'm sure they base their tire picks on the trailer max weights and they miss the mark all the time . no wonder so many have to up grade load ratings on new Trailers usually after a few blow outs . the facts are in all the threads posted about just this . now the OP was talking about going up in tire DIA which is fine if he has the clearance . FR may post a tire size on their trailers based on bear minimum load ratings . It's not effecting operation nor would it effect warranty If one was to go to a higher load rated tire or a larger DIA tire .
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Old 01-13-2019, 12:06 AM   #15
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The only problem I see is clearance as stated above and with the taller side wall you will have more side to side movement. That's wjy all sports cars have very short tires even if they have 22" wheels. Most semis have a shorter side wall and bigger wheels
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Old 01-13-2019, 12:25 AM   #16
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I have the clearance so went with the 235/85/16. My wheels are rated for 110 PSI so I went with the tire with the best proven reputation, Sailun. The 320# per tire, difference is 4400 vs 4080. If my wheels were only rated 80 PSI I'd have gone with the Sailun 235/80/16 and ran them at 80 psi as approved by Sailun is OK.
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