Storage tire pressure?

ZmOz

Captain
Joined
Aug 13, 2003
Messages
3,949
I have a 12" square concrete block under each tire on my boat's trailer for the winter. What pressure should the tires be at? The max printed on the sidewall like I do for towing (only 35 psi I think) or should I lower it during storage?
 

JRJ

Commander
Joined
Sep 11, 2001
Messages
2,992
Re: Storage tire pressure?

I keep mine at operating pressure.
 

KM2

Chief Petty Officer
Joined
Oct 15, 2003
Messages
556
Re: Storage tire pressure?

I read something about tires getting "flat spots" during storage once so I would go max pressure.
 

Al Kungel

Petty Officer 2nd Class
Joined
Jul 9, 2004
Messages
144
Re: Storage tire pressure?

Jack the trailer up and place some blocks under the axle, thereby taking the weight off the tires and wheels.
 

rwidman

Lieutenant
Joined
May 27, 2004
Messages
1,396
Re: Storage tire pressure?

If the weight of the trailer is on them, then keep them inflated to the maximum. They may loose pressure over time so check them every month or two.
 

jlinder

Lieutenant Junior Grade
Joined
Jul 5, 2004
Messages
1,086
Re: Storage tire pressure?

When taking the weight off the tires for the winter I would rethink the cement blocks.<br /><br />Depending on the weight of the boat and the number of blocks you use you may have problems.<br /><br />Buy some jack stands rated for the weight. They are pretty cheap. And use some wood between the stands and the frame to keep from scratching the paint.
 

4poco

Petty Officer 2nd Class
Joined
May 14, 2005
Messages
134
Re: Storage tire pressure?

Read somewhere to lower the pressure to 20 lbs. with weight off tires. Why? I dont have any idea....... But did it anyway.
 

Pony

Rear Admiral
Joined
Jun 27, 2004
Messages
4,355
Re: Storage tire pressure?

ZmOz- I have stuggled with that question as well, and have chosen to avoid it. <br /><br />My first thought when i was considering this for my trailer was "How is the concrete any different that rock hard solid ground?". Are we really doing any good to our tires by doing that if its the same? <br /><br />Personaly I prop up my trailer and remove the tires and keep them inside. I'm not sure if extreme cold and non use do anything to a tire, so i keep them in my basement. <br /><br />I imagine if one were to keep the tires on blocks you'd want near maximum pressure as discribed by the "cold" psi.
 

moze229

Cadet
Joined
Jul 3, 2005
Messages
6
Re: Storage tire pressure?

I'd like to get my trailer tires off the ground as well. What about positioning the stands on the frame close to the springs? I've been reading through some of the posts and now I'm scared to do it. : ) If I change or repack bearings I usually jack from the axle and put jack stands under the frame. Perhaps I shouldn't do this? Maybe I'll just leave the tires on and roll the trailer around every once in a while. :) Thanks for any suggestions or help.<br /><br />Matt
 

craze1cars

Lieutenant Commander
Joined
Dec 26, 2004
Messages
1,822
Re: Storage tire pressure?

This is being made out to be much more difficult than it really is. So I'll do my best to make it even MORE confusing...<br /><br />Everyone go back and reread the first question. Zmoz talks about putting blocks under the tires. Why? I have no idea...I suppose maybe he parks on muddy ground and wants to prevent the trailer from sinking and getting stuck, which is good. Then AIK recommends putting the blocks under the axle instead of under the tires, so the tires hover, presumably to prevent flat-spots/rot, which is also a fine plan, except for the major flaw that JackL points out...very unsafe because blocks can suddenly crumble at any given moment under the weight and kill small children or crush your skull. So he appropriately recommends jack stands and scratch protection, ALSO good.<br /><br />So what should be done, if anything? What JackL says. Put REAL jackstands (NEVER concrete blocks) under the frame, or under the axle. Doesn't really matter which as long as it's securely supported near the wheels to keep weight distribution and balance similar to normal. Scratch protection is a nice addition if you care about your pretty rig. There's nothing to be afraid of, won't hurt a thing either way...the frame AND the axle are more than capable of carrying this load. And if you find they're not, you needed a new trailer anyway. <br /><br />Alternative # 2....leave the durn thing on the ground. Tens of thousands of boat trailer tires support their weight all year long, and are doing just fine. It would be wise to keep an eye on pressure, and an occasional roll-around certainly is not a bad plan.<br /><br />As for the original question, if the tires are supporting the full weight of the boat, they need to remain properly inflated to support their rated load. And if they're raised completely off the ground, it really doesn't matter if pressure is kept at 50 or 5 (I'd certainly avoid zero for fear of the beads unseating). But it seems rather senseless to me to waste time letting air out. Just ignore them when you raise them, but be sure bring them back up to 50 (or whatever they're supposed to be) before dropping the weight back down on the tires in spring.<br /><br />And I'm surprised this hasn't been mentioned at all yet, the most destructive thing to tires is UV rays from the sun. So raised, lowered, flat, or pressurized won't make a hill of beans if you let the sun beat on them all winter. So the best protection you can offer your tires in the off season is to keep them out of the sun...garaged, indoors, or covered.<br /><br />Hope my essay helps clear things up a bit. And now is the designated time for others to chime in here and disagree what I've said....
 

ST

Petty Officer 2nd Class
Joined
Jul 25, 2005
Messages
192
Re: Storage tire pressure?

Well written essay, craze! Seems like noone disagrees! :)
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: Storage tire pressure?

I for one don't see anything to disagree with craze.....good sumation..... :)
 
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