Advertise on DISCO4.COM
Forum · Gallery · Wiki · Shop · Sponsors
DISCO4.COM > Wheels & Tyres

Legal Tyre Depth?
Post Reply  Down to end
Page 1 of 1
doleawg
 


Member Since: 30 Jul 2008
Location: UK
Posts: 768

2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3
Legal Tyre Depth?

Checked tyres last week and @ 4mm. Whats the legal min and how many miles should I get from 4mm to the legal? (If that makes sense..)
  
Post #3694225th Nov 2008 7:27 pm
View user's profile Send private message View poster's gallery Reply with quote
DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73089

Ukraine 

1.6mm ISTR although I replace them at 3mm. 2mm would do me 8000 miles.
   
Post #3694245th Nov 2008 7:29 pm
View user's profile Send private message View poster's gallery Reply with quote
CY
 


Member Since: 16 Aug 2005
Location: Warwickshire
Posts: 4506

Scotland 2008 Discovery 3 TDV6 HSE Auto Tangiers OrangeDiscovery 3

Yes 1.6mm for the 3/4 breadth of the tyre surface and around the edges. Cuts and bulges are also illegal...

Had to know that one for the Theory, did you guess Rolling Eyes
 2007 Porsche Boxster (987) 2.7
2008 Discovery 3 TDV6 HSE G4 Challenge (1 of 68)
2023 Defender 90 D250 X-Dynamic HSE 
 
Post #3694265th Nov 2008 7:32 pm
View user's profile Send private message View poster's gallery Reply with quote
Ken
  


Member Since: 20 Feb 2006
Location: Here
Posts: 10865


Its winter really should change at no less than 3mm


On the side of the tyre there are triangles that show where the wear bars are if you tread gets level with these its time to spend some money before points & fines come your way
  
Post #3694335th Nov 2008 7:39 pm
View user's profile Send private message View poster's gallery Reply with quote
tanters
 


Member Since: 24 Oct 2007
Location: Oireland
Posts: 4287

Ireland 2005 Discovery 3 TDV6 Base 5 Seat Manual Tonga GreenDiscovery 3

Dont mind fines etc


at over 2.5T you'll need every mm to stop your car. As Ken says, coming into the winter, if you dont feel confident on low thread, splash the cash and save a lot of dosh in the long run.



Thumbs Up
 A happy childhood ... is the worst possible preparation for life.  
Post #3694395th Nov 2008 7:50 pm
View user's profile Send private message View poster's gallery Reply with quote
character
 


Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781

United Kingdom 2005 Discovery 3 TDV6 S Auto Alaska WhiteDiscovery 3

just changed my front ones this last weekend when at 3mm which is the legal limit when driving in europe, at less than 3mm the stopping distance is increased by some 70% Shocked
  
Post #3695135th Nov 2008 10:12 pm
View user's profile Send private message View poster's gallery Reply with quote
90BHP
 


Member Since: 18 Oct 2006
Location: Half way along the road on the right
Posts: 3706

United Kingdom 2009 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

character wrote:
just changed my front ones this last weekend when at 3mm which is the legal limit when driving in europe, at less than 3mm the stopping distance is increased by some 70% Shocked


Maybe in the wet, but in the dry, the larger the contact area, the larger the area to apply friction / grip to the road surface. (Think F1 racing tyres). Slicks offer more grip, partly through compounds and heat but also contact patch.

Or maybe I had one too many kingfishers with that curry Whistle
 "To finish first, one first has to finish ...."  
Post #3695325th Nov 2008 10:38 pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
AJS4X4
 


Member Since: 30 Mar 2008
Location: Surrey
Posts: 3224

United Kingdom 

Nice to see most people are senesable with tread depths. Thumbs Up

I think the min tread depth is O.K'ISH for dry roads but in the wet totaly wrong and can see a change on it's way.

Think about it as well, less tread more chance of punctures, as for grip, the D3 is no F1 car, how much does it weigh ?

Most will agree with me, illegal tyres can "kill"

Makes me wild when you get the odd customer say "got my moneys worth out of them" when there are more spikes sticking out of there tyres than a hedgehogs back.

My rant is over, but tyres are very important, I can hear you say "he sells tyres", true, and undertakers sell coffins.

Not having a dig at anyone just I think talking sense.

Andy. www.ajstyres.co.uk www.ajs4x4.co.uk
  
Post #3696486th Nov 2008 7:10 am
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
paul
 


Member Since: 12 Feb 2006
Location: Midlands
Posts: 594

United Kingdom 2006 Discovery 3 TDV6 S Auto Buckingham BlueDiscovery 3

90BHP wrote:
character wrote:
just changed my front ones this last weekend when at 3mm which is the legal limit when driving in europe, at less than 3mm the stopping distance is increased by some 70% Shocked


Maybe in the wet, but in the dry, the larger the contact area, the larger the area to apply friction / grip to the road surface. (Think F1 racing tyres). Slicks offer more grip, partly through compounds and heat but also contact patch.

Or maybe I had one too many kingfishers with that curry Whistle


You would have to have 0mm of tread to get a bigger contact patch on a standard road tyre!

Regards Paul
 2006 TDV6 S Auto, Buckingham Blue, for the wife and kids.
2013 BMW 535d M sport touring. 
 
Post #37155010th Nov 2008 3:58 pm
View user's profile Send private message View poster's gallery Reply with quote
crews control
 


Member Since: 18 Mar 2007
Location: Dorset
Posts: 5011

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Waitomo GreyDiscovery 4

F1 slicks don't start getting grippy until they're around 80˚C+, and they'll only last 300km maximum!
So not really appropriate on the disco unless you can fit 325/45 R13's ? Laughing
 2005 D3 HSE
2011 D4 Landmark
2016 D4 HSE Lux
2017 Ford Tourneo VR46
Club Waitomo 
 
Post #37158410th Nov 2008 4:42 pm
View user's profile Send private message View poster's gallery Reply with quote
countrywide
 


Member Since: 16 Sep 2007
Location: UK
Posts: 6019

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Unknown ColourDiscovery 4

I would never run my tyres down to the legal limit, especially after watching one of the car programs on TV when they showed the stopping difference between decent tread and just the legal limit.
  
Post #37159610th Nov 2008 4:52 pm
View user's profile Send private message View poster's gallery Reply with quote
cmyers_uk
 


Member Since: 10 Apr 2005
Location: Near Bristol, UK
Posts: 433

2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

1st I am a firm believer in 3mm as minimum, 4mm if you want no deterioration.

Quote:
at less than 3mm the stopping distance is increased by some 70%


Id like to know the source for that test. The only official test id seen didnt get anywhere near those results but then again I suppose you didnt say how much less than 3mm.

ROSPA say 3mm is the best bet, however it is worth noting that this only refers to wet in the dry there is no difference IMHO I may not sell tyres but I thought I knew the reason a tyre had tread and it wasnt for dry grip.


In the BRMA's tests on 2 different road surfaces the difference was

Concrete
6mm to 3mm is 5metres.
80kmh with 3mm v 1.6mm is 5metres or 10m less than 6mm.

Asphalt
6 - 4mm not loss , from 4 - 3mm 2metres , from 3 - 2mm 4 metres from 2 - 1.6 3 metres.

Hence why michelin recommend 4 for winter tyres presumably as that is the first point of deterioration.

So if your driving to devon in heavy rain on the Motorway the guy with 6mm will stop 5metres before you, you will in turn stop 5 metres before the person bang on the legal limit. The only time its a problem is if the extra 5 metres he travelled contains another car! But the same could be said as you sailed past the 6mm tread guy.

So if you want to have the same stopping distance as new only let your tyres go to 4mm.

Interesting Reading

http://www.rospa.com/roadsafety/advice/mot..._depth.htm
  
Post #37231011th Nov 2008 10:07 pm
View user's profile Send private message View poster's gallery Reply with quote
caverD3
 


Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922

Australia 2012 Discovery 4 3.0 SDV6 SE Auto Fuji WhiteDiscovery 4

A lot of tyres have a small ridge between some of the threads as an indicator. Look round the tyre and you may find one. When the tread wears to the same level as the ridge it is time to replace.
 â€œThere are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games”
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System. 
 
Post #37239011th Nov 2008 11:30 pm
View user's profile Send private message View poster's gallery Post Reply
Display posts from the last:  
Post Reply Back to top
Page 1 of 1
Jump to:  
Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO4.COM Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums

DISCO4.COM is independent and not affiliated to Land Rover.
Switch to Mobile Site