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Park Tool DAG-2

Item #: TL289H00
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USD$67.46 10% off USD$74.95 msrp
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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.
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Park Tool DAG-2
 
5.0

(based on 12 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Rugged (4)

Cons

    Best Uses

    • Keep in the garage (3)
      • Reviewer Profile:
      • Avid cyclist (5)
      • Was this a gift?:
      • No (7)

    Reviewed by 12 customers

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    Displaying reviews 1-10

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    5.0

    must have in every well eqiped tool case

    By MichiBretz

    from Redondo Beach

    About Me Competitive Cyclist

    Verified Reviewer

    Pros

    • Easy Use
    • Rugged

    Cons

    • Heavy
    • Hulking

    Best Uses

    • Anything With A Derailleu
    • Anything With Derailleur

    Comments about Park Tool DAG-2:

    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.

    • Was this a gift?:
    • No
     
    5.0

    Essential Tool

    By feetup

    from Vancouver Island Canada

    About Me Avid Cyclist

    Verified Buyer

    Pros

    • Rugged

    Cons

      Best Uses

        Comments about Park Tool DAG-2:

        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!

        • Was this a gift?:
        • No
         
        5.0

        cant go wrong with park tools

        By k604

        from simi valley, ca.

        About Me Avid Cyclist

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about Park Tool DAG-2:

              if you want your bike to shift properly you need one of these in your tool box

              • Was this a gift?:
              • No
               
              5.0

              Park Tool Derailleur Hangar Alignment

              By Crunch Goes the Bike

              from Laguna Beach, CA

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Easy
              • Fast
              • Lightweight

              Cons

              • Expensive

              Best Uses

              • Keep In the Garage
              • Mountain Bikes

              Comments about Park Tool DAG-2:

              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.

              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              5.0

              Every serious rider should have a Dag 2

              By Senior1

              from Phoenix, AZ

              About Me Casual/ Recreational

              Verified Buyer

              Pros

              • Essential

              Cons

              • None

              Best Uses

              • Keep In the Garage

              Comments about Park Tool 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

              • Was this a gift?:
              • No
               
              5.0

              Great Tool!!!

              By jeppymon

              from Palmyra, Pa.

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Good Grip
              • Lightweight
              • Right Tool For The Job
              • Rugged
              • Versatile

              Cons

                Best Uses

                  Comments about Park Tool DAG-2:

                  Had a bike mishap, crashed and bent up my derailleur. Could not shift in every gear smoothly afterwards. Derailleur didn't look bent? Got this tool and it worked great. Simple to use and did not take long to correct problem. Now I am able to shift fine, like a new bike! This is a must tool for the tool box!!!!

                  • Was this a gift?:
                  • No
                   
                  5.0

                  Have to have for home mechanic

                  By Gonzo

                  from Charlotte, N. Cackilacky

                  About Me Avid Cyclist

                  Verified Buyer

                  Pros

                  • Easy to use
                  • Rugged

                  Cons

                    Best Uses

                    • Bring it With You
                    • City Bikes
                    • Keep In the Garage
                    • Mountain Bikes
                    • Road Bikes

                    Comments about Park Tool DAG-2:

                    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.

                    • Was this a gift?:
                    • No
                     
                    5.0

                    (mostly) flawless design

                    By Will

                    from Colts Neck, NJ

                    Verified Reviewer

                    Comments about Park Tool DAG-2:

                    I use this on every bike that I work on, whether I think it has a bent hanger or not. In most cases, there is some mis-alignment, and starting out by using this tool, you can head off a good deal of headaches later.

                    The operation of the tool is very simple...remove derailleur, replace wheel (and of course, clamp it in the dropouts) and screw in the gauge. As long as you check your work on 3 spots (I prefer the top, bottom, and left, since they are the easiest to reach on most bikes) you are almost guaranteed an aligned hanger.

                    My only gripe with the tool is that as a function of it's design, it needs to be able to rotate. The axle that the tool is designed around, however, has a good amount of play in it. While this does not make it impossible to use the tool, it makes it more difficult than it has to be.

                    Bottom line, if you maintain your own bikes, or work on others, this is a tool you have to have, and the one made by park works well enough that the price should be no obstacle.

                     
                    5.0

                    Realigning Derailleur Hanger Not Easy

                    By quidam

                    from Longmont, CO

                    Verified Buyer

                    Pros

                    • Clear Instructions
                    • Online Video Available
                    • Solid Construction
                    • Well Designed

                    Cons

                    • No Angular Measurement
                    • No bubble level

                    Best Uses

                    • Has Only One Use

                    Comments about Park Tool DAG-2:

                    As with Park tools in general, the DAG-2 does what it is designed to do quite well: allow the user to align a bent derailleur hanger. In order to do a proper job one is supposed to bend the hanger on the vertical and horizontal axes. It's probably not necessary to use those specific axes as long as the ones you do use are perpendicular to one another, but you have to eyeball the bar's position; there is no bubble level or angular measurement integrated into the tool, and using a separate protractor or level would be something of a pita given that you are trying to hold the bar motionless while adjusting the gauge rod measuring distance to the wheel. I found the process reasonably easy, but I do wonder, considering the precision of some modern derailleurs, if this system is accurate enough to yield good results with them. I used it for a bike with non-index shifting.
                    The bar gives enough leverage that it's easy to over-bend. The instructions take this into account when describing the alignment process, but, depending on how the bike is mounted on a stand, it can also make it easy to move the entire bike, requiring the user to find a clumsy handhold on the frame and try to do a precise one-handed bend. This is not a major criticism, just a practical problem to bear in mind when using the tool.
                    Bear in mind that you are bending, and therefore fatiguing, a bit of steel welded onto the frame. This does weaken it and make it easier to bend back out of shape. Enough of this and it will break off or become too weak, requiring a frame builder to replace the dropout.
                    All in all, this is a good tool which I think an integrated bubble level or protractor would improve.

                     
                    5.0

                    Excellent product

                    By Bob

                    from winnipeg

                    Verified Buyer

                    Comments about Park Tool DAG-2:

                    If you haven't had your derailleur hanger checked you will never know how good your drive train should be!

                    Displaying reviews 1-10

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