Park Tool Wheel Alignment Gauge - QKWAG4
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Product Information
Full details
The Park Tool WAG-4 Wheel Alignment Gauge is an essential precision instrument designed for bicycle mechanics and home enthusiasts who need to ensure their wheels are perfectly centered, or 'dished,' between the hub locknuts. Ideal for maintaining road, mountain, and BMX bikes, this tool guarantees optimal wheel performance and structural integrity, though it requires a basic understanding of wheel truing principles to be used effectively.
All features
| Model Part Number | QKWAG4 |
|---|---|
| Brand | Park Tool |
Extended Product Information
FAQs
Can I use the WAG-4 on a wheel with a flat tire?
Yes, the tool is designed to work with or without a tire installed, and the tire's condition does not affect the measurement.
Will this work with thru-axle hubs?
Yes, because the tool measures the distance from the rim to the hub locknut/end cap, it is compatible with standard quick-release and most thru-axle configurations.
Do I need a truing stand to use this?
While it can be used on a bike, a truing stand makes the process of adjusting the dish significantly easier and more accurate.
How do I know if my wheel is 'dished' correctly?
If the gauge makes identical contact with the hub on both sides of the wheel when flipped, your wheel is correctly dished.
What is the material composition of the tool?
The WAG-4 is constructed from durable, high-strength materials typically found in professional shop tools, finished in the signature Park Tool blue.
Troubleshooting
The gauge doesn't seem to sit flat on the rim.
Ensure that there is no dried mud or debris on the rim edge and check that your tire bead is properly seated.
The sliding indicator is difficult to move.
Check the rail for grit or minor damage; a light cleaning with a dry cloth is usually sufficient to restore smooth movement.
Pros and Cons
Pros
- Compatible with a wide range of wheel diameters (16"-29")
- Works with tires mounted, streamlining the workflow
- Universal hub width compatibility
- Durable, high-quality construction
- Essential for professional-grade wheel building
Cons
- Requires a truing stand for full effectiveness
- Manual tool that requires some practice to master
- Larger profile compared to simple spoke wrenches
Setup, Compatibility & Care
The WAG-4 comes pre-assembled and ready to use. Because it relies on mechanical contact to measure, it is important to keep the sliding surfaces clean and free of debris that might affect precision. Store the gauge in a dry, safe place to prevent the metal frame from bending. To maintain compatibility, ensure the sliding adjustment pointer moves freely along the guide rail. If you are working with wheels of different sizes, simply adjust the sliding center indicator to match the profile of the wheel being serviced. No periodic recalibration is usually required, provided the tool is not dropped or subjected to heavy force.