It started when I accidentally forced my rear wheelset in place where the Rear derailleur pulley and chain where also forced in place, because I forgot to put the shifter to the smallest cog. After that my Di2 RD won't shift anymore smaller than the 5th cog, it can shift up to the bigger cogs...

Since putting a 12-30 cassette on (replacing 11-28) I've had problems with chain occasionally skipping down from the biggest r cog... Fixed not by adjusting tension or limiting screw (my first trials) but initially very successfully by loosing the b screw (which was fully in before) a few...

Driven creates 49% less friction when compared to the market leading chain and derailleur drivetrain, claims CeramicSpeed. CeramicSpeed are aiming to shake up the cycling component world with its new Driven drivetrain. The truly revolutionary concept eliminates the need for both front and rear...

With the diversification of road cycling and the growth of gravel and multi-surface riding, Shimano has responded with the introduction of the new Ultegra RX rear derailleur with chain stabilizing technology. httpv://www.youtube.com/watch?v=3uGEtC6gjac The new RD-RX800/RX-805 rear derailleurs...