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Old 14 July 2012, 15:06   #11
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Is it best then Trailer Guy to just inflate the tyres to the psi stated on the tyre and leave it at that, being as the maximum pressure stated is cold.

Hi Kerny, it's what I do on every trailer service, providing the tyres are cold.
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Old 14 July 2012, 15:08   #12
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Hi Kerny, it's what I do on every trailer service, providing the tyres are cold.
Thanks TG I will stick to that then
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Old 14 July 2012, 16:17   #13
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Thanks TG I will stick to that then
It depends what you are doing ... sometimes if you need to launch over a pebbly/rocky shore for example, having really hard tyres makes your boat jump about whilst you manouvre over them.

Personally I never inflate to maximum, full pressure is more likely to pick up punctures from debris IMO due to less ability to flex, and also removes some inherent suspension ability of the tyre its self. It also impairs road holding, and your trailer will behave differently with regards to drift etc. The sidewalls play quite an important part in this regard, and do the job less effectively if they are really stiff.

Everyone will have their own view ofcourse, having trailed many different types of trailers both at work and play, with a wide variety of loads, Ive concluded it just seems to work best this way
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Old 14 July 2012, 16:22   #14
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Quote:
Originally Posted by Bigmuz7 View Post
It depends what you are doing ... sometimes if you need to launch over a pebbly/rocky shore for example, having really hard tyres makes your boat jump about whilst you manouvre over them.

Personally I never inflate to maximum, full pressure is more likely to pick up punctures from debris IMO due to less ability to flex, and also removes some inherent suspension ability of the tyre its self. It also impairs road holding, and your trailer will behave differently with regards to drift etc. The sidewalls play quite an important part in this regard, and do the job less effectively if they are really stiff.

Everyone will have their own view ofcourse, having trailed many different types of trailers both at work and play, with a wide variety of loads, Ive concluded it just seems to work best this way
muz7 my tyres say max 44psi so would it be a safe bet then to run at 40psi for road use ?
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Old 14 July 2012, 16:27   #15
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I am with muz on this one mine are 65 psi max but I run mine around 60 psi
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Old 14 July 2012, 16:30   #16
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I've always run mine a shade under max, on the basis that I wasn't running them under the full load they were designed to carry.
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Old 14 July 2012, 16:37   #17
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Mines an unbraked trailer and the maximum limit is 750kg so when the rib is loaded with fuel, anchor and equipment I'm up to the limit.
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Old 14 July 2012, 16:45   #18
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Quote:
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muz7 my tyres say max 44psi so would it be a safe bet then to run at 40psi for road use ?
Well .. My 5.4 Tornado sits on a single axle trailer, but its quite a light boat,because its only a single console etc etc and I cant rember the tyre size coz its at work.. but from memory .. thats the max pressure on mine aswell, I checked them recently because one looked a bit softer than I would like, on checking it was at 30 so I put it to 35 and it looks fine at that, and more importantly .. equalled the other one.

Its all relative to the load its carrying, the tyre will have it stamped on it as to what its maximum load is.

If you need to use the trailer in particularly arduous terrain, you can also fit it with higher load index tyres, with heavier lay up, but again road performance varies accordingly.

I'd normally expect to see some sidewall deformity under normal conditions and load.

With a lot of modern cars using low profile stuff, we are very used to seeing no deformity at all these days on a tyre, but trailer tyres have a much larger sidewall and need to be assessed differently
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Old 15 July 2012, 11:30   #19
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Agree with all of the above - it's all relative and down to your personal discretion and preference.

Trouble is, when you're doing paid work, for someone else (who often isn't there, on site), you need to make a decision over the requirement and the last thing I want is someone ringing me to tell me I haven't inflated their tyres enough etc. I guess what I'm saying is I've got to do them all the same and if I inflate them to the tyre pressure stated on the wall / in my notes, then it's up to the customer if they want to run them at a deifferent pressure.

As everyone says - have a tow and make an educated decision, on the result, at the end of it.
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Old 15 July 2012, 11:49   #20
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Thanks for all your advice TG, and yes I think common sense is the major factor here, like willk says, if you are up to the trailer weight limit then Maximum air pressure.
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