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Old 09-15-2019, 03:48 PM   #1
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Front tires

We are coming up on 5 year ownership of our DS, would like to replace our front tires with 315/80R22.5. Our old tires 305/70R22.5 will be 5 years old and
need replacing, has anyone done this and did you have any problems?

2015 Dutch Starr 4018

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Old 09-15-2019, 04:56 PM   #2
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Make sure your rim width is wide enough to handle a 315 tire From the Mich chart a 305 takes a 9” or 8.25” rim width. The 315 takes a 9” or 9.75” rime. If you have a 9” rim you are ok. So check your rim width it is printed on the rim

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Old 09-15-2019, 11:35 PM   #3
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Continental 315/80R22.5 will mount on a 8.50" rim unlike the Michelins wich as mentioned require atleast a 9 inch rim width
2015 Tuscany 40 KQ
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Old 09-16-2019, 05:37 AM   #4
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Originally Posted by garybtt View Post
We are coming up on 5 year ownership of our DS, would like to replace our front tires with 315/80R22.5. Our old tires 305/70R22.5 will be 5 years old and
need replacing, has anyone done this and did you have any problems?
Do they actually need replacing? Thats my question - those tires should normally go well over 100,000 miles without issue. I have had to replace a tire because of alignment issues - but never for miles driven. I replace my 10 year old Dutch Stars tires at 10 years. People kept saying no more than 5 years - but I have a cavaet - how and where do you store your coach and your tires when not driving? I think 10 years is not bad - if you check your tires and park and store the coach properly. Do you know parking the tires on rubber matts - basically stops the tires from deterioating rapidly? Keeping them covered from direct sunlight. Actually driving on tires is much better than sitting as well.

Maybe my points are off base to you- but if you have good treads on the coach - then I wouldn't be waisting $3,000 or more on new tires at this point.
Mickey on the Road since 1995
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Old 09-16-2019, 06:16 PM   #5
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I know your pain replaced my front tire with Toyo's. Replacing the rest later this year.
2015 Canyon Star 3424
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Old 09-16-2019, 06:36 PM   #6
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Michelin RV tire brochure give height of the 315/80 as 42.3" compared to the 305/70's 39.1" .
Brochure is to big to download to the forums , but available from the web site.
The additional height can lead to clearance issues on the coach body , and cause the anti-lock brake system to have fits.
Tire height on front and rear axles has to match ( or somehow be programmed in ) for anti-lock to perform properly.
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Old 09-16-2019, 10:19 PM   #7
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Michelin says that after 6 years you should have the tires routinely checked by a "tire professional." And at 10 years, no matter what, replace them.

Woody & Sandy
2003 Chinook Cascade
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