I was taught a simple (too simple, so it couldn't possibly be accurate.. maybe) procedure from old guys I respect.
Plane on the ground in normal loaded state
- establish your center plumb line on the ground
- clamp a 3 ft or longer 3/4" angle to the brake rotor extending forward of the wheel
- measure distance from center line to angle near the wheel - and from a spot 36" forward from center line to the angle.
- 1" differential means 1 degree, obviously 0.5" would be a half degree. Simple method to determine what shim you need, or not.
For Camber adjustment - I'd simply look at the tire wear pattern & let that dictate if you need any shims.
Hey Ralph,
FYI, 1" displacement, 36" from the axle gives me 1.59 deg. Someone please check my math.
Hey Ralph,
FYI, 1" displacement, 36" from the axle gives me 1.59 deg. Someone please check my math.
Jim,
Some people say those tires are much heavier than the original tires. Has that created any problems for you?
Thanks.
John
Instead of trying to calculate the toe-in you need you can measure it with this clever little tool.
https://www.ebay.com/itm/Gunson-G4008-Trakrite-Wheel-Alignment-Gauge/281523066414?epid=14034410930&hash=item418c15162e:g:ArkAAOSwa9FbBpFV
Interesting. I wonder how it works - it looks like it might depend on the side friction of a tire that isn't rolling exactly straight over the gauge. If that's the case, I wonder how well it would work on or aircraft tires - our tires have such a smaller footprint than auto tires, especially our high camber tires.
Jim,
Some people say those tires are much heavier than the original tires. Has that created any problems for you?
Thanks.
John
That's what I got too. You need about a 5' straight angle, not 3', to get 1" = 1 Deg.
It should be 1/2? per wheel for the calculation since you want each wheel to the centerline , not to each other.