preHAG Alignment checker tool

If you've been working on your bike for a while, you are well acquainted with the simple derailleur hanger and it's importance to your shift quality. The HAG has been a cornerstone tool in the Abbey catalog for a long time and it's accuracy is unparalleled in the industry. But what if you just want to check hanger alignment in a quick easy manner without removing your rear derailleur? Enter the preHAG!