Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge Tool,Blue

Excellent tool! Extremely satisfied with the product! Great value for money! High quality, durable product!

Great tool. Having borrowed one from a friend, I could see the benefits of having my own. Park Tool make some of the best bike tools, this is one, for its purpose this is perfect, it makes setting the derailleur hanger alignment so very easy and accurate.

No doubt this is expensive, but it actually makes doing the job really easy, so on balance I think it’s worth it. My derailleur hanger was badly bent in an accident, but with this tool I got it back into position, and everything works fine again. I uses after you’ve used it twice it will have paid for itself.

I fitted brand new genuine Shimano Altus brake/shifters (brifters) and an Altus 8 speed derailleur to a second hand 2011 bike. No matter what I tried, the large ring on the front and the 2 largest cogs on the rear cassette caused the chain to come off the lower jockey wheel and jam next to the lower jockey wheel in the derailleur cage. Although there should be cross chaining noise, this jamming should not happen. The derailleur cage did not look anywhere close parallel with the chain line. The derailleur hanger looked straight until I put this tool on it. I found a huge 2.5+ inch difference on opposite horizontal sides of a 700c wheel rim. The vertical was not as bad, but still very unequal. This was very surprising as the hanger looked okay to the eye. I was able to use the Park Tools video on youtube to learn how to correct this. I used two colours of an ohp/cd marker (alcohol marker) for vertical / horizontal instead of the o-rings included. Don’t bend in large amounts, just go back and forth between opposite sides and bend small amounts. I used a strip of double sided velcro on the rear brake lever to hold the wheel still when needed. After a couple of test rides, the problem is now solved !

Watched a few videos on how to use the gauge properly, took me a few attempts, SRAM derailleur shifting seamlessly now

Average quality, to heavy and not easy to use

Checking you derailleur alignment is crucial to getting good consistent shifting. There are a lot of cheaper tools that will do the job a couple of times, but if you want something that will last and do the job consistently then you need a really sold tool and this Park Tool gauge is absolutely rock solid and easy to use.

I had a suspicion that my mech hanger was out of alignment, as shifting wasn’t as precise as it once was. After messing around with indexing and limit screws for ages I bit the bullet and decided to get a mech hanger alignment tool. It’s a relatively expensive bit of kit, especially as it hopefully won’t see much use. I Decided to go for the Park Tool product, as opposed to the cheaper Lifeline one sold by CRC, as Park generally have quality, pro standard tools. I was really satisfied with build quality. After reading the instructions and watching the video on Park’s website, I found my hanger was about 6mm out of alignment. A simple process to get it back in shape, and shifting back to normal! Decided to look at my other bikes hanger alignment too, and found that I was able to get the shifting much crisper by tightening up the hangers’ alignment. An essential purchase for any serious home mechanic.

Sturdy tool, super handy to adjust derailleur hanger alignment. A must have to keep shifting perofrmances

Ottimo prodotto che te lo dico a fare

herramienta que no se usa mucho pero que es fundamental cuando el cambio lo tienes doblado o la patilla del cambio. Muchas veces te vuelves loco con el ajuste y no es mas que el cambio esta desalineado. La herramienta esta muy bien terminada y como repito...indispensable aunque sea un uso ocasional

Una herrería execelente,calidad parktool algo de rebabas en la sona de la soldadura pero buena calidad

Nachdem mein gravel Bike auf die Schaltung gefallen ist, waren die großen Ritzel auf der Kassette nicht mehr zu schalten. Da sich an der SRAM X01 Eagle axs eigentlich nix verziehen kann (Carbon) habe ich das Schaltauge getauscht. Die Schaltung ließ sich dennoch nicht mehr perfekt schalten. Jetzt habe ich das neue Schaltauge mit dem Park Tool DAG-2.2 geprüft. Heftig Fehlstellung, easy ausgerichtet. Danach schaltet wieder jeder Gang perfekt. Gerät ist sehr gut verarbeitet, kein Spiel, einfach zu bedienen. Klare Empfehlung