I love details and have no shame admitting that I'll happily toil for hours over the smallest part on my personal bike, which is why I'm getting all aroused by these small black rubber additions to the '11 Session. What are they, you ask? Built in fork bumpers that keep your stanchions from coming into direct contact with your frame. They do the same job as the rubber bumpers that are found on all double crown forks, but unlike those, they won't rotate or slide around and will always be in correct spot. A much cleaner solution I must say. While they may look to be simple, glued on pieces, they are actually a structural part of the frame and are connected to each other via a threaded fastener that runs through the downtube. Trek's engineers have said that rather than the tube's strength being compromised by having two holes on each side, it is actually more robust with the addition of the bolted together bumpers.