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Old 09-20-2016, 05:26 PM   #1
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Tire pressure

Just got our 2017 Forester MBS 2401R. I've seen other posts about tire pressure, but no definitive answer. The tags on the door frame say 61lbs, the tires have 80 lbs on them. Which one is it? We have taken 1 short trip so far and weighed in about 50 lbs overweight. Anything we should be worried about?
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Old 09-20-2016, 05:48 PM   #2
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Originally Posted by Skialberts View Post
Just got our 2017 Forester MBS 2401R. I've seen other posts about tire pressure, but no definitive answer.
Since there are differing opinions, you won't find a definitive answer.

Lower tire pressures worry some drivers as they're more likely to be driving on under-inflated tires and their fuel mileage may be lower.

Higher tire pressures worry other drivers because the tires may wear prematurely and the ride may be harsher.

All in all, you can run them at 61 psi, at 80 psi, or anywhere in between (I run at 70...). Just don't venture outside of the 61-80 range and you'll be fine.

Dave
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Old 09-20-2016, 07:03 PM   #3
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I have 2016 Forester MBS 2401R. I put 65 psi in all tires and work great with tire safeguard system that factory set at 65 psi cold setting. Also Les Schwab seems to know that was air pressure to set at too. Yes the sticker at the door said 61 psi. I bought tires monitoring system because I was so concerned. So far after 5 trips 65 seems the set point for my 2401R.
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Old 09-20-2016, 09:07 PM   #4
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80 psi is the max cold inflation pressure for the tire. It is not a recommened press. It means you won't exceed the design limits if inflated to that number.
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Old 09-20-2016, 09:14 PM   #5
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Was at my sprinter dealer last week. Mechanic urged me to keep at least 70# in tires.
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Old 09-20-2016, 09:22 PM   #6
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Tire safeguard system set at 57 psi low and 85 psi high. At 60 mile/hour tires pressure went up to between 79 and 80 psi in hot day. I think if they are good in 57 and 85 but considered when they hot and moving.
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Old 09-20-2016, 09:41 PM   #7
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With a motorhome unlike a travel trailer the tire pressure should be varied depending on the weight of the vehicle. 80 psi is the max pressure for the tire to carry max load. there should be a loading chart that gives the tire pressure depending on Gross weight on each axle.
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Old 09-21-2016, 09:05 AM   #8
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It would not be unusual for tires to exceed 80 PSI if they were could inflated to near that number. Filling to 80 when cold and the expected rise in pressure when operating is all taken into account in design limits.
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Old 09-21-2016, 04:09 PM   #9
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The RV manufacturer and tire manufacturer work out the inflation requirement based on the tire and the vehicle weight, and that is posted on the door panel. There should never be so much or really any controversy about this. Follow the RV's GVWR of course and if following that then follow the tire inflation posted on the door panel. "Max pressure" stamped on the tire is just that, a maximum, never a guide. All pressures are to cold inflation. Don't change them during the day after driving; the pressures will naturally be higher then.


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Old 09-21-2016, 09:37 PM   #10
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Thanks everyone for their input. We will be taking our first extended (3 week) trip in November from Jersey to Florida. We will probably be at max load, so will keep an eye on the pressure.
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