 | Home > Wheels & Tyres > Tyre pressures |
 
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| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665   
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Yep, 48 in the back (unladen) rattles the fillings out.
I use 30 (F) and 40 (R), but have tried 38 in the back to good effect. 30/40 seems a good compromise in ride comfort without damaging fuel economy (!). Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's) |
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25th Nov 2013 10:59am |
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| kirk Member Since: 08 Dec 2012 Location: Abu Dhabi, UAE Posts: 28  
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Doesnt tire pressure depend on the tires the vehicile rides on? Mine has Goodyear ATs and I always thought 30psi front and rear would be a good number. Can't imagine putting 40 or 48 psi in those. I think they would explode.
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25th Nov 2013 5:36pm |
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| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665
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In the Owners Manual is simply states:
 Click image to enlarge ...but as the OP states, 48PSI rear is far to rattly when unladen 48 rides well tho, when reasonably laden... Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's) |
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25th Nov 2013 5:45pm |
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| CEEGEE Member Since: 02 Oct 2013 Location: Yorkshire Posts: 135 
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I've just put on some (new to me) wheels with General Grabber TR 235 85 16's, and wanted to double check the pressures.
Handbook says 29 psi front, 36 psi rear. Also rang the local dealer who checked the advisory sticker on a Defender in the showroom with the same spec tyres, and he said it read 30 front and 38 rear. |
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25th Nov 2013 5:50pm |
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| TR51 Member Since: 17 Apr 2012 Location: Dorset UK Posts: 333  
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Best way to check pressures for YOUR standard load, is to run a line of chalk accross the width of the tyre and drive over it on flat hard ground until it begins to fade... if the center rubs out before the edges, the pressure is too high and vice versa.
Aim to get an even fade accross the entire width  |
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25th Nov 2013 5:54pm |
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| milesr3 Member Since: 12 Feb 2013 Location: Suffolk Posts: 873 
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Tyre pressure is just a product of the load on the axle and the tyre section. Interesting that the rear pressure in a 90 is 38psi. That has to be a good yardstick for an unladen 110 / up to 2 passengers.
Anyway 40psi feels a lot less harsh on std contis and as a bonus the headlights are pointing a bit further up the road. Thanks! The Yokohamas on my Elise have little circular markers in the shoulder and you can tweak the pressures to wear right up to these. 0.5psi makes a noticeable difference in that, but I haven't got the same feeling for the defender! 
In my experience, handbook pressures err on the side of caution where the vehicle is driven at max speed and max load on cold tyres. Last edited by milesr3 on 25th Nov 2013 6:09pm. Edited 2 times in total |
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25th Nov 2013 5:58pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20412
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I always run 32F 38R PSi.
Always worked off me on my 90 for general use. $W33T $0U7H3RN $UG4R 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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25th Nov 2013 6:05pm |
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| WelshGas Member Since: 01 Oct 2010 Location: Vale of Glamorgan Posts: 935  
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On my 90XS SW running pressures as detailed in the handbook, 30F 38R, I got wear in the centre of the tyre tread. Dropped pressures to 28F 34R produced uniform wear across the whole tread width.
LANDYWATCH
Neighbourhood Watch for Land Rover Owners http://www.landywatch.co.uk/smf2/index.php |
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25th Nov 2013 7:28pm |
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| Lou Sparts Member Since: 15 Apr 2012 Location: Kent Posts: 1501 
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I run my ninety at 30f/35r tyre wear seems even and has the added bonus of the CD player skips less
 2005 Td5 90 XS
Steve |
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25th Nov 2013 7:35pm |
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| Johnnyb0 Member Since: 26 Jun 2013 Location: Ulster Posts: 45
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I have cooper discovery STT 285 x 75 x16 on sawtooth alloys on my 90 and run them at 30psi all round. I'm normally one up and light laden. Anything more than that the ride is a bit harsh.
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12th Dec 2013 9:35pm |
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| Ibex Member Since: 07 Dec 2012 Location: North Lincolnshire Posts: 4
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Interesting method, but you would surely need to do it when the tyres are warm after a run and they would cool down rather a lot during the test. A method that I have heard of which seems to me to be a good one is, if you are prepared to buy a temperature sensor such as is sold by Maplin, go for a drive with usual load on the vehicle to get the tyres up to temperature, then stop and take temperature readings across the width of a tyre. If hotter in centre-line than near edges then drop the pressure and vice versa. Aim to get an even temperature distribution across the width of the tyre. Richard |
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1st Apr 2014 3:45pm |
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| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3785  
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Upon pickup of our Defender, we were advised that the pressures had been set at 30F & 36R. The service guy has been doing Defenders "for ever", & he thought that these would be good for normal every day use.
Cheers, Pickles. |
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1st Apr 2014 9:10pm |
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| mick Member Since: 08 Feb 2010 Location: Yorkshire Posts: 2109  
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I put 33 psi all round in a loaded up 130 on 265/75/16
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1st Apr 2014 9:36pm |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5720 
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I do 32 psi on all, but the spare.
Andy |
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1st Apr 2014 9:45pm |
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