|HOME TOE IN/OUT GAUGE
CONSTRUCTION AND USE AND CAMBER MEASUREMENT
This gauge is useful to check alignment at the races or at home especially if you have
gone off course or hit some heavy bumps. Practice pulling the tape measure to get the same
tension front and rear of the wheel when measuring.
1. Construction of the toe in/out gauges.
- Get two pieces of 0.040 aluminum sheet, 24 inches x 18
- Cut off each corner and smooth the edges.
- Mark a line across the long dimension that is 6 inches
from one side.
- Bend the sheet 90° at the line. The short side will
sit on the ground (bottom) and the long side against the tire (side).
- Mark two notches one inch deep on each side approximately
3 inches from the bottom.
- Cut each notch wide enough for a tape measure to fit into.
Smooth the edges.
See picture 1
- Cut carrying handles as noted in
picture 2 if desired. They make
it easier to more them around.
- Make the second one EXACTLY the same as the first one.
2. Use of toe in/out gauges.
- Park car on level ground with wheels pointed straight
ahead and steering wheel centered.
- Place a toe in gauge against each wheel as shown in
- Use a weight to hold the gauge steady as shown in
- Pass the tape measure under the car then go to the other
side and hook the end into the slot as shown in
- Put the other end of the tape in the slot on the other
side and pull the tape SNUG, but not so tight it deforms the aluminum gauge and record the
measurement as shown in
- Repeat the last two steps for the other side of the wheel,
recording the measurement.
- Take the difference between the measurements of the front
and rear of the tires then divide by 2 and that is the toe in/out per wheel in inches.
NOTE: If the front dimension is smaller
than the rear dimension you have toe in, otherwise it is toe out.
Refer to the chart below to convert to minutes or degrees
of toe. There are 60 minutes to one degree. A good rule of thumb is 1/16 inch toe in per
wheel front and 1/8 inch toe in per wheel rear for a car doing autocrosses/time trials.
NOTE: This chart is based on a toe gauge
that is 24 inches wide and will NOT be accurate for other widths.
Toe measurement 1/16 inch or 0.0625 inch = Toe angle
Toe measurement 1/8 inch or 0.125 inch = Toe angle 17.9051 minutes
Toe measurement 3/16 inch or 0.1875 inch = Toe angle 26.8578 minutes
Toe measurement ¼ inch or 0.25 inch = Toe angle 35.8106 minutes
Toe measurement 5/16 inch or 0.3125 inch = Toe angle 44.7638 minutes
Toe measurement 3/8 inch or 0.375 inch = Toe angle 53.7172 minutes
Toe measurement 7/16 inch or 0.4375 inch = Toe angle 1.04452°
Toe measurement ½ inch or 0.5 inch = Toe angle 1.19375°
Toe measurement 9/16 inch or 0.5625 inch = Toe angle 1.343°
Toe measurement 5/8 inch or 0.625 inch = Toe angle 1.49225°
Toe measurement 11/16 inch or 0.6875 inch = Toe angle 1.64152°
Toe measurement ¾ inch or 0.75 inch = Toe angle 1.79079°
Toe measurement 13/16 inch or 0.8125 inch = Toe angle 1.94008°
Toe measurement 7/8 inch or 0.875 inch = Toe angle 2.08938°
Toe measurement 15/16 inch or 0.9375 inch = Toe angle 2.23869°
Toe measurement 1 inch = Toe angle 2.38802°
3. Camber measurement, perform after measurement of toe
- Use a carpenters square and place against the wheel
with small side on the floor.
- Ensure the long side is vertical.
- Measure the distance between the square and the lower rim
edge in 32nds and record as shown in
- Measure the distance between the square and the upper rim
edge in 32nds and record as shown in
- Subtract the lower reading from the upper reading and
refer to the chart below to get the amount of negative camber.
NOTE: If the lower dimension is smaller
than the upper dimension you have negative camber, otherwise it is positive camber. Refer
to the chart below to convert to minutes or ° of camber. There are 60 minutes to one
degree. Camber settings will depend on what type of tire used and how the car is to be
driven, but should probably never be positive!
NOTE: This chart is based on 15inch
diameter wheels, the most common on 914s it seems and will NOT be accurate for other
CAMBER MEASUREMENT BASED ON 15 INCH WHEELS
Camber measurement 1 - 32nds or 0.03125 inches = Camber
angle 7.16201 minutes
Camber measurement 2 - 32nds or 0.0625 inches = Camber angle 14.324 minutes
Camber measurement 3 - 32nds or 0.09375 inches = Camber angle 21.4861 minutes
Camber measurement 4 - 32nds or 0.125 inches = Camber angle 28.6483 minutes
Camber measurement 5 - 32nds or 0.15625 inches = Camber angle 35.8106 minutes
Camber measurement 6 - 32nds or 0.1875 inches = Camber angle 42.9731 minutes
Camber measurement 7 - 32nds or 0.21875 inches = Camber angle 50.1358 minutes
Camber measurement 8 - 32nds or 0.25 inches = Camber angle 57.2987 minutes
Camber measurement 9 - 32nds or 0.28125 inches = Camber angle 1.07436°
Camber measurement 10 - 32nds or 0.3125 inches = Camber angle 1.19375°
Camber measurement 11 - 32nds or 0.34375 inches = Camber angle 1.31315°
Camber measurement 12 - 32nds or 0.375 inches = Camber angle 1.43255°
Camber measurement 13 - 32nds or 0.40625 inches = Camber angle 1.55196°
Camber measurement 14 - 32nds or 0.4375 inches = Camber angle 1.67137°
Camber measurement 15 - 32nds or 0.46875 inches = Camber angle 1.79079°
Camber measurement 16 - 32nds or 0.5 inches = Camber angle 1.91022°
Camber measurement 17 - 32nds or 0.53125 inches = Camber angle 2.02966°
Camber measurement 18 - 32nds or 0.5625 inches = Camber angle 2.1491°
Camber measurement 19 - 32nds or 0.59375 inches = Camber angle 2.26856°
Camber measurement 20 - 32nds or 0.625 inches = Camber angle 2.38802°
Camber measurement 21 - 32nds or 0.65625 inches = Camber angle 2.5075°
Camber measurement 22 - 32nds or 0.6875 inches = Camber angle 2.62699°
Camber measurement 23 - 32nds or 0.71875 inches = Camber angle 2.74649°
Camber measurement 24 - 32nds or 0.75 inches = Camber angle 2.866°
Camber measurement 25 - 32nds or 0.78125 inches = Camber angle 2.98552°
Camber measurement 26 - 32nds or 0.8125 inches = Camber angle 3.10505°
Camber measurement 27 - 32nds or 0.84375 inches = Camber angle 3.2246°
Camber measurement 28 - 32nds or 0.875 inches = Camber angle 3.34417°
Camber measurement 29 - 32nds or 0.90625 inches = Camber angle 3.46374°
Camber measurement 30 - 32nds or 0.9375 inches = Camber angle 3.58334°
Camber measurement 31 - 32nds or 0.96875 inches = Camber angle 3.70294°
Camber measurement 32 - 32nds or 1 inches = Camber angle 3.82257°