Tire pressure for 13ft boler - Fiberglass RV


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Old 03-19-2018, 07:10 PM   #1
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Name: Nolan
Trailer: Boler 13ft 1972
British Columbia
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Tire pressure for 13ft boler

Hi. I am struggling to find proper inflation pressure for my boiler. Assume 1400 lbs or 1500 lbs spread over 2 185-80R-13 tires (maxxis). According to their website, inflating them to just 25psi would allow load of 990 lbs each. The table doesn't go lower. And this pressure seems really low. Could this be? We plan on driving cross country. Trailer has brakes, not that it makes a difference I think. Tires are new. Any input on your inflation pressure would be welcome.
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Old 03-19-2018, 07:30 PM   #2
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Tire pressure for 13ft boler

I run my Scamp 13, which is probably a little heavier than yours, at 40psi. I like having plenty of margin.

Running at the minimum required to support the weight is just asking for trouble. For one thing, trailers tend to gain weight over time as you add one more tool or gadget into the storage compartments. For another, a slow leak can more quickly turn into a blowout if you're running at minimum pressure.

There's actually nothing wrong with running at the full sidewall pressure. Some tire manufacturers advocate that, but I suspect they're thinking of utility trailers, where the weight can vary dramatically from one day to the next.

Some make the mistake of trying to compensate for a harsh ride by decreasing tire pressure. A good axle, appropriately rated for the weight of the trailer, should not need any help from the tires.
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Old 03-19-2018, 07:34 PM   #3
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Given that the OP is rejecting advice about towing with a Mazda 5, I have no plans to respond to any other queries about trailering.
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Old 03-19-2018, 08:16 PM   #4
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Trailer: 2004 13 ft Scamp Custom Deluxe
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Quote:
Originally Posted by nolan krombein View Post
Hi. I am struggling to find proper inflation pressure for my boiler. Assume 1400 lbs or 1500 lbs spread over 2 185-80R-13 tires (maxxis). According to their website, inflating them to just 25psi would allow load of 990 lbs each. The table doesn't go lower. And this pressure seems really low. Could this be? We plan on driving cross country. Trailer has brakes, not that it makes a difference I think. Tires are new. Any input on your inflation pressure would be welcome.
25PSI is the MINIMUM TIRE PRESSURE to prevent tire damage with a 990pound load.
It is really low and it can't be true because it isn't!
You don't say, but assuming they are "C" rated tires, run them at 50PSI cold inflation pressure.
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Old 03-19-2018, 08:21 PM   #5
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Name: Nolan
Trailer: Boler 13ft 1972
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Originally Posted by Glenn Baglo View Post
Given that the OP is rejecting advice about towing with a Mazda 5, I have no plans to respond to any other queries about trailering.
Nice one Glenn. Could you have made your point better by just not replying

Now, lets be nice again. Lets say I will be towing with an F150. Does that help?
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Old 03-19-2018, 09:11 PM   #6
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We always run our tires at max, they roll easier......... less fuel to tow, and handle potholes better less sidewall damage. When you pull over, at tea time, just walk around the rig, and put a hand on each tire, if a tire is getting hot it is either overloaded or under inflated.
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Old 03-19-2018, 09:11 PM   #7
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Thanks Floyd. They are c rated.
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Old 03-19-2018, 09:15 PM   #8
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Name: Nolan
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Im getting a sense to run them at max which is 50. But wont cold 50 + driving = higher warm pressure. Beyond max? Yhey probably factor that in...
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Old 03-19-2018, 09:18 PM   #9
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Ahhhh, tire manufacturers know more about their tires than what the tire is being mounted on... what does the side wall say? Do you really think a boler trailer that is loooong out of production can tell you what a new technology tire should be for tire pressure?
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Old 03-19-2018, 10:09 PM   #10
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Donna, my tires say "max 50 psi at 1650 lbs" or something like that (I'm not there now), so I wanted to know that if 50 psi was for 1650 lbs (or whatever), what would it be for half that which is more like my Boler would weigh. And then give it a margin of error.
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Old 03-20-2018, 12:22 AM   #11
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Quote:
Originally Posted by nolan krombein View Post
My tires say "max 50 psi at 1650 lbs" or something like that (I'm not there now), so I wanted to know that if 50 psi was for 1650 lbs (or whatever), what would it be for half that which is more like my Boler would weigh. And then give it a margin of error.
Interesting thread but I think you may be "splitting hairs" Nolan. No idea of why you want to run lower pressures because trailers are rolling earth quakes for their ride. Running your tires at half or so of the rated max pressure isn't going to give you any real advantage that I can see. If anything the temps may end up being higher because of sidewall flexing more. Personally, I wouldn't air down more that 5 psi from max stated pressure. There are many Boler owners here that can tell you what they run also. We do have a member here that comes from the tire manufacturing world, hopefully he will chime in for info on your question.
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Old 03-20-2018, 07:02 AM   #12
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Name: bob
Trailer: Was A-Liner now 13f Scamp
Missouri
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air in tires

we had been running 50lbs for our 13f scamper around 1,000lbl stuff would be scattered all over the trailer when we stopped. I reduced the pressure to 40lb now things are normal and I think the trailer tows better.

bob
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Old 03-20-2018, 08:59 AM   #13
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jon my 95 scamp has a new axle under it. at 50lbs the ride for the trailer is really rough by going to 40 like you did everything much better!


bob
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Old 03-20-2018, 09:29 AM   #14
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Name: MEX BOB
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I have a 13 ft Perris Pacer ! No bathroom ! I run my tires at 40lbs ! Happy medium ! Runs smoothly ! Not to hard !
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