 | Home > Wheels & Tyres > Tyre pressure? |
 
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| CFB Member Since: 13 Sep 2007 Location: Bradford, West Yorkshire Posts: 803  
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With all the different tyre sizes people fit to Defenders, the pressure is always hard to benchmark. I run my 265/75/16's at 32 front and 38 rear and it seems to work well for me. There was no reference for this, i just tried it and it seems right. Andy
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19th Apr 2010 7:32am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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On standard Grabbers on Boost Wheels these pressures are printed in the Owners Manual. Worked for me too!   If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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19th Apr 2010 9:40am |
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| CFB Member Since: 13 Sep 2007 Location: Bradford, West Yorkshire Posts: 803
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That was a lucky guess then
 Andy |
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19th Apr 2010 9:55am |
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| harveyg77 Member Since: 09 Apr 2010 Location: Derby Posts: 309
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I have the 235/85r18 Grabber TRs on Boost alloys fitted to a 110 utilitywagon.
The manual states 30PSi front and 48PSi rear. This seemed ok for the front but hugely over ambitious for the rear. the fronts are softish looking, i.e. the sidewall bulges a little on contact with the ground, whilst the rears don;t seem to at all. Logic would dictate that maybe the fronts need more pressure, whilst the rears are over inflated. Are you guys saying that 32PSi front and 35-40PSi rear is a better combination? Thanks, harvey |
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19th Apr 2010 11:38am |
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| CFB Member Since: 13 Sep 2007 Location: Bradford, West Yorkshire Posts: 803
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48 for the rears seems way too much unless fully laden or towing heavily, mine has a box of off-road kit in the back (not that heavy) and occasionally 2 passengers and 38 seems fine Andy
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19th Apr 2010 11:51am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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You sure you haven't got your threes and fours mixed up? Haven't got it to hand but my manual states 30 front 38 rear! Ran those pressures for 16 months prior to wheel/tyre replacement combo no problems at all. If what you are stating is correct it is a misprint, get LR to provide you with a new set of rear boots, 'pound to a pinch' if you've been running with those pressures for any length of time you got wear issues????? If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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19th Apr 2010 12:05pm |
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| Cannonball Member Since: 19 Jun 2009 Location: Co Laois Posts: 150  
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Yeah, manual states 30/48. Did experiment a few times and settled on 28/38 with generally driver only and no load in the rear. Seems to work fine with no uneven wear or handling issues.
On a related topic all tyre manufacturers recommend checking tyres when "cold". Often wondered what this actually means because ambient temperature could be from below 0deg C to 10deg in the winter whereas it could be from 10deg C to 25deg C in the summer! |
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19th Apr 2010 1:36pm |
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| Eduardo Member Since: 28 Aug 2008 Location: Región Metropolitana Posts: 2110  
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I use 30 in the rear and 40 in the back without load.
With 48 the truck gets quite bumpy. Cheers Eduardo MY 2007 110 SW PUMA 2.4: Big Fog of 64' MY 1994 Jayco 1207 Folding camper: "El Tremendo"  Click image to enlarge |
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19th Apr 2010 1:53pm |
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| heinrichnel Member Since: 07 Apr 2010 Location: Windhoek, Namibia Posts: 42 
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I have 235/85 Goodrigde AT and are running 200kPa in the front and 230kPa in the back, no problem. Much softer ride too!
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19th Apr 2010 2:49pm |
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| harveyg77 Member Since: 09 Apr 2010 Location: Derby Posts: 309
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Mine is a 110, the manual states 30PSi front for normal conditions/towing/max gross load. 48PSi rear normal conditions and 65PSi rear for towing/max gross.
Ride is quite hard/choppy, so maybe dropping the rears to 38PSi might be beneficial. The manual does state 30 front and 38 rear for the 90. Harvey |
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19th Apr 2010 4:46pm |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5038 
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Out of the book:
Tyres Front: 30psi (2.1 bar) Rear: 38psi (2.6 bar) Wheel Nut Torque: 133Nm (98lb-ft) Mike |
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19th Apr 2010 10:33pm |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2424 
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F&R:32psi for the city (yes, we have paved roads)
Long distances: F: 34ish, R:38ish (4 people+250 kg) Puma 110" SW ............................................................. Earth first. Other planets later |
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19th Apr 2010 11:43pm |
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| austen Member Since: 10 Mar 2008 Location: Sydney Posts: 52 
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I wonder why LR specify such a low pressure for the front? I run 38/42, but the dealer always adjust to 42PSI all round!
Austen. Rover 12 1935 Rover 20 1940 Rover 100 1960 Defender TDC1 2008 FL2 TD4 2008 |
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20th Apr 2010 6:19am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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I always thought it was to take into account shift in weight and moment in certain conditions of the vehicle (for example heavy braking). Also the fact you have the weight of the engine at the front???? If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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20th Apr 2010 7:31am |
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