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Post by Juan on Mar 13, 2016 6:06:35 GMT -6
How much air pressure should I have in my trailer tires if the tires state: Max pressure 50 psi (cold)?
I've always tried to run the maximum psi stated on the tire but now I'm told that I'm probably running too much air pressure since the tire pressure increases as it gets hot.
So, Is 50 psi when the tire is cold too much air?
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Post by mcsd63 on Mar 13, 2016 10:28:16 GMT -6
Tires can have 2 different pressure recommendations. One brand may say inflate to 50psi cold. Another, like yours might say 50psi max pressure.
If it's 50 max pressure the trailer will usually have a pressure sticker on it. Either way what you are being told is wrong.
Tires are designed with pressure increase in mind. If you look up tire inflation instructions it will usually have you to add a certain psi if the tire is already warm.
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Post by Juan on Mar 13, 2016 14:44:43 GMT -6
Thank you... I didn't know that and I'll stick with the 50 psi
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Post by gtightline on Mar 13, 2016 21:50:35 GMT -6
A fully inflated tire, in other words inflated to it's recommended max, always runs cooler...
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Post by Juan on Mar 14, 2016 5:18:45 GMT -6
A fully inflated tire, in other words inflated to it's recommended max, always runs cooler... I know what you mean but that can be confusing cuz the pressure in a fully inflated tire inflated to it's recommended max pressure when cold goes up quite a bit as the tire gets hotter. It's really noticeable if you inflate the tires to the max on a cold day and then check the pressure on a hot day or after a drive. |
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Post by gnrphil on Mar 14, 2016 6:37:39 GMT -6
Whats important is the load rating on the tire, then inflate to the maximum cold pressure.
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fraydknot
Master Chief
Life is a collection of Memories.
Posts: 384
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Post by fraydknot on Apr 8, 2016 1:05:55 GMT -6
I run 5 psi below the max to allow for some heat expansion.
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Post by Juan on Apr 8, 2016 4:44:09 GMT -6
I run 5 psi below the max to allow for some heat expansion. That makes sense to me.. especially since the tires will be over inflated if filled to max cold pressure and then they expand while in use.. and that makes them wear out quicker.. My latest problem is finding a digital air pressure gauge that reads accurately. I've bought 3 different digital gauges and all three vary in psi reading from 1 to 5 psi. I'm starting to think that 4 or 5 psi doesn't matter much. |
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Post by gnrphil on Apr 8, 2016 6:13:35 GMT -6
Just my opinion, I would assume that the tire manufacturer would have taken in account heat expansion when setting max or recommended cold tire pressures. Saying that one should never assume  |
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Post by freezerfiller on Apr 8, 2016 16:00:20 GMT -6
Although I don't do it on cars/trucks, I always run max pressure on my trailers. I do so because it runs cooler, and I have never had to replace a trailer tire that was out of tread. I've replaced at least 10 dry rotted, cupped from bearing failure, sidewall failure, etc.
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Post by gtightline on Apr 11, 2016 4:56:29 GMT -6
I agree with Frezerfiller, in my truck driving days, mid - late 70's we always ran our tires at max cold tire pressure. Tires always ran smoother,cooler,...and always wore even. Southern Cross is right about blow outs on under inflated tires. Less air more road friction, means hotter running tire.....Just talking from my personal experiences. I always keep my tires at recommended cold pressure, by cold I mean on a tire that has not been run...NOT on weather temp...just saying...  |
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Post by Simple Man on Apr 11, 2016 19:46:24 GMT -6
I just brought mine up to 30 psi. I only travel 2 miles to the launch though and only when I have to put my boat on the trailer to work on it so I'm not a good reference...
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mosquito13
Lieutenant
Posts: 788 
Location: the other West Coast
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Post by mosquito13 on Nov 12, 2016 7:12:51 GMT -6
I purchased new tires and asked the manufacturer when I ordered them. Was told to keep them at max. psi( 50 for my tires) . Explained less would decrease their load caring capacity. For those who drop psi on a cold fill, have you checked psi after a long haul to see how much it came up?
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