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Post by Juan on Jun 2, 2021 4:14:07 GMT -6
I had planned to fish today so checked and topped off the air in the trailer tires yesterday afternoon... My tire gauge reads several different pressures, (psi, kgm, etc) Apparently I had unknowingly hit the button and changed the display from psi to kgm and put 77 pounds of air in tires that have a max rating of 50 psi.. I made it almost 10 miles before I heard the BOOM! Getting a new trailer tire and maybe new tires on the truck today instead of fishing as planned. btw: How much pressure should you run in your vehicle's tires if the sticker on the door says one thing and the max tire pressure on the tire says another? I've always heard that you should inflate your tires to the max cold rating displayed on the tire but I've also read you should inflate only to the psi displayed on the label in the door jamb? My truck tires say 44 psi max (cold) but I've been inflating to the psi displayed on the label and 50,000 mile tires aren't lasting anywhere near that. Any recommendations for truck tires? I'm thinking maybe 70,000 miles tires this time around?
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Post by gnrphil on Jun 2, 2021 7:39:35 GMT -6
Inflate the truck tires to the vehicle manufacturer recommendations, two different vehicles using the same tire size may have different pressures. The max psi on the tire is only the max it's rated for, not what you should inflate too.
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Post by Juan on Jun 2, 2021 7:42:28 GMT -6
I've been buying my tires from the same tire center for over 20 years and until now, trusted their advice. They're telling me to go by the sticker in the door jamb for my truck no matter what the tire says and to put no mre than 35 psi in my trailer tires even if the tires say 50 psi cold. I've been running 50 psi in my trailers forever.
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catchersrock
Ensign
Posts: 549
Location: Maiden NC
Sea Pro model and year: 2020 Sea Pro 228
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Post by catchersrock on Jun 2, 2021 7:44:21 GMT -6
The tire pressure shown on the door is for the recommended tires, the tires put on at the factory. If the tires on your truck are not the recommended tires, they may have a different pressure shown on the actual tires. I run 3/4 ton trucks, the recommended tires are 10 ply. This is so that the truck can haul and tow the advertised loads. 10 ply tires take more air pressure and ride like train wheels. I run them a little lower to soften the ride a little. This can also certainly be reversed. If you run a heavier tire than factory recommended for your truck, you will run a higher pressure than the door jamb calls for.
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Post by Juan on Jun 2, 2021 10:39:07 GMT -6
See what I mean? this is confusing! I just bought another new trailer tire and spent another $1,000 on new truck tires while I was there so I want to get this right. I agree with catcher's answer but not everyone does... I understand using the psi rating on the data label in the door jamb if you still have the original tires or some exactly the same but if you've changed tires to a different brand or mileage rating, it's going to require a different psi (at least imo). The vehicle can't tell what size or brand of tires are on it so it seems to me you would have to inflate the tires to the psi rating on the tire and not the door jamb but do you inflate to the maximum psi or something below that? I've read that you should always inflate to the maximum psi rating and do so when the tires are cold. I know the psi increases with temperature but the manufacturers are supposed to take that into account? I just deflated my trailer tires from the 50 psi I normally run to 40 psi and they look really low so I'm going back to the max rating of 50!
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catchersrock
Ensign
Posts: 549
Location: Maiden NC
Sea Pro model and year: 2020 Sea Pro 228
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Post by catchersrock on Jun 2, 2021 12:38:29 GMT -6
Maximum pressure on the tire is the MAXIMUM. You can run less, but not too much less. I know thats not a hard and firm answer. Cold max pressure is a good general starting point at a cold state, which is parked over night and cool to the touch. If you over inflate the tires, they will ride rough and wear out the tread in the center of the tire patch faster than the edges. If you under inflate, the ride will be softer, even to spongy, and, will wear out the tread on the edges sooner. Under inflated tires also use more gas than correctly inflated to slightly over inflated.
Run trailer tires as the max cold rating, checked cold. They will wear correctly and pull better. But, make sure your trailer tires match the rating and loading of the trailer. Just like trucks, there are different trailer tires. My rule for life in general, but, never trust anyone, especially a salesman.
Set your truck tires for what you want. I run mine 5 psi under the cold rating. 10 ply's dont mind it and it rides and handles better. Dont be afraid to play around with it, make small adjustments and drive it around. You can notice a difference.
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Post by freezerfiller on Jun 2, 2021 15:03:16 GMT -6
I run my truck tires at 35 (44 max rated). I run my trailer tires within 5 lbs of max just to keep the sidewalls from flexing and heating. I finally bought load range D tires on all 4 of my trailer (and the spare) after putting them on the front for a few years with good results.
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Post by Juan on Jun 2, 2021 15:39:33 GMT -6
Well I'm not sure what pressure I should be running but I was running 50 psi in the trailer tires and thought that was the max rating but checked again and the max is 65 psi so I'm still running 50 in the trailer tires. The old truck tires were rated at 44 psi and I too ran 35 in those but the new tires are rated at 51 psi so I'm running 40 psi in them. I guess I'll just have to wait and see how they wear. I do know this much: NEVER put 77 lbs of air in a tire rated at 65 psi max... It will explode. I wish I had thought to take a picture of that tire.
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985crabs
Captain
2000 V1900 Bay Series, Yamaha 150 Carb. 2
Posts: 1,317
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Post by 985crabs on Jun 3, 2021 10:46:54 GMT -6
I don't know if there is a true answer, but I like the idea of running trailer tires 5 lbs. below the max. cold rating. Where I live it can be 65 in the morning and 95 in the afternoon. That's a huge delta. I wouldn't want to be at max. and then go up 30 while on the road. Something might go "Boom!".
I run Michelin Defenders on my trucks and go by the door jam. Always smooth and I get great tire longevity.
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