My touring bike has fallen over three time on the derailleur side, wasn't shifting well in certain gears. New chain, rings, and cassette... replaced the rear derailleur in the upgrade... what was wrong, it looked ok...., OK, took off the rear fender, rack, dropped the chain, cleaned up the hanger and installed the Park DAG 2.2 hanger adjustment gauge. the Hanger was off about 12^ in vertical plane, about 6^ in the horz plane. With the bike in my park stand, and a friend supporting the bike, I applied some force in the two planes, a little at a time. My alignment seems to be spot on...., and guess what, no more shifting problems.... Yes, it was worth it.
Verified purchase: Yes | Condition: New
The derailleur tool works well but is a little hard to use. You have to move the offset rod up and down when checking the hanger. It does straighten the hanger very easily so do a little at a time. Next time I would look at some of the other options which cost a little more.
Verified purchase: Yes | Condition: New
This is a high quality tool that works perfectly. It is easy to use and gets you back on the trail. I had two bikes that were shifting badly after minor wrecks. A Trek marlin 7 and a Rocky Mountain instinct 930. Within a half hour of receiving the tool i had both bikes working like new.
Verified purchase: Yes | Condition: New
Park Tools always perform as advertised and this derailleur hanger tool is no exception. It is easy to use, of excellent quality, and instinctive to use for a relatively experienced home mechanic.
Verified purchase: Yes | Condition: New
The sliding indicator gauge make aligning across the lateral cross section very easy. Simply touch the wheel with the sliding indicator, then rotate the tire, slide the indicator out of the way of the wheel, rotate the tool to check true on the other side at the same point on the wheel. If the hanger is out of alignment, the tool has a long lever, which makes adjusting the hanger very easy.
Verified purchase: Yes | Condition: New
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