Hey John - I just got back this weekend from a 1500 mile ride down to TN and around the Smokies with the 12" Progressive 412s on. Don't know anything about how to measure travel, but I gotta tell you what a great improvement to the ride - I'm 170lbs and had two bags loaded on the first setting (softest ride) and had no problems riding the Dragon. Only bottomed out twice on a couple severe bumps on the ****ty Illinois roads - would recommend these shocks to anyone