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Old 05-19-2019, 04:31 PM   #1
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10 ply vs 8 ply tires

Our travel trailer is almost due for tires looking at the tread left before hitting the wear bars. Trailer came with 8 ply tires but thinking about replacing with 10 ply tires (Maxxis 8008). Have already verified the rims are rated for the 10 ply tires. Also understand that the load capacity of 10 ply tires likely exceeds the axle ratings and we have no intention of exceeding the axle load ratings. Other than a little stiffer ride, are there any other downsides of switching to 10 ply vs 8 ply tires?

Thank you in advance for your kind responses.
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Old 05-19-2019, 06:56 PM   #2
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If you have 16" rims that are rated for 110psi, I'd go to simple tire and order the Sailun S637. I haven't noticed any ride difference and run mine at 80psi cold. If you have 15" rims, I'd be tempted to run a high end LT E rated tire. I had a hard time finding a good 15" trailer tire years ago.
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Old 05-19-2019, 08:48 PM   #3
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If you have 16" rims that are rated for 110psi, I'd go to simple tire and order the Sailun S637. I haven't noticed any ride difference and run mine at 80psi cold. If you have 15" rims, I'd be tempted to run a high end LT E rated tire. I had a hard time finding a good 15" trailer tire years ago.
Thanks for the response. My apologies on not stating my tire size. Our trailer has 15 inch rims ... tires are 225/75/15 ... very common size. Our trailer is also a low rider ... the wheels actually tuck up under the wheel wells ... so no going up in rim or tire sizes without blocks between the frame and the axles. Trailer pushes 8,700 lbs loaded with water and gear. I run about 1400 lbs on the hitch ... leaving 7,300 lbs / 4 = 1,825 lbs per tire when not moving (static loading). When moving (dynamic loading) ... who knows what the weight is on the one tire when you hit a big dip or pothole in the road. Then there is the overloading on that one tire when the other tire blows out on the highway until you can get pulled over and put the spare on. I just feel better having more tire rating (ply) if available.
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Old 05-20-2019, 09:46 AM   #4
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Go with a set of Maxxis E rated tires. Goodyear is now also making a nice E rated trailer tire.
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Old 05-20-2019, 01:24 PM   #5
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Quote:
Originally Posted by UtahEngineer View Post
Our travel trailer is almost due for tires looking at the tread left before hitting the wear bars. Trailer came with 8 ply tires but thinking about replacing with 10 ply tires (Maxxis 8008). Have already verified the rims are rated for the 10 ply tires. Also understand that the load capacity of 10 ply tires likely exceeds the axle ratings and we have no intention of exceeding the axle load ratings. Other than a little stiffer ride, are there any other downsides of switching to 10 ply vs 8 ply tires?

Thank you in advance for your kind responses.
Normally we all want tires with some extra reserve capacity. The extra tire load capacity has nothing to do with overloading an axle. Exceeding the axles capacity with weight is the only way to overload them. Bottom line, get the LRE tires and use the load capacity reserves provide by increased tire inflation pressures.

Valve stems can be an inflation problem, make sure yours are rated tor 80 PSI+.
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Old 05-24-2019, 05:04 AM   #6
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Originally Posted by UtahEngineer View Post
Our travel trailer is almost due for tires looking at the tread left before hitting the wear bars. Trailer came with 8 ply tires but thinking about replacing with 10 ply tires (Maxxis 8008). Have already verified the rims are rated for the 10 ply tires. Also understand that the load capacity of 10 ply tires likely exceeds the axle ratings and we have no intention of exceeding the axle load ratings. Other than a little stiffer ride, are there any other downsides of switching to 10 ply vs 8 ply tires?

Thank you in advance for your kind responses.
Awesome that you thought of checking your rims for load and pressure ratings, most mechanics don't even do that! I definitely would go for load range E tires. The price difference from 8 to 10 ply is minimal, usually 10-15% tops. Most trailers using that size are often at the limits, sometimes overloaded. In fact, I just replaced 2 this week for one of my customers. He had 2 blowouts and was replacing on an "as needed" basis. I showed him what to look for and he brought the remaining 2 wheel assemblies this week.

Our previous trailer had the same size and load range issues, "E" tires felt more stable and we ran them at 75 psi for the most part.

We used Goodyear Marathons as we had BAD experiences using some off-brand Chinese tires (all GY were back ordered that year). The 3 year old GY Marathons on the 5er are China made, so far OK but we'll see. Maxxis isn't popular here yet, read good and not so good on them. Sailun is a brand I sell for automotive, it is my low-line tire for budget-limited customers. No real issues on qualitu but they can be noisy (on cars), don't last that long and once in awhile have pulling issues (on cars). I'd step up to a better brand.
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Old 05-24-2019, 11:31 AM   #7
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Could not happier with our Michelin defenders our 30 ft Airstream. Went up to 235-75-15. 50PSI tire. Smooth ride. Over 15k miles. Still look new.
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Old 05-26-2019, 01:25 PM   #8
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I switched out the Trailer Kings our RV came with and upgraded to the Endurance E-load 10 ply. Everything has been great with them after 2 years and 15K miles.
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Old 05-27-2019, 08:46 AM   #9
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I switched out the Trailer Kings our RV came with and upgraded to the Endurance E-load 10 ply. Everything has been great with them after 2 years and 15K miles.
Yep, +1 on the 10 ply Goodyear Endurance tires. Just installed all 4 on our trailer along with the spare.
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Old 05-27-2019, 09:07 AM   #10
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For me, I would want a better than 65mph speed rating. To me, the speed rating tell me how well the tire is manufactured. I am thinking I will go the Goodyear Enduance when the time comes.

I know when I had a 5th wheel and put the expensive Michelin XPS ribs on it after s China bomb blew out I felt a lot better towing as tires dropped way down on my 'worry list'.
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