markyb
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posted on 29/3/11 at 08:18 PM |
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another toe in thread
I know there are plenty off guides on getting the toe in correct but came across something on the net and was looking some second opinions on whether
my thoughts are correct or absolute total nonsense
The first thing I did was to get the front wheels straight and then put a plank along the outside of each wheel with a marker on the plank a set
length from the back of the wheel (in this case 130cm)
I then measured the distance between the planks at the rear of the wheels and the distance at the 130cm marker - I came up with the following
measurements
distance at rear of wheel 172.5cm
distance at 130cm marker 169cm
I then went to this website and put the measurements in as follows
long base 172.5
side b 130
short base 169
side d 130
this then gives angle A and D as 89.23
does this mean that my toe in is 0.77 ?
[Edited on 29/3/11 by markyb]
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rodgling
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posted on 29/3/11 at 10:32 PM |
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That's the approach I used. I measured the distance between the two planks (broom handles in my case) at points 30 cm apart, then used the
difference to calculate toe. It seemed pretty repeatable, so I think it's a reasonable approach.
I found turning each end of the rack 180º changed toe by about 1/2º each side, though obviously this depends on the length of the steering arm (and
the TRE thread size).
The formula is:
d = difference between the two measurements (mm)
l = distance between points (300 mm in my case)
toe (on each side) = inverse tan(d/2l) = inverse tan (d / 600)
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