Originally Posted by formulaben

FYI, there are 3 models of Gossamer; the double, the triple and the compact. Each of these models also comes in a "MegaExo" version which has outboard bearings and integrated bottom bracket, so make sure you know which one you want. I recommend the MegaExo version. As for the "dust cap", you are referring to the MegaExo version; there is a preload cap on the left side that is tightened to push the crank up against the bearing, then the main crank bolts on the end of the crank actually keep the crank on (see picture below.) If viewed from the drive side, the shaft is hollow.