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Old 08-31-2018, 05:46 PM   #1
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5er Tire Issue

Have a 2018 Cedar Creek 29 ik, measured weight 12,000 pounds. Came with Constancy tires, load range E, and has 6,000 axles. No issues, but after 8,000 miles this year decided to upgrade the tires. Wheels are 16 6.

Want to buy Sailun 235/80 16 load range g tires. Need to upgrade the wheels to handle the 110 psi tires.

I can't find a Sailun load range chart anywhere. Dealer is saying run 85 psi, I'm thinking 105. Both are guesses. I know I'll be a little rough inside with the increased pressure, but want plenty of capacity/safety.

Anyone seen a Sailun capacity chart, what would you recommend?
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Old 08-31-2018, 08:09 PM   #2
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If you are going to run a G rated tire l would at least go down to 90 lbs. The side wall will have less give then an E rated and beat up your 5r . Check other manufactures G load rating Saliun should be real close.
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Old 08-31-2018, 08:46 PM   #3
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I run my Sailun 235/80 16 load range g tires at 100 psi and even then the TPMS shows 115 to 120 psi running down the road.
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Old 08-31-2018, 08:58 PM   #4
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I run my Sailun 235/80 16 load range g tires at 100 psi and even then the TPMS shows 115 to 120 psi running down the road.
What does your fiver weigh?
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Old 08-31-2018, 09:11 PM   #5
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What does your fiver weigh?

Last weigh in was 14360 lbs on FW axles. The Saliun tires are rated for 4050 lbs each at 110 PSI.
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Old 08-31-2018, 09:22 PM   #6
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Last weigh in was 14360 lbs on FW axles. The Saliun tires are rated for 4050 lbs each at 110 PSI.
So with me at 12,000 plus 90-95 makes sense.
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Old 09-01-2018, 12:28 AM   #7
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Iíve a 16.5K GVWR 5er with 235/85R Sailuns and Iíve chatted with a Sailun rep about proper tire pressure and he advised me to keep them at 70 psi for the actual tire load on my rig (12,300 trailer axle wt). My factory wheels are rated 3750 lbs and factory rep said theyíll handle 110, but thatís way to much harsh ride and prone to skidding more easily. A tire should only be inflated for the max load it will carry (figure in full fresh water) not max load capacity psi. Sure, less road resistance, easier towing, but your smaller footprint will hinder braking performance and a harsher ride. I keep mine at 85 psi cold.

I compute proper tire psi by actual wt/max load wt x max psi. Example: 12300/4= 3075, 3075/4400= .698 x 110 = 76.8 or 77 psi. My fresh water = 75 gal or 623 lbs. Now itís 12923/4=3230/4400=.734x110=80.7 or 81 psi. Some add 10% for safety margin. So always make the psi formula a fraction of your tireís rated capacity as youíll never put that load on it. Youíll max the axle long before you max the tire. Smaller margin with E load.
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Old 09-01-2018, 12:46 AM   #8
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I don't understand the point of going to G rated tires and 110 psi when you're not really carrying any weight and you haven't had any issues with the tires you have.

You've got maybe 2000 on the pin and 10,000 on 4 tires or 2500 per tire. 110 psi is going to be like riding on solid rubber tires and your trailer will take a beating.

If you're worried about the cheap Chinese tires then get yourself some LT truck tires, which will easily handle the weight of your 5er and you won't have to run a ton of air in them. Your trailer will thank you.
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Old 09-01-2018, 05:00 AM   #9
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I run Sailun H rated tires on Carriage Cameo mounted on 17.5 rims. The dry weight is little over 12K. I never run near the max weight (crap I bring along) but always inflate my tires to 120psi (cold) when hitting the road, with tire monitor. Trailer pulls very nice,
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Old 09-01-2018, 08:35 AM   #10
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I run Sailun H rated tires on Carriage Cameo mounted on 17.5 rims. The dry weight is little over 12K. I never run near the max weight (crap I bring along) but always inflate my tires to 120psi (cold) when hitting the road, with tire monitor. Trailer pulls very nice,

Just curious how high does your PSI rise when running down the road on your tire monitor?
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Old 09-01-2018, 09:07 AM   #11
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I also don't understand the fascination with excessive tire weight rating. If you are at the limit then stepping up to the next load range is appropriate but arbitrarily going up weight steps isn't financially or ride appropriate. More isn't always better. There are plenty of options to chinese tire crap. Goodyear makes the Endurance ST tire and I have it on 2 trailers and happy with it. So far very good reports and that's often the tire upgrade some manufacturers are offering. Putting a LR G or H tire on a trailer that has weights appropriate for an E will ride rough and that in the long run damages things. Lowering pressure on an ST tire isn't a good idea since it causes sidewall flex and heating with is bad for tires, especially ST. But a free country and a person is free to install any tires they wish. Just a lot of misinformation and misconceptions out there.
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Old 09-01-2018, 10:48 AM   #12
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I also don't understand the fascination with excessive tire weight rating. If you are at the limit then stepping up to the next load range is appropriate but arbitrarily going up weight steps isn't financially or ride appropriate. More isn't always better. There are plenty of options to chinese tire crap. Goodyear makes the Endurance ST tire and I have it on 2 trailers and happy with it. So far very good reports and that's often the tire upgrade some manufacturers are offering. Putting a LR G or H tire on a trailer that has weights appropriate for an E will ride rough and that in the long run damages things. Lowering pressure on an ST tire isn't a good idea since it causes sidewall flex and heating with is bad for tires, especially ST. But a free country and a person is free to install any tires they wish. Just a lot of misinformation and misconceptions out there.

Even with my overrated G tires, I still had 2 blowouts last year on the FW. I don't ride in our camper, but everything seems to ride good except when a tire blows and things get rearranged. Sailuns are only about $140/ea so not too expensive.
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Old 09-01-2018, 07:45 PM   #13
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Even with my overrated G tires, I still had 2 blowouts last year on the FW. I don't ride in our camper, but everything seems to ride good except when a tire blows and things get rearranged. Sailuns are only about $140/ea so not too expensive.
Doesn't that show moving to a way overrated load capacity tire is not a cure for blowouts?

Your statement is a counter argument for going to a higher rated tire and shows that rating does not matter as much proper maintenance of the tirespressure
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Old 09-01-2018, 08:07 PM   #14
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Doesn't that show moving to a way overrated load capacity tire is not a cure for blowouts?

Your statement is a counter argument for going to a higher rated tire and shows that rating does not matter as much proper maintenance of the tirespressure

Not really considering our previous FW owner had a blowout with his E rated tires. There are two types of RV owners, those that had blowouts and those that will. Deal with it and move on.
I almost never exceed 60 MPH and inspect my tires at each stop and check tire pressure at least monthly or prior to any 100 mile plus trip. Of the failed tires, one G tire was 8 months old and the other was 3 years old and were on different axles opposite sides of the FW. S*** happens!
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