Setting your Dimensions:

You will set your REAR Dimension first, your goal is to make the rear dimensions as close to square as possible. CLICK HERE To See Rear Dimension Sheet

Go to the True Laser Track on your Right Rear hub, project the laser beam straight down and level it off. (The laser has a level bubble on the topside).  We are going to work with 28’, 14’ to the front of the spindle and 14’ to the back of the spindle (you can work with any measurement you have space for in your prep area) Take your tape measure and with the laser beam facing straight down at the floor, measure 14' ahead and put a piece of tape down. Place the target on the tape.  Now rotate the laser up to the front target, level it off and center the beam up on the front target. When you rotate the laser, make sure that you don’t rotate it up into the air, always rotate it down (the laser is harmful if you place the beam into your face and eyes) this will establish the Right Rear “front” dimension.  Now you will establish the Right Rear “rear” dimension.  Rotate the same Right Rear laser back down again facing the floor, level it off, then take the tape measure and  measure 14' to the rear and put a piece of tape down there  to establish the rear dimension. (Always set the targets right on the tape so you can get repeatability.)    Rotate the laser to the rear, level it off and center the beam on the target in the back. You just established the Right Rear “rear” dimensions so you’ll just repeat the same process to establish the Left Rear dimensions.

Measuring the REAR toe:

After you set your rear dimension you are now ready to set the rear toe.  With a True Laser Track on your left rear and right rear, project the lasers forward to the front targets and level them off.  Measure the distance from the laser dot on the left target to the laser dot on the right target. Lets say that the front measurement is 87 ¾.  Do the same procedure for the rear targets, just project the lasers to the back targets and take that measurement.  Lets say the rear measurement is 87¾  The dimensions between the front and the rear targets over a 28' span are 0”, that means our rear is straight. That’s the measurement you are looking for.  Now you can move on to the front targets and measuring for toe.

Setting your FRONT dimensions:

Go to the True Laser Track on your Right Front hub, project the laser beam straight down and level it off.  (The laser has a level bubble on the top side).  You are going to work with 28’, 14’ to the front of the spindle and 14’ to the back of the spindle (you can work with any measurement you have space for in your prep area) Take your tape measure and with the laser beam facing straight down at the floor,  measure 14’ ahead and put a piece of tape down. Place the target on the tape.  Now rotate the laser up to the front target, level it off and center the beam up on the front target.  This will establish the Right Front “front” dimension.  Now you will establish the rear dimension,  Rotate the same Right Front laser back down again facing the floor, level it off, then  take the tape measure and  measure 14' to the rear and put a piece of tape down there  to establish the rear dimension. Always set the targets right on the tape so you can get repeatability.  Rotate the laser to the rear, level it off and center the beam on the target in the back. You just established the Right Front “rear” dimensions so you’ll just repeat the same process to establish the Left Front dimensions. Please note, you should have 4 pieces of tape down on the floor on the right side and also 4 pieces of tape on the left side.   

Figuring your Front Target measurement:

Go to the True Laser Track that’s on the Right Rear hub, turn on the laser, rotate the laser dot to the front target and level it. The center line on the front target is the track width of the rear end. Now what we are going to do is establish the relationship between the measurement of the Right front and Right Rear. Go to the Right Front and turn on the Right Front laser, rotate that up to the front target and level it. Now measure the difference between the two dots that are projected on the Front target.

Figuring your Rear Target measurement:

Go to the True Laser Track that’s on the Right Rear hub, turn on the laser, rotate the laser dot to the Rear target and level it. The centerline on the rear target is the track width of the rear end. Now what we are going to do is establish the relationship between the measurement of the Right front and Right Rear. Go to the Right Front and turn on the Right Front laser, rotate that up to the Rear target and level it. Now measure the difference between  the two dots that are projected on the Rear target.

Are they the same?

If the measurements are the same on the Rear targets as they are on the Front targets then the rear end and the front end are running parallel and square. Now that we’ve established the right side tires are running parallel we’re going to check our toe.

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