The 4860's have 300 mm of travel. Are you considering sticking with that length or lowering down to around 250? Reason for my question; I just picked up a 2015 800 adventure and the first "real" mod is suspension upgrades. I measured the 4860's from a set I have laying around and want to go this route but wonder if the increased length on a new rear shock to match the increased length would cause too much angle on the swing arm. That rake angle would potentially cause too much twitchiness as well, but having a 300 mm travel GS would be schweeeet. I converted my 690 to 300mm from the stock 250 without changing the rake so no problem there. The difference in suspension performance was fantastic.