The Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge, click to enlarge
More Images

Item # DAG-2.2

/ Tools / Derailleurs & Shifting / Frame & Fork

Derailleur Hanger Alignment Gauge

A misaligned derailleur hanger can cause skipping, missed shifts, and wreak general havoc on your bicycle's drivetrain. The DAG-2.2 is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers, diagnosing and solving many shifting problems. Compatible with virtually all derailleur-equipped bicycles, and adjusts to work with wheels from 16" to 29"+.

View Product Details

$83.95

Temporarily out of stock

Get notified when this item is back in stock

By submitting your email address, you agree to Park Tool’s Privacy Policy, the collection, processing, and use of your email address in order to provide stock notifications.

DAG-2.2 Features

  • Compatible with 16" to 29"+ wheels (ISO/ETRTO rim sizes from 317 to 630+)
  • Fits most frame/hanger combos including low clearance thru-axle derailleur hangers
  • Length: 420 mm (16.5")
  • Weight: 645 g (22.75 oz.)

Documentation

Press

  • Bicycling Review Park Tool’s Derailleur Hanger Alignment Gauge is on its third iteration. The DAG-2.2 gets a head design refined to make it stronger, and the longer, narrower threaded tip is replaceable and better fits hangers that have a hood or tight frame clearance. The tighter tolerances of the 2.2 mean I can get hangers aligned a bit quicker. It also meant less wiggling of the arm on the head to find an alignment point, resulting in better precision when aligning new or bent hangers.

  • BikeRadar: Best New Bike Gear Poor rear shifting is all too commonly caused by a mis-aligned rear derailleur hanger. To correct this, a derailleur alignment tool provides the answer and there’s none more commonly used than the Park Tool DAG. The DAG-2.2 is a shop-tool that’s priced to be accessible to all.

Parts & Accessories

DAG-2.2

Replacement Parts

DAG 2.2 Derailleur Hanger Alignment Gauge

Q&A


Reviews