Do MTRs have to be aired down to work good in sand? There was a sandy grassy hill I tried getting up when I had the mtrs on and couldnt get up it for the life of me. I'm back on my street tires because I've been logging alot of miles lately and tried it again just to see the diffrence and I walked right up it on the 2nd try. I was using the same line and approch speed.
Thoughts?Sceen name use to be "wantsanlr3"
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26th Oct 2009 3:44 pm
DiscoDunc
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had you switched off DSC Duncan
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Yes both times. I do know this could of just been pure luck I made it up the second time.Sceen name use to be "wantsanlr3"
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26th Oct 2009 3:50 pm
DSL Keeper of the wheelie bin
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Just done Tunisia trip on 17" road tyres, performed in Saharan sand. TFC had MTRs on and was getting stuck regularly but he was pathfinding and driving a manual!! Both tyres aired up & down as sand conditions required. Horses for courses, both types did well.
26th Oct 2009 4:25 pm
MARKW
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I had MTR's on for my trip to the Sahara earlier this year. I was 3rd or 4th in the convoy. So driving over broken trail sand. Regularily got stuck. Even to the point of getting well pi ed off with it. But in the Atlas it was a joy to driveHONI SOIT QUI MAL Y PENSE
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26th Oct 2009 4:34 pm
Stu
Member Since: 08 Feb 2009
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I've certainly gone up some hills on pay and play sites with my road tyres where MTR's haven't been able to get up.
What are the all terrains like in Sand?D3 HSE MY05 Auto
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26th Oct 2009 4:55 pm
DSL Keeper of the wheelie bin
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Not specifically in sand but the AT2s were having one hellova bad time with punctures. ATRs and MTRs (on one car for each type) had none. My 17" Contis had one.
26th Oct 2009 5:13 pm
CFB
Member Since: 02 Dec 2005
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I always thought MTR's were too aggressive for sand and caused the wheels to dig in? Also agree about AT2's, the side walls are just too soft for any serious off-road use (IMO)2020 BMW X1 18d XDrive X-Line Auto
26th Oct 2009 5:17 pm
mattgreen
Member Since: 15 Sep 2009
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DSL wrote:
Just done Tunisia trip on 17" road tyres, performed in Saharan sand.
I'd be interested to know which tyres you were using - sounds like they did well.
26th Oct 2009 6:33 pm
DSL Keeper of the wheelie bin
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Conti 4x4 Contacts. Only got stuck twice, 1st time following TFC over some big dunes, up the steeper lee side TFC pulled me out. 2nd time over small hump when brain was switched off Ran at 20/25psi front/rear in sand but went as low as 15/20 after got a bit bogged down after fecovering TFC on 2nd day. The cry of "Spicy Meataballs" went up dropped pressures and dug myself out.
Was very please with the Contis, picked up 1 puncture but these were well offroad abused tyres, tough as old boots and certainly tougher than AT2s.
26th Oct 2009 7:55 pm
10forcash
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CFB wrote:
I always thought MTR's were too aggressive for sand and caused the wheels to dig in?
not too aggressive but the tread pattern does cause greater breakup of the surface, not so much a problem for the vehicles with MT/R's on but can be a problem for following vehicles if they have to use the same wheel tracks, dropping the pressures helps (I was running at 15 front, 20 rear whilst all but NJF were at 20/25) but that also increases the risk of dismounting a tyre and overheating the sidewalls. Reasons behind running MT/R's were 1. not all the terrain was 'clean' sand, 2. being lead vehicle, if there were hidden rocks etc. i'd be hitting them first so a stronger tyre should hopefully reduce any damage. Obviously i'd try and warn the following vehicles of the obstacle to prevent them damaging tyres. 3. I already had two spare MT/R's, all six tyres were moderately worn so if I lost one or two it wouldn't be as galling as near-new AT/R's
It's worth noting that all the punctures suffered were as a consequence of driving through desert scrub, at times it was quite dense and the avoidance of punctures was just as much due to luck as judgement and getting the right line, no punctures were suffered as a consequence of hitting stones or other debris.
I ran MT/R's on both Morocco challenge events, in a mixed terrain environment it pays to use a tyre suited to the harshest driving surface even if this compromises the driving on other terrains
Last edited by 10forcash on 26th Oct 2009 8:11 pm. Edited 1 time in total
26th Oct 2009 8:08 pm
DSL Keeper of the wheelie bin
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To think we were there 2 weeks ago!!
26th Oct 2009 8:11 pm
10forcash
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I know seems much longer
26th Oct 2009 8:13 pm
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26th Oct 2009 8:15 pm
Rescue01
Member Since: 14 Jan 2008
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two trips to tunisia just under 8000 miles on ATRs and no punctures,but the sidewalls do take a hammering Its not the height of the fall but the sudden stop at the bottom that hurts!!
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in Saharan sand. TFC had MTRs on and was getting stuck regularly but he was pathfinding and driving a manual!! 
Both tyres aired up & down as sand conditions required. Horses for courses, both types did well.
ed off with it. But in the Atlas it was a joy to drive
2nd time over small hump when brain was switched off 
Ran at 20/25psi front/rear in sand but went as low as 15/20 after got a bit bogged down after fecovering TFC on 2nd day. The cry of "Spicy Meataballs" went up dropped pressures and dug myself out. 
