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Old 10-28-2020, 09:06 AM   #1
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Default Tire Question?

I have a 2014, 210UDS.
I recently replaced a Maxxis M8008,size 205/75R14 that had tread separation. The tires I had were all "C" rated tires. The replacement tire sent was a 6 ply "D" rated tire.
My question is: can C rated and D rated tires be mixed? The C rated tires would carry 50psi and the D rated would carry 65 psi. Should I carry only 50psi in the D rated?
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Old 10-28-2020, 01:08 PM   #2
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I found this Expert Reply on eTrailer and believe the take-away is to not mix on the same axle:
We do not recommend mixing tire types, sizes or load ranges but for example in the case of a spare tire that will be used for only a short distance (and at or below its speed rating of 65-mph) it is not an absolute disaster to have differently-rated tires on the trailer for a brief period. I do not recommend having different tires in use on the trailer on an ongoing basis.

Different load ranges will have different psi pressure requirements and will deliver different weight capacities. They may also have noticeably different ride characteristics depending on their age, tread wear and ambient temperature conditions and on the trailer load. If you had to mix tires it would be better to have them be the same on any given axle and have the axle with the higher-rated tires be the one bearing the greater portion of the trailer load.

Tread width can vary very slightly between brands of the same size tire or between radial and bias types of the same size but these differences will be subtle since they all have to meet the overall width specification
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Old 10-28-2020, 01:15 PM   #3
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Here is a second Expert Replay which points out the D range tires will be stiffer than C and I would conclude that is why they should not be mixed on the same axle.

A higher load range tire has a higher ply rating but it will also produce a rougher ride ... The key is that trailer tires should always be inflated to the maximum psi indicated on the tire. This is because of how they are constructed, with a thick sidewall, and if under inflated they can produce excessive heat and lead to failure.
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Old 11-01-2020, 03:31 PM   #4
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LEWR, according to Goodyear, trailer tires should be inflated according to their "load". The MAX pressure listed on the tire itself is the Max pressure for the Maximum load. Check here For the Goodyear Trailer tire inflation guide:
https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
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Old 11-02-2020, 08:21 AM   #5
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Quote:
Originally Posted by LEWR View Post
I have a 2014, 210UDS.
I recently replaced a Maxxis M8008,size 205/75R14 that had tread separation. The tires I had were all "C" rated tires. The replacement tire sent was a 6 ply "D" rated tire.
My question is: can C rated and D rated tires be mixed? The C rated tires would carry 50psi and the D rated would carry 65 psi. Should I carry only 50psi in the D rated?
If they are the original tires on your 2014 I would replace them all. I just replaced our 2015 tires as they were wore out tread wise. I would not feel comfortable traveling on 6 year old tires. If one is separating the others are not far behind in my experience. My tire shop replaced all 4 on our 2015 210uds for $500 Canadian. Cheap insurance to avoid a tire failure and risk damaging the trailer wheel openings and body or worse. Silverado
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Old 11-02-2020, 10:28 AM   #6
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Quote:
Originally Posted by mjpguy View Post
LEWR, according to Goodyear, trailer tires should be inflated according to their "load". The MAX pressure listed on the tire itself is the Max pressure for the Maximum load. Check here For the Goodyear Trailer tire inflation guide:
https://www.goodyearrvtires.com/pdfs/rv_inflation.pdf
I simply run my Goodyear Endurance tires at max pressure and don't give it another thought. Just keep it simple and don't complicate things.
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Old 11-11-2020, 07:58 AM   #7
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I just heard from Maxxis Tire Company's support. They said," Although not recommended it is okay to mix different load range tires on the same trailer". They also said to run the tires at the same pressure and not exceed the max psi on any tires. They also said if I went to all D rated tires to make sure the rims are rated for 65psi. I will run the 3 C rated tires as well as the 1 D rated tire at 50 psi. I plan to watch the temp. on the D tire.
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Old 11-14-2020, 08:05 AM   #8
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Have you looked at the DOT number on the 3 C load tires, the last 2 digits indicate the year of manufacturing. Example 4113 would mean it's a 7 year old tire. If so be careful trailer tires have known to separate because of being parked on sharp rocks and gravel for extended periods of time. My brother just last year had one tire separate 30 miles from home and replaced it with his spare. By the time he got to his destination 2 more started to bulge and separate. He ended up taking the other 3 tires off in the campground and hauling to a tire shop to replace while on vacation. Not much fun. Just be careful is all I am suggesting. All his tire where 90% tread left and looked good but were 8 years old.
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Old 11-15-2020, 08:53 AM   #9
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This is what you are looking for on a tire. Like mentioned in the previous post, the first 2 numbers are the week and last two are the year of production. Trailer tires looks can be deceiving. Age is the biggest cause of failure on tires. Most people do not wear them out on their rv, Unless they are stored inside I wouldn't trust used trailer tires over 7 years old. Silverado
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Old 11-15-2020, 04:02 PM   #10
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Thanks guys, what a great webb site. I will keep a record of the age of each tire and replace them at 5 years old. Hopefully not have problems.
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