What air pressure do most of you recommend?
I heard at the recent rally that one fellow runs his at around 90 lbs cold. Sounded good to me but my question is, is that for ALL tires including the tags?
I checked mine today after sitting all night and they were all 108 and the tags were 80 and 85. I say ALL but I had no way to check the inner drives. Some SOB installed them so I couldn't I guess, so it looks like they will have to come off soon so I can! Maybe that would be a good time to install a monitor like the one JC has. Sounded pretty nifty from what I overheard! Anyone know where to get this item at or from and how much they run?
Thanks...
Ace
Ace- If you want to know exactly what to run in your tires, weigh the bus by axle with it full like when you are going on a trip. Give me your tire make, model and size and I can look up what you should run. I have 11R-24.5 16 ply with 10,500lb front axle and 20,500lb rear axle. I run 90lb.
I have the wireless tire monitors that screw into the tire stem. They work, but am not real impressed. I inflated the tires to the same tire pressure by my hand gauge. When I installed the sensers, they all read different pressures (from 86 to 92). But the real purpose is to make sure they don't go down beyond 75%. Good Luck, TomC
For what it is worth, I agree with TomC. I would also suggest a side weight on each axle too. That way you will KNOW the actual weight carried by each tire & then TomC's air pressure info will be of maximum benefit.
Also, once you know the side - side loading, you will be able to compensate if necessary.
By the way, You don't need my bus parked near by to make yours look good! ... but do be careful what you ask for, you might endup wanting your own 4501 (ROTFLMAO) ;D ;D ;D ;D
Ace,
I took the max weight per the plaque in the front, and I also weighed mine. It only cost $8, and they gave it to me by axle. I did not get side to side, but that would be good to know how well I balanced it. I run Michelin 315/80 R22.5 Pilote XZA1 tires. I am so under loaded that it does not call for much pressure. I run them higher for better fuel mileage. I had to pay the shop to re-position my inner duals so I could add the long stem so I could check my air pressure regularly. Pretty irritating they didn't do that in the beginning when I bought the tires. I see the formatting did not come out very well. It looks good while I'm editing it, but after I post it, its pretty hard to read. Hopefullly you can make sense out of it.
H3-41 H3-40
per vehicle plaque Max vehicle load air pressure
Front 16,500 115 14,000
Duals 22,500 90 25,000
tag 14,000 100 10,000
49,000
52,500 GVW 42,500 GVW
Actual pressure as of
1/12/2006
actual Front 10,580 80 95
weight Duals 17,460 80 84
tag 10,520 80 95
38,560 lbs total coach weight for now, but I keep adding more things.
Some folks claim lower pressure rides smoother. I use to run 95 front 90 rear in my GMs, my MCIs heavier I've always run 105 in front 110 in rear. MCI has a 20K lb rear.
For what it's worth, I use the K.I.S.S. method for tire air pressure. On my MCI, I run with
100lbs all the way around. No wondering, no weighing, no problem. However they do
need to be checked before each trip. Good luck.
Ace,if I remember correctly Jack Conrad has a tire moniter system that he was happy with so you might ask him,and on another note I will park my bus next to your's anytime besides really enjoying your's and Susan's and bud company it really make's me want to get more done to mine,I did get one a/c and one fantastic vent installed yesterday,now to get it in primer before the weather turns bad
Ace- the Michelin inflation table starts at 85psi. With a single that would be 12,830lb per axle and dual would be 23,360lb per axle. I see no need for anything over 85psi, with 80psi being still alright. Good Luck, TomC