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300TDi CSW Phil



Member Since: 03 Apr 2016
Location: Bracknell
Posts: 748

United Kingdom 1995 Defender 110 300 Tdi CSW Epsom Green
300tdi CSW Tyre Pressures
I have finally swapped my Cooper Discoverer ST Maxx in 235/85 r16 with some Falken Wildpeak AT3WA in the same size.

The vehicle has uprated suspension as the original died and it used to carry quite a lot of kit.

It now carries a winch and winch bumper on the front and a Cargobear roof rack and howling moon roof tent at the back pretty much constantly.

The tyre company inflated them all to 30psi which looks a little soft to my eyes (without the rack and tent on at the moment as about to sort the alpine light seals out).

I used to run the Coopers at 36psi most of the time, it seemed to be a reasonable balance of comfort and efficiency (if such a thing exists after strapping another housebrick to the original design).

Would it be a good starting point with the new Falkens once the rack and tent are back on or can someone give me a better suggestion? 1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS
Post #1039145 4th Jul 2024 4:21pm
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Chicken Drumstick



Member Since: 17 Aug 2020
Location: Near MK
Posts: 624

United Kingdom 
30 is an ok starting point. Tbh anywhere from 26-40 can work. I normally run 28psi all round. But lots of folks on forums run way higher for some reason.

You can also balance out the handling by messing about having softer front or rear depending on your tastes and driving styles. If hauling/towing you’ll want more air in the rears than the front normally, unless you are running high pressures all round.
Post #1039148 4th Jul 2024 4:59pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19838

United Kingdom 
I run 34F - 36R on a 90, but this is on 255/85/R16.

As yours is a 110. 34F & 38R might be best.

Figures in PSi. Diesel$ Live$ Matter. ⛽️🛢️👨‍🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧


Last edited by custom90 on 4th Jul 2024 9:27pm. Edited 1 time in total
Post #1039150 4th Jul 2024 6:14pm
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 4064

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
What are the factory pressures? On my Puma 110 they are 30/48. For road use I'd start with the factory setting and maybe go up a bit for the extra weight. There's a reason why those figures were arrived at and may not be until you are in an emergency situation the reason comes to light. It's not just about ride comfort or economy, it may be to prevent a rollover in a sudden swerve, or preventing overheating on a long run etc. 2007 110 TDCi Station Wagon XS
Post #1039165 4th Jul 2024 8:10pm
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300TDi CSW Phil



Member Since: 03 Apr 2016
Location: Bracknell
Posts: 748

United Kingdom 1995 Defender 110 300 Tdi CSW Epsom Green
As far as I can work out there were never factory settings for a 300tdi shod with 238/85 r16's as they weren't a factory option at the time.

The closest I can get is the Haynes Workshop manual if I can remember where I put it. I also don't have a little sticker anywhere with tyre pressures listed. 1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS
Post #1039178 5th Jul 2024 8:20am
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rusty_wingnut



Member Since: 24 Mar 2011
Location: UK
Posts: 91

They were an option, at least for 110" models....

I run mine at 32F and 36R
Post #1039181 5th Jul 2024 8:33am
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Andrew95



Member Since: 27 Jul 2022
Location: Midlands
Posts: 64

United Kingdom 1997 Defender 110 300 Tdi SW Corris Grey
Anywhere between 28 and 40 seems to be average! I am not sure if there is official guidance on what they should be?

Personally with 285/75/r16 I run 40 all round (camper conversion so not the lightest) when on the road. When green laning in the UK I normally drop them down to 35'ish and that works.

I have just come back from the Pyrenees and it was almost entirely off road - dry, bumpy tracks, lots of stones etc. I dropped them down to 28 front and 30 rear and that worked well, although it sapped a lot of power when back on the road.
Post #1039191 5th Jul 2024 10:46am
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