Portable Wheel Alignment Tools

[David Pozzi]

A Smartlevel is pretty accurate for measuring camber, you can find charts to determine caster using one but you need to accurately turn the wheel in and out a given angle for each reading. Toe can be set using trammel bars or flat plates against the wheels and tape measures. String lines are great but take a lot more work to accurately set up.
The prof road race teams use stringlines and dial calipers to measure.

I use a bubble gage from Speedway, they have a good price on them. A digital gage is probably more accurate but they need batteries and need to be zero'd before use, plus they cost more.

Verify any camber gage by clamping a carpenters level or piece of bar stock vertically in a vise, put the gage against one side, take a "camber" reading, then put it against the opposite side and read again, the true zero point is half way between the two readings.