Welcome aboard. Judging on some of today’s comments around today’s forum, I think the knife draw was pretty full.
I had a similar problem with grip, C ped myself 1st time it happened on the rather wonderfully wet M62!
After various searches (& helpful [u]abuse[/u], help)etc, I did get a lot of helpful advice, & think I may well go with the AT2’s.
Luckily, or not, I have checked & still got 5mm left, so time to start saving.
PhilThe music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs. There's also a negative side.
4th Sep 2009 12:52 pm
zaphod
Member Since: 18 Sep 2007
Location: Magrathea
Posts: 357
I'm on 19"Wranglers which are needing replaced and the aquaplaning is now quite noticeable. Never had an issue when the tyres had good tread left. Mine are close to the wear indicators, so I think that's the reason. Sail Fast - Live Slow...
Member Since: 15 Feb 2006
Location: The Magic Roundabout
Posts: 1392
In my experience the D3’s & RRS’s have exhibited these characteristics right from the get go, with original factory fit tyres, as new as could be.
18†rims on the D3’s & with 18’s 19’s & 20’s on the RRS’s.
4th Sep 2009 1:59 pm
drpepper
Member Since: 25 Aug 2009
Location: Preston, Lancashire
Posts: 252
Yep, Noticed it on my 08 reg too on the standard factory fit 19's, it has done 28k though on those tyres and they are wearing down and due replacing next month I reckon (service, brakes and spots this month so they'll have to last, lol). I'll be looking for a decent sort of intermediate tyre, good on road but capable off road too, have to see what MTR's come in at price wise.
Crappy little cars go best for puddles as narrow wheels just cut through like a knife, rather than the wider profiles which are more like a knife on it's side, something to do with water displacement i believe.....Errr, ummm, maybe...oh bo**ocks, just do it !
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4th Sep 2009 10:34 pm
Disco3newbie
Member Since: 26 Oct 2008
Location: Scottish Borders
Posts: 600
Just to add my 2penorth....08 XS on 18" Wranglers...plenty of tread left and pressures at 33psi front and 36 psi rear. Noticed "water wobble" during heavy rain/surface water earlier in year when travelling at 'normal' road speeds and hitting the odd puddle. Thought it was just me but never had any problems with old D1's on Pirelli Scorpions.
Just back from 2 weeks in north west Scotland (all the midges drowned!!) and have to admit that the sensation of aqauplaning was very evident so I drove a little more cautiously and suggested to SWMBO that a set of spare rims with ATR's may be worthwhile
Have to admit a bit surprised that 2.7tonnes of metal gets the water wobble so easily but suspect it may be factory fit tyres but at least the front end gets a wash every time you hit a puddle.
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4th Sep 2009 11:11 pm
Shrinky
Member Since: 05 Jul 2007
Location: Cotswolds
Posts: 2515
A friend of mine drove my car and couldn't believe how it drove in the wet His Audi A3 is terrible and it has 4 wheel drive Global Warming.... I'm luvvin it
4th Sep 2009 11:17 pm
Landylad
Member Since: 23 Dec 2008
Location: Aberdeenshire
Posts: 366
Glad it's not just me then...... Major aquaplaning on my 18" Wranglers at the mo. Fair enough, they are near then end of their life, so it's just as well I'm trading it in If in doot, flat oot!!
4th Sep 2009 11:18 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50934
Aquaplaning is a fairly exacting science in so much as it occurs when a tyre cannot dissipate water on the road surface quickly enough and the vehicle begins to ride on a layer of water. There will come a point with any vehicle and any tyre when if you are traveling fast enough you may aquaplane ...some reports suggest that the threshold speed is as little as 45mph.
A best buddy of mine for over 15 years was killed in an aquaplaning accident on the M4 near Bridgend nearly 10 years ago. His vehicle was overtaking a truck in poor weather when he aquaplaned and lost steering control, hit a roadside sign and burst into flames. Neither he nor his passenger got out.
Whatever your tyres ...just back it off a bit in poor weather 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
Last edited by DG on 5th Sep 2009 12:09 am. Edited 1 time in total
4th Sep 2009 11:29 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26704
Very good advice DG, laws of physics apply even to Discovery 3
You should try a Mini Cooper S on worn tyres, now thats aquaplaning. Its scary.
4th Sep 2009 11:36 pm
simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
The other thing to remember about speed and water and weight...
Fill a large bowl or bath with water.
Now make a fist and slowly push your hand into the water... easy is it not ?
Now punch the water as hard as you can... mmm depending on how hard to punched... it was a lot harder wasn't it ?
Now do the same with your hand flat... even more difference and it probably hurt if you really slapped it
Now imagine your the tyre of your D3 hitting a deepish puddle at the edge of the road and traveling at 5 MPH... hmmm no effect at all, easy peasy.
Now imagine speeding up to 60 MPH - ouch, I felt that... so did the suspension and the whole chassis.
Remember doing belly flops ?? Compared with lowering yourself slowly into the pool.
It ain't rocket science, the faster you go the harder the water gets - its called compression (I think) and all liquids display the same properties.
Just because your D3 weighs 2,700 KG's doesn't mean it will not be affected by speed and hitting a liquid.
5th Sep 2009 12:04 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26704
good analogy.
Looking at it from a purely mechanical point of view, Water is a liquid, and has a mass. In order to move a mass you have to overcome its static inertia. The more water in front of the tyre, the more energy will be required to overcome the tendency of the water to stay where it is.
A good tyre with unworn well designed tread will break the water up into smaller volumes and disperse it more efficiently. A slick tyre will need to disperse all the water immediately to keep in contact with the road.
Like slapping the water with fingers together will hurt more than slapping it with your fingers apart.
I got O level Physics
5th Sep 2009 12:15 am
Zermatt Vulgaris
Member Since: 12 Jan 2009
Location: aberdeenshire
Posts: 511
Go on wikipedia and search aquaplanning..in the references there is a paper written by NASA..Langley Research centre 1963....pretty much covers it with equations..
basically they had concerns about big aeroplanes aquaplanning and they weigh more than 2.7 tons.Visiting from rrsport.co.uk
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5th Sep 2009 12:24 am
sideview
Member Since: 02 Dec 2006
Location: in the valley
Posts: 1663
I think what it all comes down to is that stock D3 tires aren't all that great I'm not so good at giving advice...may I offer you a sarcastic comment instead?
Member Since: 17 Nov 2005
Location: Glawstershire
Posts: 539
Having owned D3's for 5 years now I can aonly agree with the serial tyre swappers!
Standard tyres can be hairy, as they are not biased to any particular environment.
MTR's will displace water due to the monstrous gaps in between the blocks.
My favourite tyre in the wet, and I would like to think that I have a fair amount of experience of driving them in the wet (2500 miles accross Europe in abysmal conditions in 10 days to start with) is the Vredestein Wintrac 4 Extreme. Very stable at speed, fantastic grip at lower temps and in snow and ice, and due to the large amount of sipes in the tyre the water displacement is amazing.
AndrewS did a fair amount of google research into winter tyres a while back and that thread is well worth reading.
DG hits the nail on the head though, common sense should prevail.
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Also all things being equal, higher tyre pressures will increase the speed at which hydroplaning commences. Something about hydroplaning speed being proportional to the square root of the tyre pressure (memory of some equations of 30 yrs ago ). Here is sandy Western Oz, we apply this principle in reverse and lower tyre pressure to float on sand (ie, hydroplane on sand).Jim Dowell - D4 HSE TDi, 12,000 hydraulic winch & hidden winch mount, MTRs, TyreDog, Traxide 2 x aux battery system, fixed air compressor, Dolium roof rack, MitchHitch.
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ped myself 1st time it happened on the rather wonderfully wet M62!
His Audi A3 is terrible and it has 4 wheel drive 
