not resolvedOK, I want to get on my bike, one of them. I have an old steel bike and a less old carbon. Both have problems this year and I cannot unravel them.
Steel bike. Chain is skipping! only starting off from a dead stop. But almost every dead stop! It's dangerous if you are racing in front a bus. No autoshifting. Just a loud noise as it skips then you start off and you lose all forward locomotion. Often you can recover after this happens and it is fine until the next full stop.
Here is what I have done: Chain has been replaced. Freewheel (7 speed) replaced. I think the old ones were OK but they were getting old. Problem unchanged. derailleur (nuovo record) cleaned up and pulleys inspected - they look very good! I am sure I had them off last year but they spin easy. Alignment of derailleur is fine. Chain tension seems fine in all gears. Checked cable tension (not sure why this would matter in a friction drivetrain but it is fine). Note that the bike setup was perfect 2 years ago but I already noticed this skipping problem last year (and had tried to fix).
Second problem - the carbon. A little clicking sound around the BB. Does not seem completely periodic but mostly so. Noted that the click seems to get milder under full load like going up hill. Here's what I did yesterday, mostly replacements from my toolbin or else rebuilds: chain, chainring bolts, bottom bracket, pedal axles (one had a little play in it), clean and reinstall jockey wheels, check and lube all cables. Same annoying click. Also checked headset and saddle/seatpost as well as cleat/shoe contact. I think this problem developed at the end of last season.
I invite all puzzle solvers to submit their suggestions. If you can spot the problem, I promise you will get your reward in heaven or possibly even sooner.
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