Interesting issue with the Cannondale this morning. I went for my usual ride and when I dropped back into first the chain fell off the cassette on the inside jamming the wheel. Going slowly so I just jumped off. Switched off the clutch and pulled the chain out and put it back on the front sprocket. Spun the wheel by hand and it jumped off again. XTR shifter to XT clutched derailleur and 11-40 11 speed cassette. Virtually new, done maybe a few hundred km. Dropped it to 2nd and rode home keeping it in taller gears. Guessed that the limit screw had come loose and there was just enough play to pull the derailleur too far. Anyway back home on the bike stand it wouldn't shift to 11th and was stuck in 10th but would still pop off the cassette in 1st. Cable stretch would do the opposite. Then I noticed that the top sprocket on the derailleur was not in contact with the chain in 1st or 2nd. ????? So I loosened off the cable and reset it at the shifter and set the whole shebang up from scratch, winding the B limit in a few turns or in technical terms shitloads. All good now and shifts as it should. I am guessing that the chain was picking up the spacer in the derailleur in 1st and that on this ride that was enough to tip it past the 40 tooth sprocket on the cassette since the low limit was fine and lined up perfectly. No damage to the derailleur, no dropsy etc on recent rides just had an issue on the ride today . So has the B limit been slowly unscrewing or wearing to the point where this could happen? Never had this issue before. Went back on my ride and all good though I was keeping a wary eye (the one in the back of my head) on the lower gears. Thinking of throwing some loctite on the B limit screw unless there is another reason.
Anyone???????
Anyone???????
