Proper front tire pressure - Printable Version

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+--- Thread: Proper front tire pressure (/showthread.php?tid=1417)

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Proper front tire pressure - folivier - 04-11-2014

Thought I'd start a new thread so the other one doesn't get too cluttered.
I've been running 130 psi on the front tires which are Michelin 315s. According to their inflation charts that gives me a maximum weight capacity of 9090/tire or 18180# for the front axle. My actual weight is 16540#.
So should I still be running 130psi or should I reduce the fronts to 120psi which would still give me 17060# on the front?
And on the drive axle I'm running BF Goodrich at 105psi which gives me 13220 single axle and 24020 dual tire axles.
Should I reduce the pressures on these also?

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RE: Proper front tire pressure - Chester Stone - 04-11-2014

Forest, in my view and I think that Newell will confirm, run the front 315s at allowed maximum and keep your speed down.

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RE: Proper front tire pressure - folivier - 04-11-2014

That is Newells recommendation Chester, I asked when we first bought the coach. Just was wondering since I have accurate weights now.
On speed I've driven 60 since we left Louisiana and will get to Tom's today. Nice, relaxing drive. Only had to pass 3 people on I-10 in almost 1500 miles. And my mileage has been averaging 7.3 on Pro Driver and 8.5 on VMSPC.

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RE: Proper front tire pressure - qcj - 04-11-2014

Forest, My weight is about the same as yours and I run my 315s at about 125 or 126 and drive 60 to 62 mph. The ride seems to be a bit better and from my pressure pro said they go up to about 137 to 142 in hot weather. I don't plan to run these tires more than about 3 years and maybe then go to 365s. I don't understand why Newell did not put 365s on when they built the coach.

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RE: Proper front tire pressure - ashley - 04-11-2014

Money, Just kidding but the 315 will run cooler with 130 than less pressure

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RE: Proper front tire pressure - lbrachfe - 04-11-2014

Will run softer at 120

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RE: Proper front tire pressure - ashley - 04-11-2014

Will run even more softer at 90

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RE: Proper front tire pressure - rheavn - 04-11-2014

Incoming...........................

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RE: Proper front tire pressure - Fulltiming - 04-11-2014

I would not cut it too close in that it is doubtful that both sides of the coach weigh the same. I have had the individual wheel positions weighed multiple times on my coach and depending on the way I loaded the coach and how much 'stuff' I had in the coach, the front right to left balance has been as close as 90 pounds (driver steer heavier) and as far apart as 660 pounds (passenger steer heavier). The drive axle has varied even more, up to 3,320 pounds difference between right and left side although the left side of the drive axle is always heavier by at least 560 pounds and typically about 1,200 pounds.

According to the tire companies, inflation pressure for each axle should be same on each side and based on the weight of the heavier side.

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RE: Proper front tire pressure - Yachts - 04-11-2014

For what it's worth, 701 has 365's and there is a world of difference in the ride.. 507 and 512 had 315's .. If someone is gonna keep a coach I will reccommend the difference in ride

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