Several months ago I replaced all gearing parts and switched from an 8 speed to a 10 speed system. All parts were brand new.
After replacing I noticed the chain slipping occasionally. Though I drive for months now, the phenomenon first happened days after replacing all parts.
I had the derailleur cable tightened after several weeks and once more after several months (it was tight enough this time).
- on the cassette (whatever it is)
- without heavy load (not accelerating from stand, riding uphill, putting only slight pressure to drive slow)
- with moderate and heavy force too
- without bumpy road
- not during shifting the gears
- with front gear 2 and rear gear 3 - 8, front gear 3 and rear gear 8 - 10 (I rarely drive lower gears, can't say whether it happens or not)
- at most once within 50 km
- with the same rate after more than 1000 km
- with the rear derailleur Dyna-Sys switch on and off
- reproduce it (at will)
- say whether it happens in all gear combinations or not
- say what exactly happens (chain trying to change the gear or messing things up somehow on the gear) since I can't see it
I had two thoughts:
- the joined link could be a little bit stiff (but I can't see any stiffness when spinning the chain in stand)
- the derailleur is not properly justified (I had it realigned after several weeks and months, though must admit, I'm not a professional in doing this)
The chain is properly and regularly lubed.
Should I still assume a stiff link or the derailleur being misaligned? What could be another reason?
- FC-T521 3 speed crankset
- XT 10 speed cassette CS-M771-10
- XT FD-T780-6 66-69° 3/10 speed front derailleur
- CN-HG95 10 speed chain
- Shadow Plus RD-M786 10 speed rear derailleur