Hi, just picked up my 2007 bailey pageant Bretagne, dispatch team tel me 62 psi yet on label on van says 42 psi ???
(alloy wheels)
(alloy wheels)
Tyre pressures
- Thread starter Smurff
- Start date
- Nov 11, 2009
- 24,680
- 8,853
- 50,935
My Bordeaux had 42psi withe Trailermaxx tyres which was in line with the van tally plate. I upgraded the payload and then uprated the tyres which now have a higher Load Index. But I did notice that the Trailermaxx tyres I had only hada 42psi maximum inflation pressure. If I were you I would contact Bailey with the van VIN number etc and ask their advice, Ive found them very helpful.
62 sounds like the pressure for maximum tyre load, usually significantly beyond the MTPLM - but some manufacturers can't be bothered to do simple arithmetic and work out the correct pressure for the actual MTPLM.Damian-Moderator said:
- Nov 11, 2009
- 24,680
- 8,853
- 50,935
RogerL said:
I am not sure that 62psi for the single axle is correct as the Bretagne has a MTPLM of around 1400-1420kg. For the year in question I supect Bailey were still fitting Trailermaxx with an inflation pressuer of 42psi, but when I looked at mine that was also the tyres' maximum inflation pressure. Since my van had the load upgrade to 1400kg and the combined maximum load of the tyres was 1420kg I decided to upgrade the tyres to a higher Load Index. But because the new tyres were a higher LI they had to be inflated to a higher pressure. In my case this was 53psi which was very similar to the pressure recommened by Bailey for the heavier Series 5 Senator single axles. I appreciate that tyres have an in built reserve but I felt much happier with the upgraded tyres which were Firestone Vanhawks made by Bridgestone for commercial "white van man". I was advised that having higher pressure and stiffer tyres would shake the van to pieces. But if a similar weight Senator (+100kg) with ostensibly the same method for attaching the internal fittings can run on 55 psi tyres without shaking itself apart then my Bordeaux should be okay. Outcome is that Bordeaux is still in one piece and I am so much happier with the twin patches of rubber between the van and the road. Bailey were most helpful when I contacted their Tech Dept to discuss this.
The Trailermaxx fitted to my 1500kg MTPLM Lunar have maximum pressure 65 psi and maximum load 900kg (1800kg axle load) and Lunar are happy for me to use 54 psi without giving any warranty/safety issues.
Contact Customer Services at your caravan manufacturer - but be prepared to educate them !
Contact Customer Services at your caravan manufacturer - but be prepared to educate them !
- Nov 11, 2009
- 24,680
- 8,853
- 50,935
If the OP has the Bailey Service Handbook for the caravan it will give MTPLM, tyre size, tyre Load Index and tyre inflation pressure. He doesn't need to know the tyres maximum operating inflation pressure everything required is in the handbook. If the OP doesn't have the service handbook then he should ask Bailey to provide the above details for his van by giving them its CRIS number. It's not a case of educating the manufacturer. Only if his payload has been upgraded or he wants to change tyre specification would wider discussion be required.
Oh, it is a case of educating caravan manufacturers!
Too often they simply quote the maximum pressure for the tyre and totally ignore the actual MTPLM, which should be at least 10% less than the tyre's maximum load. When it comes to tyres, caravan manufacturers DON'T know it all !
The problem is that none of us can ignore the caravan manufacturers' recommendations if it goes wrong.
Too often they simply quote the maximum pressure for the tyre and totally ignore the actual MTPLM, which should be at least 10% less than the tyre's maximum load. When it comes to tyres, caravan manufacturers DON'T know it all !
The problem is that none of us can ignore the caravan manufacturers' recommendations if it goes wrong.
42psi is the maximum pressure of a 'reinforced' tyre, 65psi is maximum for a Commercial van tyre, AKA 8ply tyre. So this looks like a confusion between two possible types of tyres fitted?
So simple enough, what is the size and load index of the tyre and the MTPLM of the van?
So simple enough, what is the size and load index of the tyre and the MTPLM of the van?
This post is obviously related to your other about tyre suitability so you are now aware the tyres fitted are under rated by any definition of the term. The same size and type though is made with a 96Li and this is technically legal but running at it's absolute maximum of 1420kg per pair.
So answer is tyres fitted are unsuitable, the 96 version is, barely, but pressure should be 42psi certainly not 62 which could well be dangerous but is certainly illegal.
To then follow on from my post in your other question, the three possible alternate tyres I mentioned have a maxium pressure of 65 or 69psi and out of that, a pair of them carrying 1420kg, would require;
175R14C 99 @ 58psi
185/75R14C 102 @ 55psi
185R14C 102 @ 52psi
Note; 1st and 2nd are 'standard 80% aspect ratio' so the 80 is not normally included, certainly not on the tyre, however it may well be how it's shown on tyre sales websites, ie 175/80R14C 99 and 185/80R14C 102
So answer is tyres fitted are unsuitable, the 96 version is, barely, but pressure should be 42psi certainly not 62 which could well be dangerous but is certainly illegal.
To then follow on from my post in your other question, the three possible alternate tyres I mentioned have a maxium pressure of 65 or 69psi and out of that, a pair of them carrying 1420kg, would require;
175R14C 99 @ 58psi
185/75R14C 102 @ 55psi
185R14C 102 @ 52psi
Note; 1st and 2nd are 'standard 80% aspect ratio' so the 80 is not normally included, certainly not on the tyre, however it may well be how it's shown on tyre sales websites, ie 175/80R14C 99 and 185/80R14C 102
Facebook
Twitter