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Aquaplane AT3's
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Beretta
 


Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4
Aquaplane AT3's

I have a D4 with 4 x General Grabber AT3s (255/55/19) and the car seems to aquaplane really badly, but the worrying part is that its never straight. When I hit standing water on the motorway the car veers off to one side enough to make passengers worry, and heads wobble with the change in direction.

I did have it weeks ago almost put me into the barrier, and since then its not been raining as bad, but over the weekend we have had plenty of water and its just been as bad. I am not going excessively fast (55-60mph) - When I see the standing water I take foot off accelerator, I am not using cruise control, I dont touch the brakes.

Any ideas?
 2010 Disco 4 HSE
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Post #196886630th Jul 2018 7:40 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
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United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Tread depth ?

D4 mileage?

Have you had a 4 wheel alignment done in tight tolerance mode by an outfit which knows what it's doing?

NJSS
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Post #196887330th Jul 2018 8:24 am
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Moo
D3 Decade 


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Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

Tyre pressures?
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Post #196887430th Jul 2018 8:29 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

wouldn't be on the eastern section of the M60 would it ? with it's special Teflon surface.
  
Post #196887830th Jul 2018 8:34 am
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Beretta
 


Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

To answer a few questions..

D4 is on 140k, just had MOT and nothing found, no play in anything.

Tyres have been on about 4 months, and about 8kmiles, so still plenty of tread on them.

I have tried various pressures, currently running high at 40psi.

When I did have the new tyres fitted, I had a full alignment done - It wasnt a hunter, but it was in TTM. I will look at booking it into a hunter centre
 2010 Disco 4 HSE
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Post #196889130th Jul 2018 9:06 am
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Beretta
 


Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

Hardware17 wrote:
wouldn't be on the eastern section of the M60 would it ? with it's special Teflon surface.


Various roads - there was a section of the M60 where I almost went into the barrier though Censored Censored
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Post #196889230th Jul 2018 9:06 am
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ruben
D3 Decade 


Member Since: 26 Sep 2006
Location: ASTURIAS
Posts: 2378

2006 Discovery 3 TDV6 SE Manual Tonga GreenDiscovery 3

I'm not really surprised, I've never managed to have a Grabber in my life that I can say it’s a decent tire, sorry but that's my truth!!
 lost in translation!  
Post #196890230th Jul 2018 9:40 am
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JonM
 


Member Since: 24 May 2012
Location: North Yorkshire
Posts: 1235

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4
Re: Aquaplane AT3's

Beretta wrote:
When I see the standing water I take foot off accelerator,
Any ideas?


In standing water, your tyres will clear the water better if they are under power. If you reduce the power and the tyre loses contact with the tarmac it will slow down to less than the road speed and reduce the amount of water it can clear. The water will get pushed along in front of the tyre and increase lift and drag which will try to turn the car towards the side with the deepest water.

If the water is only on one side of the car, maintain power and expect a pull to the side. If the water is deep under all wheels and you lose contact with the road, reduce power very slightly to allow the car to slow down enough to sink through the water. Don't take your foot completely off the accelerator and definitely don't brake.

I've not driven on the AT3 yet, but I've only noticed aquaplaning on AT or AT2 tyres that are more than 60% worn.
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Post #196894130th Jul 2018 11:31 am
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lespes
 


Member Since: 17 Sep 2009
Location: Sitting Down
Posts: 2231

Guernsey 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Found on a RRS aquaplane probs with Grabbers AT2, just did not inspire any confidence in standing water.

Found reducing pressures that I used to run a little higher than norm made a big difference, would give that a try.
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Post #196905730th Jul 2018 5:32 pm
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RRSTDV8
 


Member Since: 07 Apr 2014
Location: Here
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United Kingdom 

I haven't had a problem with either the Grabber AT or AT3 on either of my RRS in the wet (so far!).
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Post #196907130th Jul 2018 6:01 pm
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charlietortoise
 


Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502

2010 Discovery 4 3.0 TDV6 HSE Auto Barolo BlackDiscovery 4
AT2,s

I had General Grabber AT2’s on my Disco 2 and that was as twitchy as anything in the wet. They wernt particularly good in the snow either. No where near as good as my Pirelli Scorpion M&S that I took off.
 Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂  
Post #196910130th Jul 2018 7:39 pm
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Beretta
 


Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

lespes wrote:
Found on a RRS aquaplane probs with Grabbers AT2, just did not inspire any confidence in standing water.

Found reducing pressures that I used to run a little higher than norm made a big difference, would give that a try.


I will try and drop them back to what the car suggests and see how I go.
 2010 Disco 4 HSE
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- GAP BT IID 
 
Post #196910730th Jul 2018 7:51 pm
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sailorboi
 


Member Since: 26 Oct 2012
Location: Bristol
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United Kingdom 2007 Discovery 3 TDV6 XS Auto Java BlackDiscovery 3

I run GG AT2s @ about 40/42 psi and don't have any problems in the wet at all or in the snow we had earlier this year.

I have been running them for a long time now but I am still undecided about moving over to AT3s when they need replacing. I might go for some duratracs but undecided yet.
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Post #196918030th Jul 2018 11:42 pm
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Bardley
 


Member Since: 02 May 2018
Location: Hertfordshire
Posts: 437

United Kingdom 2011 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4
Go Road Tyre..not AT?

Also used AT on a D2 and had no problems whatsoever in all conditons.
The AT3's on my D4 are absolutely fine. Surefooted, and do what's expected in all weathers for an AT tyre.

Can only suggest that new Road biased tyres may suit your driving style better, giving you maximum water clearance for the deep water crossings at speed.
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Post #196919031st Jul 2018 6:23 am
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Windy Corner
 


Member Since: 23 Feb 2009
Location: South Leicestershire
Posts: 484

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

I run 255/55R19 AT3, been on about 8 months, 15k miles, no issues at all in any standing water

I run +3 psi all round

Rik
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Post #196933431st Jul 2018 1:41 pm
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