Park Tool Derailleur Hanger Alignment Gauge - DAG-3
$181.99
Park Tool Derailleur Hanger Alignment Gauge - DAG-3 Item # 889928
Description
An alignment gauge is essential for diagnosing and repairing bent or misaligned derailleur hangers, often the source of shifting problems. The DAG-3 features an all-new design, engineered and built to be light, accurate and versatile. The sliding indicator can measure derailleur hanger alignment against bicycle rims of any size, and rotates out of the way to clear seat stays, racks, and other obstacles, allowing 360 degree measurement. The long, precision-extruded aluminum body is built to exacting tolerances and provides ample leverage for making adjustments.
Features:
- Compatible with 16" to 29"+ wheels (ISO/ETRTO rim sizes from 317 to 630+)
- Replaceable M10 threaded tip
- Low-profile head fits low clearance thru-axle derailleur hangers and Shimano® Direct Mount hangers
- Length: 16.5" (420 mm)
- Weight: 22.75 oz. (645 g)
Part Numbers for Park Tool Derailleur Hanger Alignment Gauge - DAG-3
Videos
Videos
Reviews
Rated 5 out of
5
by
MMelito from
You get what you expect from a Park Tool
Consistent with previous Park Tool purchases the build material and quality are immediately obvious. The tool, fit for purpose with little assembly was ready for use quickly. Only criticism i would have are the included instructions, however Park Tools online video resources exceed the instructions. There are less expensive copy's available from amazon, but if you want shop level quality and accuracy, look no further.
Date published: 2022-10-18
Rated 5 out of
5
by
Hyip2 from
Park derailleur hangar alignment tool
Built like a park tool, tested on my mountain bike and found it off a few degrees or about 1/4” when checked at the rims. It shifted ok but shifted even better when straightened 👍👍
Date published: 2025-06-25
Rated 5 out of
5
by
Dmack from
A great tool for derailleur adjustment
Get it if you're upgrading or checking an old bike
Date published: 2025-06-19
Rated 5 out of
5
by
cbrealey from
Perfect little unit
Great value. Easy to use. Park Tool quality. Gets the job done.
Date published: 2025-06-09