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Park Tool DAG-2

Item #: TL289H00
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Park Tool DAG-2

The Park Tools DAG-2 Derailleur Hanger Alignment Gauge utilizes a longer measuring pointer, longer threaded stud and a longer, narrower alignment boss to fit a wider variety of bikes.
4.9 / 5.0
18 Reviews
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Every serious rider should have a Dag 2
Nearly all of my shifting problems over years have come back to a bent derailleur hanger. Hard to get right by eyeball. You'll save hours of frustration and (fewer bike shop dollars) by getting a DAG2

PROS: Essential

CONS: None
November 3, 2013
Location:
Phoenix
cant go wrong with park tools
if you want your bike to shift properly you need one of these in your tool box
February 26, 2014
Location:
simi valley, ca.
Park Tool Derailleur Hangar Alignment
This tool is essential for avid mountain bike riders that experience the occasional dent and ding of technical riding. It is quick to attach and align the hangar without removing the rear wheel and gets the bike back on the road quickly. It is a little on the pricey side for what it is but there is no other replacement that matches its quick and easy performance. Add it to the tool box and your friends will be sure to come to your garage at least once to use it.

PROS: Fast, Easy, Lightweight

CONS: Expensive

BEST USES: Keep In the Garage, Mountain Bikes
November 5, 2013
Location:
Laguna Beach, CA
A must have tool
Park Tool has done it again. This tool is PERFECT for fixing those annoying shifting problems. You won't regret buying this tool. It sure beats having to buy and replace hangers all the time. This tool is easy to use and will straighten out your hanger every time.

PROS: Durable, Quality, Rugged

BEST USES: Road Bikes, Mountain Bikes, Keep In the Garage
October 21, 2014
Location:
Utah
must have in every well eqiped tool case
Super easy and intuitive to use.
Don't forget to rotate the wheel with the tool to compensate for a possible untrue wheel.

For Shimano Shadow Derailleurs (sorry but someone should come up with a better name for this thing!) you can also leave that fist chip on the hanger and adjust including that piece as this thing usually bends as well when you hit a rock and adjusting the hanger only will not help.
All you need to do that is an additional 10mm washer.

PROS: Rugged, Easy Use

CONS: Heavy, Hulking

BEST USES: Anything With A Derailleu, Anything With Derailleur
August 12, 2014
Location:
Redondo Beach, CA
Just a great simple tool!
Just simply a great tool, and easy to use. I can't imagine trying to install, re-install or adjust a derailleur without first aligning the hanger with this tool. Thank you Park Tools for another great tool, and I plan on using almost anytime I have to adjust my deraileur, its just so easy.

PROS: Rugged, Easy to use
March 8, 2015
Location:
New Jersey
Most cost effective tool your can buy.
In the long run this tool will save you more money and headache than any other tool you will buy. I can easily straighten all but the most mangled derailleur hangers. I actually use mine even when installing a new hanger just to make sure everything is aligned. A well build and designed tool.

PROS: Rugged

BEST USES: Keep In the Garage, Mountain Bikes
November 9, 2014
Location:
Boston
Have to have for home mechanic
This thing will pay for itself the first time you use it. If you ding your derailleur off a rock, tree, curb, competing rider, small farm animal, etc.., this thing will straighten out your hanger and get you shifting again. Simple to use and is pretty much idiot proof.

PROS: Rugged, Easy to use

BEST USES: Bring it With You, Mountain Bikes, Keep In the Garage, City Bikes, Road Bikes
December 12, 2012
Location:
Charlotte, N. Cackilacky
I should have bought this years ago!
I work on my friends and neighbors bikes, buy and sell a few too. I've 'straightened' a couple of hangers by eye, and gotten them closer to straight. After buying myself a newer high-end cx bike that looked to have a bent derailluer hanger, I finally decided to step up and get the right tool for the job, and bought the DAG-2. I've used it on about a dozen bikes since I got it 2 weeks ago, only 2 of those did not need hanger straightening. My neighbors 1 week old carbon fiber road bike ($1200 on sale) needed straightening, as did my friends high end East Coast cf road race bike -I think it's true that new bikes often have bent der. hangers.
It was easy to use the first time, - the directions are easy to follow. Now that I've used it a few times, it's super easy and really fast.

If you work on bikes, ride a lot, or have multiple bikes, (and like your derailluer to be straight) you need this tool.
July 10, 2012
Location:
Tacoma
Essential Tool
You don't use this tool often but it is the key to smoothest shifting. I checked out all the bikes in the household and even the newest frame was out of alignment. The tool is fast and easy to use and rigid enough to use as both alignment gauge and straightening tool.
I love it!

PROS: Rugged
July 31, 2014
Location:
Ladysmith B.C. Canada

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.