So, if you don't like the idea of broken shackles, there are a couple of upgrades you can make. For one, you can add shackles from an M38-A1, which has slightly longer bolts and has an additional ...

Fixing Shackle Inversion. Verne Simons Writer Sep 18, 2013. See All 3 Photos. ... It is either riding stiff and bouncing or leaning to one side, even though this part of the trail is flat.