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Old 09-04-2013, 04:45 PM   #1
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Berkshire Tire Upgrade Question

Hello,

I have a 2009 Berkshire 390TS motorhome and I need to install new tires as the original tires (XRV 255/80R/22.5) are checked from age. I am looking at upgrading the tires to the larger Michelin 275/80R/22.5 XZA3+ or XZE2.
My question is, has anybody installed these larger size tires on this type of motorhome and is there any problem with them fitting. Also which would be better the XZA3's or XZE2's.

Thanks for any help with this decision....Donn
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Old 09-05-2013, 09:20 AM   #2
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Four years old and checked so badly they need replacing? Talk to Michelin about warranty - I think they will guarantee up to five years.

I've heard of others who went to a larger size but I believe the 275/70 is the replacement. A 275/80 is a larger diameter tire and requires more wheel well space, more dual spacing, and ill also throw your speedometer off cause it makes fewer revolutions per mile.
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Old 09-05-2013, 01:18 PM   #3
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I contacted Michelin and they said they do not warranty the sidewall cracking. Sad
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Old 09-05-2013, 01:29 PM   #4
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Don,
Sounds like 5 year old tires left in sun full time? If so, chalk that up to experience and protect the new ones (you will be motivated once you swipe your card). If you kept these tires covered, challenge michelin.

BTW, why are you looking to change size, what is your objective?
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Old 09-05-2013, 02:58 PM   #5
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The motor home was left in the sun at the dealer lot for two years. I've kept them covered since I owned them. When I bought the motorhome the checking hadn't shown up yet. Michelin won't warranty them so I contacted the dealer and they won't warranty them so, I'm out of luck.

I'm looking at changing the size of tires to increase my weight margin a little bit. I believe the increased tire size was an option on the Berkshire when new if you wanted a higher weight rating. I've also heared that other Berkshire 390 owners have run them with no problems. I would like to confirm this.
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Old 09-05-2013, 03:55 PM   #6
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Quote:
Originally Posted by DonnandMarg View Post
Hello,

I have a 2009 Berkshire 390TS motorhome and I need to install new tires as the original tires (XRV 255/80R/22.5) are checked from age. I am looking at upgrading the tires to the larger Michelin 275/80R/22.5 XZA3+ or XZE2.
My question is, has anybody installed these larger size tires on this type of motorhome and is there any problem with them fitting. Also which would be better the XZA3's or XZE2's.

Thanks for any help with this decision....Donn
Are you sure that larger tires will not decrease your turning undercut? I would check with the chassis maker. Just a thought. Good luck with your decision....
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Old 09-05-2013, 10:47 PM   #7
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X2 with the speedometer issue noted by Gary RV Roamer.

A friend of mine experienced the problem with a new Tiffin that upsized the tires but didn't calibrate the speedometer and Freightliner computer. There was a min +3 mph difference between actual and speedometer.
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Old 09-07-2013, 12:29 PM   #8
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Should I decide to go with the larger tires, I got a quote from the local Freightliner dealer to re-calibrate my speedometer for a cost of $124.00. They said it was no problem and would take them about an hour. They said that any Cummins dealer could do it also. Not bad
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