Bob McEnaney gave me an idea for another t.o.t.w. on last Sat. ride. When we were riding side by side, he said his bike wasn't shifting very well. I suggested that we stop and turn his rear derailleur adjuster half a turn counter clockwise. That did the trick! The problem is that shifter cables stretch out, especially if it is new. One way to avoid some of that is to pre-stress the new cable once it is on the bike. Grab the cable with your fingers at the chain stays and pull it away from the stays. That will stretch it out a little, but you will probably have to use the barrel adjuster for a fine adjustment later on when the cable stretches out again. Usually that will be the end of the stretching out. Just remember counter clockwise, and just a half turn at a time.Read More
From VeloNews' Lennard Zinn:
"Inspect all tubes for cracks, gouges, buckles, dents, and paint stretching or cracking, especially near the joints where stress is highest. With a carbon frame, use the "coin test" to check for damage to underlying carbon layers. Tap on the tube with a quarter in the questionable areas and compare it with the sound on other tubes, in surrounding areas, and on the opposite side. If you have delamination or cracking in underlying carbon layers, especially in central areas away from the joints, you'll be able to hear the difference; the damaged fibers deaden the nice "clack" sound you hear when tapping on an undamaged tube. If in doubt, take it to an expert for advice. Carbon structures that look good on the outside shouldn't get softer unless the layers start delaminating, and the coin test may be able to detect such areas."