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Old 09-12-2019, 12:44 PM   #1
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Tire Selection Help

Hello
I am worried about the tires on my 2000 Dutch Star 3851. My parents (previous owners) changed them back maybe 7-8 years ago. When I got it 3 years ago the tires passed inspection by 2 shops. They had some weather checking on sidewalls. I drove it for 2 years. It has sat in storage past year but I drive it once a month when the weather is decent. I have seen the damage from tire blow out and don't want to chance it. How old can these tires last?

On car tires I know there are 3 sizes (width/aspect ratio/diameter) what are the sizing on these tires. Are MH tires the same as semi tires or are there a different make up?

Where do you shop for tires with an emphasis on value?

Thanks
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Old 09-12-2019, 04:03 PM   #2
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7-8 years from your parents then another 2 from you. Safe to say you need new tires. Everyone has their opinion when it comes to age but I’d say anywhere from 5-7 years 7 pushing it pretty far. I run 295 75 22.5 on my DS. Bought mine from the local tire shop.
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Old 09-12-2019, 05:25 PM   #3
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Tire Prices

FMCA, and other associations, have a discount program for Michelin tires. There are lots of discussions on this thread about tires, brands, air pressure, maintenance, etc.

One thing to keep in mind when buying new tires is to make sure all 6 or 8 of them are the same age, and ideally not more than 6 months old when you buy them. Be sure to look at them before installation because you won't be able to see the inside tire on your rear drive axle once they are installed. All tires have a DOT stamp on them that indicates the year and the week (1 - 52) they were manufactured. See photo. The example shows that tire was manufactured in the 10th week of 2016.
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Old 09-12-2019, 10:43 PM   #4
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You really don't need to worry tire width/aspect ratio/diameter; just replace them with the same size that's on there now...assuming, of course, that the previous owners didn't change tire size. You can confirm the original tire size by going to the Newmar brochure archives on the company website and finding the brochure for your particular coach.

As for tire age, the rule of thumb is to replace them at no more than 7 years from the date indicated in the DOT code molded into the tire.

Join the Family Motor Coach Association and take advantage of its tire discount program. That's probably the best deal you'll find.

TJ
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Old 09-13-2019, 06:07 AM   #5
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Replace them with the same size as when it left the factory. I joined the FMCA after buying our Bay Star and checked their pricing. It's great if you want the tires that they have discount pricing for but I ended up purchasing Toyo M154 tires through a local shop that services tires. There are sooooo many threads on tires and there are several brands that seem to get consistently good reviews. It seems that for many, it's a decision whether to go with Michelin tires or save money by choosing something else.
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Old 09-13-2019, 07:27 AM   #6
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7-10 years of age seems to be the rule of thumb. Weather cracking is not good but sometimes not serious. Take a look at the chart attached. As others have said, be sure to check the date on the new tires to make sure they really are new. If they're a year old, you've lost at least 10% of tire life right out the door.
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Old 09-13-2019, 01:03 PM   #7
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I found the best price at Amazon.
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Old 09-13-2019, 01:37 PM   #8
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5-7 years from date of manufacture is accepted by most but not all.
By that standard your tires are well past due
The same tire and aspect ratio that is spec on the placard should be what your parents replaced the original with. I'd keep the same aspect ratio to fit the wheel well's without rubbing.
"truck" tires are what these are, Michelin makes a rv tire with less tread and softer sidewalls. Truck tires are designed to go over 100,000 miles easy (mine always did). MH tires will never see those miles.
Michelin does seem to have a problem with cracking tires seen in the photos above from their site I believe.
there are many makers that people seem to like that are much cheaper even with FMCA's discount figured in.
Michelin I believe says 5-6 years then annual inspection until a absolute max of 10 years.... the dealer I looked at 4 years ago said Michelin by "inspection" means dismount each tire and also look at the interior and remount . that means a little more cost than just "looking" at it
Your call... Personally I'm a fan of Toyo's .....45,000 miles in the last 5 years with almost no wear , no cracking ,rides great , outside on a full time rig with no wheel covers ( I move often).
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Old 09-13-2019, 11:34 PM   #9
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Thanks for all the info especially that chart which gives a good visual representation on what to look for.

I didn’t know they followed the same size formula as cars. Honestly never looked at the size on the sidewall.

I looked at the online Newmar brochure and no mention on tire sizes so I’ll look through the receipts and paperwork that came with MH or if not I’ll take a trip out to the storage lot to get the size.

Someone mentioned Amazon so I’ll start looking there first.
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Old 09-13-2019, 11:57 PM   #10
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I've looked on Amazon, but found mostly off-brand stuff in odd sizes. Personally, I'm not willing to put myself and others at risk just to save a few bucks.

If you can find known-brand tires in the appropriate size...and, with current date codes...fine. Otherwise, find a local dealer that participates in the FMCA discount program.

TJ
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Old 09-13-2019, 11:58 PM   #11
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I replaced the tires on my coach 18 months ago.

275/70 R 22.5
Freightliner chassis . Not positive if the the Spartan chassis used the same size.

Note : Newmar had a recall for undersized tires on the front axle ; so there may be different size on the rear of the coach .
A previous owner had upgraded all the tires; on my 99; to the same size when the fronts were replaced under the recall.

EDIT: As Jim , mentioned with a local dealer you can see the date code before you pay for the tires , sometimes those available online are older than what I'd care to spend money on .
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Old 09-14-2019, 10:15 AM   #12
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Amazon Sells Toyo Tires

Quote:
Originally Posted by Tranquil Jim View Post
I've looked on Amazon, but found mostly off-brand stuff in odd sizes. Personally, I'm not willing to put myself and others at risk just to save a few bucks.

If you can find known-brand tires in the appropriate size...and, with current date codes...fine. Otherwise, find a local dealer that participates in the FMCA discount program.

TJ
Amazon sells Toyo tires that fit my coach.
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Old 09-14-2019, 10:38 AM   #13
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Quote:
Originally Posted by USMC_1345 View Post
7-8 years from your parents then another 2 from you. Safe to say you need new tires. Everyone has their opinion when it comes to age but I’d say anywhere from 5-7 years 7 pushing it pretty far. I run 295 75 22.5 on my DS. Bought mine from the local tire shop.
Michelin tire guides say to have the tires professionally inspected starting at five years and absolutely replace at 10 years. I went 9 years on mine and they looked good enough for another 9.
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Old 09-14-2019, 11:12 AM   #14
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Quote:
Originally Posted by Toltec View Post
Amazon sells Toyo tires that fit my coach.
As I pointed out, "If you can find known-brand tires in the appropriate size...and with current date codes...fine." Apparently, you did.

The current date code thing is what would concern me. Somehow, I just can't picture rolling eight tires into the UPS store and saying "I need these returned to Amazon because the date codes are too old."

TJ
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