Understanding wheel alignment results
Discussion
Hi,
I am not sure these toe in / out figures are right, but they are showing as green for the machine that the car was placed on.
Is anyone able to interpret toe angles for me please as it looks like the readings switch from degrees and minutes to mm depending on what reading you're looking at?
Thanks!
I am not sure these toe in / out figures are right, but they are showing as green for the machine that the car was placed on.
Is anyone able to interpret toe angles for me please as it looks like the readings switch from degrees and minutes to mm depending on what reading you're looking at?
Thanks!
Dick,
You don’t have just ‘toe’ in those results. From top to bottom they are:
(Front Wheels)
Toe
Camber
Castor
(Rear wheels)
Toe
Camber
The machine appears not to have measured front castor, but that’s rarely adjustable anyway.
Toe is traditionally a length, the distance between the wheel rims, front and back, as that’s the way its measured. Camber is in degrees, as it was done with an adjustable set square with spirit level and protractor. That’s the reason why
The large figures in green are, I presume, the actual readings, and I judge acceptable if not identical, but I’ve no idea what the spec is for a Skoda. . You must ask the operator what the small figures in red mean!
John
You don’t have just ‘toe’ in those results. From top to bottom they are:
(Front Wheels)
Toe
Camber
Castor
(Rear wheels)
Toe
Camber
The machine appears not to have measured front castor, but that’s rarely adjustable anyway.
Toe is traditionally a length, the distance between the wheel rims, front and back, as that’s the way its measured. Camber is in degrees, as it was done with an adjustable set square with spirit level and protractor. That’s the reason why
The large figures in green are, I presume, the actual readings, and I judge acceptable if not identical, but I’ve no idea what the spec is for a Skoda. . You must ask the operator what the small figures in red mean!
John
Dick,
"10' +/- " looks odd. the " ' " symbol is for minutes of angle - there are 60 minutes in a degree. Over the diameter of a wheel, this is so small as to be almost unmeasurable, and certainly irrelevant, but +/- 10 degrees would be wildly inaccurate!
10 minutes of angle, even on both wheels, would add up to 20 minutes, or 0.3333 of a degree, more or less straight ahead. I don't believe that ether.
What does the book really say?
John
"10' +/- " looks odd. the " ' " symbol is for minutes of angle - there are 60 minutes in a degree. Over the diameter of a wheel, this is so small as to be almost unmeasurable, and certainly irrelevant, but +/- 10 degrees would be wildly inaccurate!
10 minutes of angle, even on both wheels, would add up to 20 minutes, or 0.3333 of a degree, more or less straight ahead. I don't believe that ether.
What does the book really say?
John
Edited by tapkaJohnD on Tuesday 10th January 16:47
DickP said:
Hi again,
By fluke I stumbled across a video on youtube showing the alignment equipment in use, and it displays on the computer the toe as in mm with other readings in degrees.
Is there a reliable way of converting it into degrees to compare against the book value?
Trigonometry! But you would need the wheel diameter. And A level-maths.By fluke I stumbled across a video on youtube showing the alignment equipment in use, and it displays on the computer the toe as in mm with other readings in degrees.
Is there a reliable way of converting it into degrees to compare against the book value?
Yes, trigonometry, but see: https://www.toyota-4runner.org/engines-suspension-...
It's about Toyotas but that doesn't matter, toe-in is toe-in!
JOhn
It's about Toyotas but that doesn't matter, toe-in is toe-in!
JOhn
Dick,
Yes, indeed, the book stipulates a toe in of 10 minutes of angle. I see that Superbs may have 17 or 19" wheels, so f0r the larger one that is a toe, in inches, of 0.06".
(Tangent 10 minutes = X/19 = 0.003. Therefore, X = 0.003 x 19 = 0.057")
0.06" is 1.5mm, so you could measure it, just, but then it says plus or minus 10 minutes, so you might as well set them straight ahead!
John
Yes, indeed, the book stipulates a toe in of 10 minutes of angle. I see that Superbs may have 17 or 19" wheels, so f0r the larger one that is a toe, in inches, of 0.06".
(Tangent 10 minutes = X/19 = 0.003. Therefore, X = 0.003 x 19 = 0.057")
0.06" is 1.5mm, so you could measure it, just, but then it says plus or minus 10 minutes, so you might as well set them straight ahead!
John
Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff