What rear tyre pressures while towing our camper?

Submitted: Sunday, May 10, 2015 at 20:44
ThreadID: 117797 Views:2773 Replies:6 FollowUps:8
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We're hoping someone out there can give us an in sight to what rear tyre pressures on our 2012 Mazda BT- 50 should be while towing a 1 tonne camper with a down ball weight of 160 kgs.
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Reply By: Member - Paul B (WA) - Sunday, May 10, 2015 at 21:25

Sunday, May 10, 2015 at 21:25
Depends on the tyres, the load, the terrain and the speed, but generally it'd be around 40-45 psi and 3 or 4 psi higher than the front wheels.
Paul B Kalgoorlie

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Reply By: Member - Chooky and Wobble - Sunday, May 10, 2015 at 21:40

Sunday, May 10, 2015 at 21:40
We have a BT50 with a small caravan that weighs about 1.5 t. I have found for highway/ good roads I use the figures on the inside of the drivers door for heavy load but have the fronts a bit less.Thats with a reasonable load in the rear. With no load in the vehicle Id go to mid load settings.

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Follow Up By: Craig M1 - Monday, May 11, 2015 at 00:45

Monday, May 11, 2015 at 00:45
I have a land cruiser 200 series towing a Kimberly camper all fitted with Mickey Thompson tyres. The tow ball weight is around 300 kg , yes pretty high.
On sharp gravel or stoney roads and corrugated roads I run the vehicles rear tyres at 30 psi. This lowers the risk of damage to the tyre and smooths out the corrugations but you need to lower you speed accordingly.
Regards
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Reply By: Member - mike g2 - Monday, May 11, 2015 at 12:01

Monday, May 11, 2015 at 12:01
Hi L+ B, have a look on tyre itself ( or tyre plaque), quite a few I know of have load and recommended psi of tyre and the tyre details ( 16R etc..) as imprinted/ raised rubber writing. load to ea tyre should = vehicle tare+ contents weight inc fuel @ 1kg per L approx. + ball weight ,distributed over the 4 tyres- with allowance for slight front-rear difference as appropriate( eg: 35 front, 40 rear).
as others have also said: allow for terrain, etc.. and I would regularly check for long distance= hotter tyre. same applies to sand driving, Temp increases and your original 12-15psi that was good for soft going becomes a lot higher-have seen this on several bush/beach trips.
MG.
AnswerID: 553579

Reply By: Member - L and B (WA) - Monday, May 11, 2015 at 18:42

Monday, May 11, 2015 at 18:42
Thankyou everyone for your responses. Car and camper ready to head off to Gibb River in three weeks. All fully loaded up. Rear tyres just looked low. Was just wondering what everyone else was doing with there rear tyre pressure.

Cheers L and B
AnswerID: 553594

Follow Up By: Member - Wildmax - Monday, May 11, 2015 at 18:53

Monday, May 11, 2015 at 18:53
If you're on the Gibb, I'd suggest high 20s for the rear and mid to low 20s for the front - assuming you're using LT tyres or others with a decent load rating.
If you stay with the manufacturer's higher recommended pressures on sharp gravel you have a higher risk of puncturing.
Enjoy the trip and make sure you do the detour to the Mitchell Plateau.
Cheers
Wildmax
2018 Hilux pulling AOR Eclipse
Black Wolf 210 tent

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Follow Up By: Member - L and B (WA) - Monday, May 11, 2015 at 19:41

Monday, May 11, 2015 at 19:41
Thanks Wildmax for this info, will certainly take this into consideration on the trip. We are so looking forward to this trip & Mitchell Plateau is high on the "To Do List", as well as all the must see attractions along the way. Can't wait!
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Follow Up By: swampfox - Monday, May 11, 2015 at 22:59

Monday, May 11, 2015 at 22:59
HI
A little heavy on the ball weight if thats FULLY loaded, total 1 ton camper .
If the campers tare plus extras equals around 1.4-1.6 ton that's ok
The factory rear springs survive way better with little or the appropriate weight on them .[prevents premature sagging ]

swampfox
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Follow Up By: Member - mike g2 - Tuesday, May 12, 2015 at 09:45

Tuesday, May 12, 2015 at 09:45
Note swampfox comment- Agree, springs, shockies , tyre/rim all can change if you spend more on HD ones, and then there's a 2" lift - All if considered needed-many recommend for off road 4x4 .
MG.
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Follow Up By: Member - L and B (WA) - Tuesday, May 12, 2015 at 19:54

Tuesday, May 12, 2015 at 19:54
Thanks swampfox and mike g2. We do have a 2in lift kit with constant 300kg leaf springs on rear. Got that done not long ago in preparation for this trip.
Cheers L and B
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Reply By: Member - Judy and Laurie - Tuesday, May 12, 2015 at 08:17

Tuesday, May 12, 2015 at 08:17
Hi we have a 100 series towing an Aussie swag camper and did the gibb river road a couple of years ago and we had to change our pressures often according to the terrain, so make sure you carry a good air compressor and tyre gauge , have a wonderful trip and travel safe
Cheers Judy and Laurie
AnswerID: 553619

Follow Up By: Member - L and B (WA) - Tuesday, May 12, 2015 at 20:08

Tuesday, May 12, 2015 at 20:08
Thanks Judy and Laurie for the information. Air compressor and tyre gauge have all been checked and packed, with everything else. We can't wait to get on the road.

Thanks again.
L and B
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FollowupID: 839548

Reply By: kcandco - Tuesday, May 12, 2015 at 18:14

Tuesday, May 12, 2015 at 18:14
Hi

I have a 2011 BT50 2.5 diesel ute 2wd. I tow a small van. I have placed it over a weighbridge and when loaded with all my gear including a small boat on the ute, weights are as follows

Front tyres combined: 1000kg running 29 PSI
Rear tyres combined: 1500kg running 44 PSI
Van tyres combined: 900kg running 50 PSI on 165.13 8 ply LT tyres.

Ball weight is approx 140kg.

Pressures derived by taking actual load on tyre divided by max permissible load on tyre multiplied by max tyre pressure, ie for a 500KG actual load on each tyre with max load rating of 800KG each @ 65 PSI, would be 500/800x65 = 40.625 PSI.

regards Kevin
AnswerID: 553645

Follow Up By: swampfox - Wednesday, May 13, 2015 at 12:29

Wednesday, May 13, 2015 at 12:29
hi
Challenging to under stand your methods tyre pressure vs load .
Is this the formula by which the tyre charts are derived from ??
I prefer the info below

1st/ There is a standard tyre industry chart according to tyre load specs

2nd/ An addition to that is the relevant tyre pressure chart for each weight vs tyre pressure [for every 10 kgs ]

3rd what will limit your carrying capacity is the limit spec for your axle

cheers swamp fox
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