Language
ViewDownload PDFOther manuals

Camber & Caster Gauge

ASDCG203•Digital LCD
User Guide
AutoSolo · ASDCG203

00 · About this guide

Contents.

This guide covers safe setup, camber measurement, caster measurement, and warranty for the ASDCG203 Digital Camber and Caster Gauge. Read the safety section before first use.

  1. 01Anatomy & specs01
  2. 02Safety · Setup02
  3. 03Order of adjustment03
  4. 04Camber measurement04
  5. 05Caster measurement05
  6. 06Quick reference07
  7. 07Care · Troubleshooting08
  8. 08Compatible · Warranty09

!Read first

  • Mount on a clean, flat metal surface. Grit between magnet and surface skews readings.
  • Re-center the torpedo level before every reading. If the level is off center, the reading is wrong.
  • Always consult the vehicle’s factory service manual for the camber and caster spec. Do not rely on rule-of-thumb tolerances.
  • The magnetic base can affect nearby electronics. Keep away from credit cards, hard drives, and pacemakers.
ASDCG203 · User Guide
Anatomy & specs

01 · Anatomy

Know the gauge.

Measurement reading displayPower display indicatorDecimal pointPower on/offInward tilt · Negative camberZero mode indicatorOutward tilt · Positive camberCentering torpedo levelZero button

Tech specs

Measurement range-90° to +90°
Resolution0.1°
DisplayBacklit LCD
Power2× AAA batteries
HousingHigh-density aluminum
BasePermanent Magnet

Controls

  • On/off. Power the LCD on or off.
  • Zero. Set the current angle as the new zero reference for caster sweep.
  • Torpedo level. Confirms the gauge is mounted vertically before each reading.
  • Magnetic base. Holds the gauge to any flat steel surface.

LCD indicators

  • Tilt arrow. Points toward the side of the gauge tilted away from vertical.
  • Power indicator. Battery level.
  • Zero mode. Shown when the gauge is in caster-sweep zero state.
  • Decimal. Reading is to 0.1°.

What’s in the box

  • 1× ASDCG203 Gauge
  • 1× User Guide (this booklet)

Batteries sold separately.

ASDCG203 · User Guide01
Safety · Setup

02 · Safety · Setup

Mount & level.

!Before you begin

  • Work on a flat, level, hard surface. Uneven ground gives false readings.
  • Set tire pressure to the door-placard spec on all four wheels.
  • Chock the rear wheels. Engine off. Parking brake on.
  • The magnet attaches to steel only. It will not hold to aluminum or alloy hubs without an adapter plate.

Mounting options

A

Use with an AutoSolo wheel clamp

The cleanest mount for alloy wheels. AutoSolo offers multiple wheel clamp models and they all accept the magnetic adapter plate. Attach the magnetic adapter plate to the center of any AutoSolo wheel clamp. Seat the gauge in the center on the adapter plate so the magnetic base makes full contact and does not rock. The plate face represents the wheel plane, so a clean full contact seat is the alignment.
B

Mount directly to the brake rotor

When no clamp is available. Remove the wheel to expose the brake disc, or work through the wheel if you can reach a clean rotor face. Attach the magnetic base to a clean, flat area of the rotor face. Verify the gauge is vertical and the torpedo level is centered before reading.
01

Level the gauge

Adjust position until the torpedo level is centered between its lines. The gauge must be vertical for any reading to be valid.
Tip: If the level cannot be centered, the mounting surface is not flat. Re-clean and re-seat.
02

Power on

Press ON/OFF. The LCD displays the current angle. Proceed to camber or caster measurement on the next pages.
ASDCG203 · User Guide02
Order of adjustment

03 · Before you start

Order of adjustment.

Set caster first, then camber, then toe last.

1

Caster

A caster change can move camber, so read camber again after you adjust caster.
2

Camber

A camber change moves toe, because the knuckle tilts while the tie rod stays the same length.
3

Toe

This gauge does not read toe, so measure toe with toe plates after your last camber change.
ASDCG203 · User Guide03
Camber · Reading

04 · Camber

Reading camber.

Camber is the inward or outward tilt of the wheel as seen from the front. The ASDCG203 reads it directly once mounted vertically with the level centered. A caster change can move camber, so read camber again after you adjust caster.

Gauge mounted to wheel · camber-read position
01

Confirm mount & level

Magnetic base seated flat on the adapter plate, level centered. Power on. The LCD shows the current camber angle with an arrow indicating the direction of tilt.
Just measured caster? Turn the gauge off and on to clear ZERO, so it reads true vertical.

Interpret the reading

The arrow on the LCD points toward whichever side of the gauge is tilted away from vertical. Use it to read the sign of the camber angle.

Negative · inward tilt at top
Positive · outward tilt at top
02

Read the tilt arrow

Inward arrow (toward the magnet / wheel side) = top of wheel tilted toward the vehicle = negative camber. Outward arrow (toward the bubble level side) = top of wheel tilted away from the vehicle = positive camber.
03

Compare to factory spec

Pull the camber spec from the vehicle’s factory service manual. If the reading falls outside the OEM range, adjust at the strut or upper control arm following the FSM procedure.
Tip: Repeat the reading after every adjustment. Re-center the level each time.
ASDCG203 · User Guide04
Caster · Sweep

05 · Caster

The 40° sweep.

Caster cannot be read statically. You measure the change in wheel tilt across a 40° steering sweep, then convert that swing to caster with a fixed factor. Front wheels must sit on turn plates so they can pivot freely.

Position 1 · 20° out (press ZERO here)
Position 2 · 20° in (read result here)

!Required

  • Turn plates (ASWG008 pit-rack, or ASWG004 drive-on with ASRP004 ramps). Gauge stays mounted to the same wheel throughout the sweep.
01

Sweep to 20° out

Mount the gauge per Setup. With pins removed from the turn plates, rotate the steering wheel outward to 20° OUT. Verify against the turn plate degree scale.
Note: Hold the brake pedal down the entire time, through the final reading.
02

Re-center the level · Press ZERO

The wheel tilt has shifted with the sweep. Re-center the torpedo level. Press ZERO to set this position as the new reference.
Tip: Skipping the re-center is the most common cause of bad caster readings.
ASDCG203 · User Guide05
Caster · Read

05 · Caster

Read & interpret.

After ZEROing at 20° OUT, sweep through center to 20° IN. The displayed angle is the tilt swing, not caster yet. Multiply it by 1.46 to get true caster. The arrow tells you the sign.

03

Sweep to 20° in

Rotate the steering wheel inward 40° total, stopping at 20° IN (the opposite direction from the OUT position). Verify against the turn plate. Re-center the level if it has shifted.
04

Read the swing, then convert

The LCD shows the change in tilt across the sweep. This swing is not your caster figure yet. Multiply the displayed number by 1.46 to get true caster. True caster = displayed swing × 1.46. Example: a 2.9° reading × 1.46 = 4.2° caster.
Use the free AutoSolo Caster Calculator at autosolotools.com/pages/caster-calculator. Enter your sweep reading and it returns true caster.

The arrow tells you the sign

  • Inward arrow (toward the magnet / wheel side) = positive caster.
  • Outward arrow (toward the bubble level side) = negative caster.

The rule is the same for the left and the right wheel. Most passenger vehicles run positive caster (2° to 7°).

05

Repeat and average

Run the caster sweep 3 to 4 times. Record each reading. The average is your working caster value.
Tip: Re-center the torpedo level at every sweep position. Level drift is the biggest source of variation between sweeps.
ASDCG203 · User Guide06
Quick reference

06 · Quick reference

Procedure cheat sheet.

A condensed version of both procedures for use under the car. Full step-by-step guidance is on pages 4 to 6.

Camber · 3 steps

StepAction
1Mount the gauge. Base seated flat, level centered.
2Power on. Read the angle + arrow direction.
Outward arrow = positive. Inward arrow = negative.
3Compare to the vehicle’s factory service manual spec.

Caster · 6 steps

StepAction
1Sweep steering to 20° OUT. Verify on turn plate.
2Re-center the level. Press ZERO.
3Sweep steering to 20° IN (40° total swing). Re-center the level.
4Read the displayed angle. Inward arrow = positive caster.
Outward arrow = negative caster.
5Multiply the swing by 1.46 to get true caster. (e.g. 2.9° × 1.46 = 4.2°)
6Repeat 3 to 4 times. Average the readings.

Order: caster, then camber, then toe last with toe plates.

Typical OEM tolerances

MeasurementTypical OEM range
Camber±0.5° from spec
Caster±0.5° from spec · L/R difference <0.5°

Always consult the vehicle's factory service manual for its tolerance window. The ranges above are typical, not universal.

ASDCG203 · User Guide07
Care · Troubleshooting

07 · Care

Care & troubleshooting.

Cleaning & storage

  • Wipe the gauge body with a soft cloth. Avoid solvents that attack rubber seals.
  • Wipe the magnetic base after each use. Steel filings stuck to the magnet skew the next mount.
  • Power off when not in use. Remove batteries for long-term storage.
  • Store in a dry location. Keep away from strong magnetic fields and high-temperature areas.

LCD blank or dim

Replace the batteries. Confirm correct polarity. Check for corrosion in the compartment.

Reading drifts between sweeps

Re-center the torpedo level at every position. Re-seat the magnet on a clean surface. Confirm the floor is level in both directions.

Left and right wheels differ

Confirm tire pressures match the door-placard spec. Confirm the surface is level across the track. Repeat each reading three times and average.

Magnet will not hold

Mounting surface is aluminum or alloy. Use an AutoSolo wheel clamp or the ASWL470 tire clamp with the magnetic adapter plate.

Level will not center

Mounting surface is not flat. Clean and re-seat. If still not centering, the surface itself is bent or damaged.

Caster reading is unstable

The most common cause is not re-centering the level after each sweep step. Run the sweep 3 to 4 times and average.

ASDCG203 · User Guide08
Compatible · Warranty

08 · Ecosystem

Compatible & warranty.

AutoSolo tools work together as a system. The ASDCG203 pairs with the wheel clamps and turn plates below for at-home camber and caster work.

Compatible products

SKUProduct
ASWG001Magnetic Wheel Clamp · for alloy-wheel mounting
ASWG001TCWheel Clamp with Tire Claws
ASWG002Wheel Clamp
ASWL470Tire Clamp · alternate mounting
ASWG008Pit-Rack Turn Plates · for caster sweep on a rack
ASWG004Drive-on Turn Plates · for caster sweep at ground level
ASRP004Drive-on Ramp Kit · pairs with ASWG004

1-year replacement warranty

AutoSolo warrants the ASDCG203 against manufacturing defects for one year from original retail purchase. Non-transferable. Coverage excludes abuse, modification, shipping damage, water immersion, and battery leakage.

How to claim

  • Email support@autosolotools.com within 30 days of discovering the defect.
  • Include proof of purchase and photos of the defect.
  • Wait for return authorization before shipping anything back.

Limitation of liability

AutoSolo’s liability is limited to repair or replacement of the product. AutoSolo is not liable for indirect, incidental, or consequential damages, including lost time, lost use, or damage to the vehicle. Warranty is void if the claim is filed outside the one-year period.

This warranty does not affect your statutory rights.

ASDCG203 · User Guide09
Visit our websiteautosolotools.com
Multi-lingual Manualsautosolotools.com/manuals
For technical questions email or call us atsupport@autosolotools.com
415.849.0275
ASDCG203User Guide · v4.0 · 2026-11
©AutoSolo® 2026
All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced without the express written consent of AutoSolo.