Re: Tire Pressures Reply #25 – August 07, 2006, 01:13:29 am Yahoo Message Number: 69826Quote For our 87 LD, the LD Manual states that the non-Michelin pressures should be Single 55 PSI, duals 40 PSI, while the rating on the tires indicates 65 PSI. This appears to be quite a difference. Our weight certificate is well in line, well below the minimums for both front & rear axles and gross. Can anyone shed some light on this? The value on the tire side wall is the MAXIMUM pressure rating for the tire. You should ever inflate the tire to more than this value (when the tire is cold. You should determine the correct pressure for your tires based on the measured weight of your coach, corner by corner. The proper inflation for each axle is based on doubling the weight of the heaviest side of a given axle and then using that value to determine the pressure for all tires on that axle. All the tires on a given axle should be inflated to within about 1 lb. of the same value. Dual tires in the same position should be at least this close if not closer. For a better explanation see the RV tire guide at the Michelin site at http://www.michelinrvtires.com/michelinrvtires/hom_us.jsp . Inflation charts can be found on the Michelin site also but they are sometimes hard to find. The inflation charts for the steel side wall tires are at http://www.michelinrvtires.com/michelinrvtires/productguide/newprod/Tireloadpressure.jsp?tread=XPS+RIB . The pressures given in this chart are said to be for only the XPS tires but I have read that since 2005(? or so ?) the US gov. has mandated that all inflation charts for a given tire size and load rating be the same (to reduce confusion). So, I believe that the values given here will be pretty much the same as you will find for any tire. You typically can come up with an inflation chart if you poke around most truck or light truck tire manufacturer sites.Linley
Tire Pressures Reply #26 – May 28, 2008, 03:54:10 pm Yahoo Message Number: 92979Oh, I am always talking to people wherever I park, getting a conversation going over something. Well this morning, I talked to a couple in a Class C SOB (similar to my 26' LD) who told me they never put more than 70 lbs in their tires when leaving on a trip and therefore loaded. Isn't that too low? What pressure do you use? Mari (always nosy)
Re: Tire Pressures Reply #27 – May 28, 2008, 04:13:35 pm Yahoo Message Number: 92981I talked to a Quotecouple in a Class C SOB (similar to my 26' LD) who told me they never put more than 70 lbs in their tires when leaving on a trip and therefore loaded. Isn't that too low? What pressure do you use? No, it doesn't sound too low to me. It may, in fact, be too high. I don't remember now what pressures we used on our Lazy Daze, but it was the same as shown in both the Owner's Manual and on the driver's side door...60 front/65 rear???Linda Hylton http://map.datastormusers.com/user1.cfm?user=1167 http://earl-linda.blogspot.com/
Re: Tire Pressures Reply #28 – May 28, 2008, 04:52:41 pm Yahoo Message Number: 92982Yes, 65/60 is the recommendation on the door jamb and furthermore that matches the Michelin Tire chart recommendation for my LD's tires and weight.Joanne in Boston 1994 TK NE-44
Re: Tire Pressures Reply #29 – May 28, 2008, 05:31:33 pm Yahoo Message Number: 92984On Wed, 28 May 2008 19:54:08 -0000, "mskit417" wrote these inspiring words:QuoteWhat pressure do you use? I weigh all four wheels and use the pressure for the weight in the Lazy Daze manual.First step, get the rig weighed.Preparation: Fresh water 1/3 full, others empty. Propane full, Gasoline full. All clothes and supplies stored. All occupants in normal position.Weigh front and rear, then left and right. If side-to-side is quite different, consider moving stuff until you can get both sides about the same. Now consult your LD manual or your tire manufacturer (on line) to see what pressure is needed.There really is no short cut to safety.PS My pressures are different front and back, but are less than 70 pounds.Cheers, Don
Re: Tire Pressures Reply #30 – May 28, 2008, 07:53:23 pm Yahoo Message Number: 92995A lot of Light Truck tires are designed to run up to 80#'s of pressure, but that doesn't mean you would want that much in there. Mainly because it would ride like a brick. I just put new tires on my LD, and the shop put 65# all the way around. And it rides very nicely. I did put on new Bilstien's last weekend, which I will say made a huge difference. But I wouldn't run any more than 65lbs. I think the only reason you'd want super high pressures like 80 would be if it's a pickup truck and you are carrying an extremely heavy load.
Re: Tire Pressures Reply #31 – May 28, 2008, 09:52:11 pm Yahoo Message Number: 92998On May 28, 2008, at 4:53 PM, Dan Davis wrote:QuoteA lot of Light Truck tires are designed to run up to 80#'s of pressure, but that doesn't mean you would want that much in there. Mainly because it would ride like a brick. I just put new tires on my LD, and the shop put 65# all the way around. And it rides very nicely. ... I sure hope Joan Taylor chimes in here -- no one knows more about tires than Joan!My LD is a 26.5RB, fully loaded, and I live in it full time. My tires carry 80 pounds of pressure all the way around. I do not believe that my "rough" ride is because they are inflated to the max, but more a function of the condition of our roadways! Also, I'm adaptable -- the more I drive my coach, the more I get used to how it feels, and the less the ride feels hard or severe.After two blowouts, I simply do NOT mess with guessing. It's not a question of what I "want," what is a comfortable ride or, for that matter, what it says on my door panel. If the tires are inflated according to some unspecific "guideline," you're living on the fault line unless you have WEIGHED your coach first.Although it's preferable, you don't even have to get a four-corner weight in order to properly inflate your tires. Weight of front and back axles will suffice because weight ratings are for front tires and rear tires; side to side doesn't enter into that particular equation.Load your coach, weigh the two axles, *then* inflate your tires according to the tire manufacturer's guidelines. IMO, this is a safety issue, not a comfort issue.Lorna 1 Likes
Re: Tire Pressures Reply #32 – May 28, 2008, 10:31:14 pm Yahoo Message Number: 93004QuoteOn May 28, 2008, at 4:53 PM, Dan Davis wrote:A lot of Light Truck tires are designed to run up to 80#'s of pressure, but that doesn't mean you would want that much in there. Mainly because it would ride like a brick. I just put new tires on my LD, and theQuoteshop put 65# all the way around. And it rides very nicely. ...I sure hope Joan Taylor chimes in here -- no one knows more about tires than Joan!My LD is a 26.5RB, fully loaded, and I live in it full time. My tires carry 80 pounds of pressure all the way around. I do not believe that my "rough" ride is because they are inflated to the max, Quotebut more a function of the condition of our roadways! Also, I'm adaptable -- the more I drive my coach, the more I get used to how itQuotefeels, and the less the ride feels hard or severe.After two blowouts, I simply do NOT mess with guessing. It's not aQuotequestion of what I "want," what is a comfortable ride or, for that Quotematter, what it says on my door panel. If the tires are inflated according to some unspecific "guideline," you're living on the faultQuoteline unless you have WEIGHED your coach first.Although it's preferable, you don't even have to get a four- corner Quoteweight in order to properly inflate your tires. Weight of front andQuoteback axles will suffice because weight ratings are for front tires Quoteand rear tires; side to side doesn't enter into that particular equation.Load your coach, weigh the two axles, *then* inflate your tires according to the tire manufacturer's guidelines. IMO, this is a safety issue, not a comfort issue. Lorna Lorna, I'm in agreement with you at least 75-80 lbs is what I like to keep. I too have had blow-outs when I did not. Once, before I knew of LDs I owned another class C and had a blowout on the outside rear dually and while trying to slowly drive to the next exit on the shoulder, the inside tire on the same side blew out too since it now had all the weight. By the way the coach was brand new on its first trip and had only gone 5k miles. I've also seen it happen on MH that was owned by a friend who didn't believe tire pressure was an important issue. Isn't it a fact that most blow-outs are caused by under inflation? Mari
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Topic: tire pressures (Read 19 times)
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