Originally Posted by FBinNY

One last note.

Here's my easy way to measure rake on an installed fork. You'll need a wheel small enough that it'll clear the downtube when the fork is reversed, a piece of string and a fine tip marker.

Install the wheel and tie the string around the rim (anyplace) with a big loop so it can center nicely when pulled.

Turn the fork forward, and pull the string to a reference mark like the spindle center on the left crank. (let the fork and wheel float to whatever position they want) Pull it taut and mark it. Flip the fork and repeat, marking the new position.

Measure the distance between the dots, divide by two and you have the rake.

The reason I like this method is that it eliminates the need to judge when the fork is truly squared up at 180°.