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Old 11-29-2011, 07:42 AM   #11
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Quote:
Originally Posted by tinlizzie23 View Post
We have a new-to-us 2004 Designer 29 RLTS 5er, and am curious as to what tire pressure most folks run in "normal" summertime travel. Still have the marathons, which appear to be in good shape (no cracks and plenty of tread), and sidewalls say 65psi max. Weight of 5er is around 10,000lbs.

On my several previous TTs, I generally ran 85-90% of max, and had no problems. Just wondered if 5ers were any different, since this is our first one.

Thanks
Allways run at Max pressure. Never under. And check your spare tire as well run the spare at Max. Never know when you will be needed it.
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Old 11-29-2011, 09:20 AM   #12
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I agree with max rated pressure stamped on tires. Sidewall flex is what leads to overheating and blowouts which is the result of underinflated tires.

Also note that if the tires were replaced by a previous owner you should be checking the current tire ratings not just taking for granted that the vin sticker has the proper inflation ratings for the tires on your the trailer. If the tires were upgraded in any way to a higher rating, i.e. E rated then the pressure needs to be at 80 PSI for those tires for max inflation. Not saying that is your case just putting it out there as a what if.
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Old 11-29-2011, 09:42 AM   #13
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Originally Posted by tinlizzie23 View Post
snip......... Am considering getting new ones next spring before the camping season, so would like some recommendations as to brand, based on experience. .......snip
I've been running Maxxis tires on my last two TT's and have been happy with their performance/reliability. My present set of Maxxis are 7 years old so it's time to replace them, and I plan to purchase a new set of Maxxis tires next spring as well. Staying with the same size tire, just increasing the weight rating (added plys).

http://www.maxxis.com/Industrial/Tra...ST-Radial.aspx

Bob
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Old 11-29-2011, 09:45 AM   #14
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Since you said you are going to get new tires in the spring (Good for you) have the dealer show you how to read the date codes if you do not know how.. If he wont show you FIND A DIFFERENT DEALER. Make sure the tires he puts on your rig are no more than 6 months old as the 5-6 year life of tires if from date of manufacture not first use..
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Old 11-29-2011, 11:45 AM   #15
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If you're gonna run the max pressure for the tires be sure that your rims can handle that pressure. They also have a pressure rating. It should be stamped somewhere on the rim. For example, if your trailer came with C rated tires the rims are probably rated for 50 psi which is also usually the max tire pressure for C rated tires. If someone put D or E range tires on it, the tires will probably be rated for 65 psi or more but the rims are still only 50 psi rated. So don't just blindly inflate to max pressure for the tire...check both first.
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Old 11-29-2011, 06:21 PM   #16
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From the pressure you noted, you have "D" rated tires. If it were me, I would put the same size in a "E" rated tire in a ST or LT . Buy the best tire you can afford and replace the spare to if they are 7 years old. The E rated tire has 80psi.
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Old 11-29-2011, 07:11 PM   #17
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snip....... For example, if your trailer came with C rated tires the rims are probably rated for 50 psi which is also usually the max tire pressure for C rated tires. ....snip
Bigfoot,

Your correct, one's wheel PSI rating is important when considering upgrading tires.

My '05' Eagle OEM steel wheels are rated for 75psi maximum (sticker inside the rim) and came with "C" range (50psi) Maxxis tires. As noted in my earlier post I plan to upgrade to a "D" range Maxxis (65psi) tire in the same size, which my existing wheel can handle.

I also plan to toss the plastic valve stems for metal ones as well, because in some wheel/tire applications a plastic valve stem can be the weak link.

Bob

ps: If anyone is considering upgrading tires, don't assume that your Jayco OEM steel wheel is rated at 75 PSI.., suppliers change and so do product specifications from one model year to another. Confirm your PSI rating.
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Old 11-29-2011, 09:29 PM   #18
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... If anyone is considering upgrading tires, don't assume that your Jayco OEM steel wheel is rated at 75 PSI.., suppliers change and so do product specifications from one model year to another. Confirm your PSI rating.
Absolutely...my Jayflight came with 50 psi rated rims (that matched the C rated OEM tires). The previous owner had replaced the tires with the next size up, E rated tires on those rims (even tho the rims were 5" and the tires were spec'ed for 6" min rims...something else to consider when upping the tire size). The E tires were rated 80 psi max but running 80 psi would have been more than 50% over the rim rating...not a good idea.
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Old 11-30-2011, 08:38 PM   #19
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Checked marathon tire date code, and its 0704, which should translate to manufacture in February 2004. So I will take y'alls advice and replace them before going out next spring. Would like to hear some opinions as to experiences with various brands, good or bad, and any recommendations you may have.

Thanks so much !
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Old 11-30-2011, 08:54 PM   #20
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snip.....Would like to hear some opinions as to experiences with various brands, good or bad, and any recommendations you may have. Thanks so much !
These Jayco forum threads may be helpful:

https://www.jaycoowners.com/showthrea...s+tires&page=3

https://www.jaycoowners.com/showthrea...t=maxxis+tires

https://www.jaycoowners.com/showthrea...t=maxxis+tires

Bob
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