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Thread: Toe In, Toe Out, that is the Question.

  1. #1
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    Toe In, Toe Out, that is the Question.

    I have 33x12.5x15" tyres (Mud) fitted to my 94 Disco and I was wondering what the Toe in or Toe out should be, I know what the LR Factory W/Shop Manual says, i.e. 2mm Toe Out.
    Does anyone have any experience with this subject, I'm heading up to JDNSW's place for the AULRO 10th and have over a 1000klms to cover on tarmac.
    Is there an accepted Toe in or toe out for wider wheels and is it different to standard wheels, Regards Frank.

  2. #2
    Tombie Guest
    How lifted is the vehicle?

    If its lifted bringing in the toe just a little seems to settle them.

  3. #3
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    I'd run that size tyre at 0/straight ahead Frank.

    I run my 255/85's @ 2mm out, but you have a bigger/wider contact patch with a shorter wheelbase and I'd reckon it'd wander like a mongrel at 2mm out, although the theory is that with the steering axle also driving it tends to pull the front wheels straight, unlike a non-drive steer axle that'll try and plough.

    I've run insane amounts of toe out on the track, (rear drive) but that's a whole different kettle of fish trying to optimise turn in on tight corners, I wouldn't do it on a road vehicle.

  4. #4
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    Quote Originally Posted by Tombie View Post
    How lifted is the vehicle?

    If its lifted bringing in the toe just a little seems to settle them.
    How much did you used to run on your 'fender Mike as you had a fair bit of tyre as well as a fair old offset ?

  5. #5
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    It's lifted 2" all round, I've just replaced the 2 tie rod ends on the front drag link, the rear track rod was done recently and adjusted the swivel preload both sides, These tyres have over 11" of tread contact, so I figured straight ahead should be right.
    It doesn't wander but at speed the front wheels get up a bit of a shimmy, the swivel adjustment and new tie rod ends should help.
    What's the consensus on 1mm toe out?? Thanks all, Regards frank.

  6. #6
    Tombie Guest
    Quote Originally Posted by rick130

    How much did you used to run on your 'fender Mike as you had a fair bit of tyre as well as a fair old offset ?
    Mine was wound in 2 degrees.

  7. #7
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    Tombie, how was the tyre wear, did you get any shimmy or excessive noise, Regards Frank.

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    From my technical book titled 'New directions in suspension design' by Colin Campbell.
    A system that has the tie rod/trackrod in front of the axle should have toe in, wheras one that has the tie rod behind the axle should have toe out. the principal being that a spinning wheel will pull straight ahead to the direction of travel,and toe in/out is used to preload the ball joints and to place the tie rod in tension not compression, because the reverse would make the weak arse Rover tie rod flap about like a very flappy thing.
    Wagoo.

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    I've heard the fwd/4wd vehicles should all run toe-out before. But I've found nothing but awful tyre wear (chews the inside corners off), vague feeling corner-corner and wandering with toe-out.

    I run 1mm toe in on my fwd/4wd japanese cars and I also run 1mm toe-in on my rangie. It was wandering averagely bad until last weekend where I found it was running zero toe. Now back to 1mm in and feeling right.

    Worst wandering it's ever had was 4mm toe-in.

  10. #10
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    JDNSW is online now RoverLord Silver Subscriber
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    Quote Originally Posted by wagoo View Post
    From my technical book titled 'New directions in suspension design' by Colin Campbell.
    A system that has the tie rod/trackrod in front of the axle should have toe in, wheras one that has the tie rod behind the axle should have toe out. the principal being that a spinning wheel will pull straight ahead to the direction of travel,and toe in/out is used to preload the ball joints and to place the tie rod in tension not compression, because the reverse would make the weak arse Rover tie rod flap about like a very flappy thing.
    Wagoo.
    Not quite that simple - it depends mainly on the camber of the front wheels (from memory this is zero for coil spring Landrovers (at least it is if the axle housing is straight and the swivels have no free play) and 1.5 degrees for Series, which is why they need toein), and there are all sorts of compromises when the geometry changes with suspension deflection - more a problem with independent suspension, but remember that the castor angle changes with suspension deflection with a single radius arm.

    John
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

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