the_wolf

the_wolf

Well-Known Member
I've just fitted a set of Lassa OK144 in 7.5x16. Had these on before and the tread is excellent in all road conditions and never had a problem with them. However just out of curiosity I looked to see if I could find reviews on them and apart from discovering that the Turkish military fit them to their Land Rovers I also found out that they have a directional tread. To be honest I'd never heard of this before but its pretty self explanatory as to what it is. My question is that if the tyres haven't been fitted to the wheels with the tread facing the correct way what kind of effect could this have on day to day driving?
 
directional tyres are designed to clear water away from the contact area so if they are running the wrong way they will generally pull the water under the tyre instead and can lead to aquaplaning so if the tyre has a direction of rotation it needs to be adhered to. I have also heard of direction 4x4 tyres being purposely used against the direction of rotation with the idea that instead of clearing the dirt away and making the vehicle sink they pull the dirt under the vehicle and the weight of the vehicle then compacts the surface and they tyres then have something to grip.
the main difference here is the speed the tyres are used and the surface of the 'road'.


of course there is always the possibility that the tyres will just get dizzy if they are used the wrong way round :D

hope I have helped
 
haven't heard of that one but then I work with 4 wheels

the other thing i forgot to say about was that if the tread is not obviously direction i.e. >>>>>> over the tyre and there is inside and outside marked on the sidewalls then this needs to be followed as the tyre has been made to deal with being used that way round.

having a tyre fitted the wrong way is also an mot fail
 
Last edited:
There was directional arrows on my last ones of the same type but not on these. They do have an arrow like tread though so I assume this is to face forwards? A couple of them are the wrong way so ill have to get these swapped around. Can't find a pic on my phone of the tread but if you look up Lassa OK/144 7.5x16 you should be able to see. Any help is much appreciated and ill get these chucked into a tyre place today to get swapped around
 
Another thought on the wrong direction fitting of tyres, if they give better traction going forward when you get stuck you will be stuck. If fitted the wrong way then you should have a better chance to reverse to get yourself free.
On a 6 wheel argocat we had 4 of the 6 the wrong way for this reason. When you get an argocat stuck you are usually well away from any recovery.
But to note any tyre incorrectly fitted either back to front or inside out will not perform as the manufacturer intended and should not be used on the road. The only exception I can see is a rotational spare tyre when only one spare is available, and then only for short term use.
 
Gentlemen this is the tread. I know its probably common sense but just to clarify before I stick it in the shop I assume that the arrow pattern would be intended to be traveling forwards?
 

Attachments

  • uploadfromtaptalk1392983642740.jpg
    uploadfromtaptalk1392983642740.jpg
    159.1 KB · Views: 230
Easiest way to remember, if you look at a tractor from behind the v is pointing downwards. Hope this helps.
 
So the wheel above would indicate it being a rear left wheel travelling forwards then? I'd have thought that the arrows would travel forward which would mean the V would be upside down from behind
 
the direction arrow on the side wall should face forwards.
before putting it in a tyre shop have a look and see if swapping wheels about (left to right) might sort the problem. It'll save you some cash if you get a ripoff garage that may charge you and say they have switched the tyres when all they have done is to move the wheels about.

auf_wiedersehen_pet the arrows on the floor should actually point to the back of the vehicle so where it has traveled from its the arrows of the tread on the top of the tread that should point forwards
 
I'll know if they swap them or not, plus there's a very good tyre garage near my work. They use a torque bar and everything, don't just blast them on with an air gun. As I said my last set of Lassa had direction arrows on the side wall but these don't. So do you reckon that the arrow pattern on the tread (as pictured earlier) should be travelling forward then?
 
jacksta said:
Easiest way to remember, if you look at a tractor from behind the v is pointing downwards. Hope this helps.
Click to expand...

No it doesn't, it points upwards when viewed from behind.
V points forwards from top and thus rearwards on the contact patch.
This means any mud is pushed out from the centre of the tyre giving purchase on more solid ground underneath.

the other way round would tend to trap the slippy under the tyre decreasing grip.
 
You must log in or register to reply here.

Similar threads

SR4x4
For Sale Land Rover 19 inch Alloys - PCD 5/120 - £80
Replies
0
Views
1K
SR4x4
SR4x4
Sierra Charlie
Help required please with query about HDC button
Replies
7
Views
791
Sierra Charlie
Sierra Charlie
R
Lashing rings
Replies
2
Views
388
rubix101
R
J
Discovery II - Tyre Comparison
2
Replies
23
Views
3K
Jayridium
J
K
Help - 4WD issue !!
Replies
7
Views
729
Nodge68
Nodge68