1. Measuring Camber

Is there an easy way to measure camber? I'm in an old GPV Comp where I can adjust the camber by inserting washers behind the axle plate.

If I measure the inside distance between the top of the wheels and the bottom, combined with the height at the top to get a sort of trapezoid, is there an easy formula for that? Or should I take a picture from behind and measure it in photoshop?

2. Measure the distances, and use trigonometry to calculate camber.
Attachment 44561

c = arctan B'/(D/2)
for small cambers (~6 degrees and less), c = ~arctan B/(D/2)

for larger cambers (e.g., sports), the difference between B and B' introduces a significant error, but B' is hard to measure (or more trig formulas are required for accuracy).

example:
given wheel diameter (D) = 24" and B = 3/4"
camber = arctan 2*0.75/24 = ~ 3.5 degrees

3. Or for \$10 you can buy an inclinometer at the hardware stop.

4. 1. I had to take Algebra twice so trig to me is like watching Shakespeare in Klingon.
2. I'm a cheap bastard.

Thanks for the suggestions, though. I'll see what I can get to this weekend.

PS: how do I measure wheel radius while compensating for the flange created by the hub? Maybe I can find an ETRO measurement chart somewhere....

5. Originally Posted by brian
. . . like watching Shakespeare in Klingon.
lol - fabulous visualization My wife chuckled, too ! (She is a fan of both Shakespeare and StarTrek.)

Originally Posted by brian
PS: how do I measure wheel radius while compensating for the flange created by the hub? Maybe I can find an ETRO measurement chart somewhere....
I don't think the error introduced by the flange will be significant. measure from the center of the axle to the edge of the tire. (Have I understood you correctly?)

6. I think the washers on the gpv give 1.5 -2.0 degree camber each one

7. Originally Posted by chasmengr
Have I understood you correctly?
Yes, thanks.

Originally Posted by rolling01au
I think the washers on the gpv give 1.5 -2.0 degree camber each one
That's a 25% margin of error, yo. That's huge if I have 5-7 washers.
Also, believe it or not, the washers vary in thickness.

8. If you post the distance between the top of your tires and the distance between the bottom of your tires and the diameter of your tires (24 in, 25in) I will tell you your camber.

9. C'mon folks! We are talking about a GPV Competition which uses washers in between the axle plate and frame for camber. Applying trigonometry or attempting any other math calculation to determine the camber on a GPV is like using a tire pressure gauge to see if you really got the "100 psi" Shox solid tires the DME said they sold you.

Take a picture with a good horizontal reference point and go from there. Paste into Microsoft Word, draw a vertical line on top of it, then change the orientation using the "format" function until the line is parallel with the wheel.

Let's not even get into checking toe in/toe out!

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