Adjustment instructions of rear derailleur with larger cogs Instructions for the correct adjustment of rear derailleur with larger cogs In the distance adjustment of the rear derailleur from the teeth of the larger cog you have to take extra care that the inner cage of the derailleur itself, especially during descent, does not touch the gear tooth.  In the photo 1 it is shown the inner side of the cage marked by the tooth of the cog because the adjustment WAS NOT CORRECT  In the photo 2 it is highlighted interference between the internal cage of the front derailleur and the end of the teeth of the cog; also in this case the adjustment  WAS NOT CORRECT  N.B. ATTENTION, THE INTERFERENCE OF THE DERAILLEUR CAGE WITH THE TEETH OF THE COG CAN CAUSE THE BREAKING OF THE TEETH OF THE COG