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Author: Subject: Toe, how low can you go?
smart51

posted on 23/12/14 at 03:57 PM Reply With Quote
Toe, how low can you go?

I've been playing round with the front toe setting on my trike and I've found a bit of toe out is more stable than toe in or paralell front wheels. I've tried having the rear of the wheels 4mm closer together than the front, then 6mm. I'm thinking of trying more but don't know how far is safe to go. How much toe in is "normal"?

[Edited on 23-12-2014 by smart51]

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Sam_68

posted on 23/12/14 at 05:30 PM Reply With Quote
How quickly do you want the shoulders of your tyres to wear?

More than about 1/8" ( about 3mm.) will start having a noticeable effect on tyre wear, for road use, and shouldn't really be necessary if everything else is working properly.

If you need more than 1/4" (about 6.5mm) you've got a very serious problem somewhere.



Edited to add: What you're describing, incidentally (wheels closer together at the front than at the rear) is toe IN, not toe OUT.

[Edited on 23/12/14 by Sam_68]

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minitici

posted on 23/12/14 at 05:36 PM Reply With Quote
If the front of the wheels are closer together than the rear of the wheels, then you have toe-in not toe-out.

6mm total toe is a fair amount -
3 to 4mm total toe should be OK in most circumstances.

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smart51

posted on 23/12/14 at 06:07 PM Reply With Quote
quote:
Originally posted by minitici
If the front of the wheels are closer together than the rear of the wheels, then you have toe-in not toe-out.

6mm total toe is a fair amount -
3 to 4mm total toe should be OK in most circumstances.


Well spotted. I've corrected the original post.

If 3 or 4mm is normal, I won't add any more. As for tyre wear, the trike weighs less than 1/4 tonne. The tyres will turn to stone before they wear out.

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Mr Whippy

posted on 23/12/14 at 06:27 PM Reply With Quote
I could be wrong but I thought the whole point of toe in is that when the vehicle is in motion the drag on the suspension then pulls the wheels back into correct straight ahead alignment and is more for accommodating the compliance in the bushes etc?
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smart51

posted on 23/12/14 at 07:06 PM Reply With Quote
quote:
Originally posted by Mr Whippy
I could be wrong but I thought the whole point of toe in is that when the vehicle is in motion the drag on the suspension then pulls the wheels back into correct straight ahead alignment and is more for accommodating the compliance in the bushes etc?


I'm sure that's a big reason. Others I've googled include changing how quickly your car turns in and adjusting under steer / oversteer in different parts of a turn.

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Mr Whippy

posted on 24/12/14 at 07:19 AM Reply With Quote
quote:
Originally posted by smart51
quote:
Originally posted by Mr Whippy
I could be wrong but I thought the whole point of toe in is that when the vehicle is in motion the drag on the suspension then pulls the wheels back into correct straight ahead alignment and is more for accommodating the compliance in the bushes etc?


I'm sure that's a big reason. Others I've googled include changing how quickly your car turns in and adjusting under steer / oversteer in different parts of a turn.


yeah your right there as well, this is how I use to set it on my JBA falcon, basically I'd go to a local large carpark in the rain and do big power slides then adjust the toe in till the car drifted totally neutral so I knew it wasn't going to bite me if it skidded round a corner, however it wasn't a remotely scientific method though the tyre wear was good. That car was cortina based and had notoriously huge amounts of bush compliance.

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