Cold weather and tubes

steco1958 · 15 December 2018, 09:18

Merry Christmas everyone , quick question !!

My rib is currently in the garden on trailer and axle stands, question is, with the cold weather the tubes deflate, would you keep adjusting pressure, or just leave it?

TIA

Steve

neil.mccrirrick · 15 December 2018, 11:09

I leave mine unless there is a sag that’s noticeable. Temp change will have you in and out constantly if you want them to stay firm. If you do top them up remember to check when the weather turns

lakelandterrier · 15 December 2018, 17:45

I second Neil's advice. I top up once I settle the boat for the winter, then leave them unless they get noticably soft.

Bobg · 16 December 2018, 16:59

I agree, so long as they are not sagging and possibly creasing in the coldest weather, pump then up just enought so that they keep their shape. The pressure on mine is about 0.8 bar. That should cope with a wide variation in temperature and hence tube pressure

Orwell boy · 16 December 2018, 20:19

Quote:

Originally Posted by Bobg

I agree, so long as they are not sagging and possibly creasing in the coldest weather, pump then up just enought so that they keep their shape. The pressure on mine is about 0.8 bar. That should cope with a wide variation in temperature and hence tube pressure

Do you not mean 0.8 psi ?? ,0.8 bar is 11.6 psi

Bobg · 16 December 2018, 20:24

11.6 psi is 0.8 bar. The exact pressure is not important, the tubes just need to be 'In Shape' without any sagging or creasing on the coldest days. They will feel soft.

GuyC · 16 December 2018, 21:38

Quote:

Originally Posted by Bobg

11.6 psi is 0.8 bar. The exact pressure is not important, the tubes just need to be 'In Shape' without any sagging or creasing on the coldest days. They will feel soft.

Normally tubes are inflated to 2 - 2.5 psi (0.14 - 0.17 bar). If you were to inflate to 0.8 bar assuming you don't have pressure relief valves, then I think you'd run the risk of damaging your tubes.

69cmw · 16 December 2018, 21:39

Quote:

Originally Posted by Bobg

11.6 psi is 0.8 bar. The exact pressure is not important.

Try pumping them up to 0.8 bar and see if you still think that [emoji848]

smallribber · 17 December 2018, 22:43

Quote:

Originally Posted by Bobg

11.6 psi is 0.8 bar. The exact pressure is not important, the tubes just need to be 'In Shape' without any sagging or creasing on the coldest days. They will feel soft.

When you make a mistake best to admit it then you look less stupid

Bobg · 17 December 2018, 23:06

Quote:

Originally Posted by 69cmw

Try pumping them up to 0.8 bar and see if you still think that [emoji848]

That's what it said on my electric pump, set to shut off at 0.8bar. Zodiac classic 550 pro. I have done this for the last 5 years
But you have ommited my other comment. The exact pressure is unimportant.. It is the shape which matters, no sagging or increasing at the lowest possible pressure. This will be different for different rib types. I used to consider my tubes to be much softer than the many other rib types i have driven

chipko · 17 December 2018, 23:14

Quote:

Originally Posted by Bobg

That's what it said on my electric pump, set to shut off at 0.8bar. Zodiac classic 550 pro. I have done this for the last 5 years

Jeez! Those Zodiac toobs must be built real hardcore.

smallribber · 18 December 2018, 06:50

Quote:

Originally Posted by Bobg

That's what it said on my electric pump, set to shut off at 0.8bar. Zodiac classic 550 pro. I have done this for the last 5 years
But you have ommited my other comment. The exact pressure is unimportant.. It is the shape which matters, no sagging or increasing at the lowest possible pressure. This will be different for different rib types. I used to consider my tubes to be much softer than the many other rib types i have driven

And so you continue..... So you are clear...….. 0.8 bar is the sort of pressure you would put in the floor of a high pressure floor on a sib... 0.8 bar in tubes is simply ridiculous Tubes should be about 0.25 bar. You came on here to give advice regarding tube pressure and continue to demonstrate that you don't really have a clue.... Please spend a moment searching the net so that you don't mislead people into breaking their ribs

Fender · 18 December 2018, 08:39

Quote:

Originally Posted by Bigplumbs

When you make a mistake best to admit it then you look less stupid

Pot, Kettle.....................

Pikey Dave · 18 December 2018, 18:35

Quote:

Originally Posted by Fender

Pot, Kettle.....................

‘Appen he’s learning [emoji57]

boristhebold · 28 December 2018, 19:31

I checked mine the other day, soft but not sagging, I tend to leave them soft if its cold because a nice sunny day can inflate them easily, you dont wont hard tubes on a cold day cos the sun may over inflate them if you get any sun. I guess its a matter of how soft, if sagging then yes would inflate a tad but still leave soft if boat is not being used.