Member Since: 11 Dec 2018
Location: Liverpool
Posts: 8
What am I doing wrong?
HI
Ive been off roading twice now as a noobie in my disco 3...and both times ive got flat tyres...
first when doing Sarn helen in south wales on the way down (cost me 2 new tryes) and yesterday while in the lakes coming down from the Parkor Moor route coniston. got 2 flat tyres all were sidewall damage
My wheels and tyres are Genaral Grabber AT 255 55 19 XL and they are run at the standard pressure 33psi on the front and 36 back.
Ive heard that 19inch is to big a rim for off roading, of maybe my tyre pressure is to high?
What do peeps recommend, do i need smaller rims of diffent tyres as am at a loss?
many thanks
8th Sep 2019 12:23 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
I run 17s on mine when green laning. The last time I was out off the beaten track on my 20s I shredded a sidewall.
Back to the 17s since then
8th Sep 2019 6:27 pm
iceclimber
Member Since: 11 Dec 2018
Location: Liverpool
Posts: 8
What 17s are you using and what tires?
8th Sep 2019 8:05 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23824
The GG AT’s were notorious for being vulnerable to damage on Salisbury Plain.
My own theory, based on nothing remotely scientific or factual, is that they don’t cope well with the weight of the D3/4.2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography (now semi-retired)
Last edited by LT on 8th Sep 2019 8:35 pm. Edited 1 time in total
8th Sep 2019 8:10 pm
ronp
Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15263
Why has it got to be the size of the wheels, or the tyres.
They don't do anything on their own.
First thing I'd check is the nut at the steering wheel.
I watched a video of some guy in a D3 on 20” wheels, following other vehicles on an off road section, state that he was over-inflating the tyres to protect the more vulnerable side wall. BS or not, you decide?
8th Sep 2019 9:58 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26774
The lower profile sidewall of 19,20, etc does make them more prone to damage. There is simply less rubber between the tread and the rim to absorb impact.
I have done loads of rough driving in both my D3’s and my current D4. I personally have never had a puncture whist off tarmac, but have witnessed plenty who have. My D3 was on 17” but my 4 has been on 20” all the time.
The only advice I can offer is to drive over rocks rather than around them where possible, to place the load in the centre of the tread. Read the track to enable you to do this, and go as slowly as you need, to be able to read the track!
Also, when going around corners, take a wide line to keep the rear tyres from catching on embedded rocks in the apex of the bend.
A bit of luck helps too!
8th Sep 2019 10:08 pm
iceclimber
Member Since: 11 Dec 2018
Location: Liverpool
Posts: 8
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