KCNC Jockey Wheel System - Pulley Wheels for Shimano 8000/9100 - colored

Perfect work with my dura ace 9100 in my Argon 18 e119 triathlon machine. No problems if in use with rear zipp super 9 disk wheel (the disk surface is safe), additional holes to change chain tension (more then original 2 shimano holes). Moreover easy change pulley toceramic bearings (in KCNC offer) for race days :-)

Excellent price to performance ratio - product outstanding over average . the most valuable features are:
1. More options (additional holes then original shimano cage) for chain tension regulation.
2. No problems with using with is disk rear wheel - easy to mount additional small washer to be sure (and have no exsert elements on disk side that may damage disk surface).
3. One may easy migrate to ceramic bearings (original are machine bearings) - there are ceramic bearings wheels form KCNC to buy for small money (and use for for race days)

this product should fit on my ultegra r8000 derailleur but it doesnt. The original pulley stystem has a hollow axle that allowes it to sink into the deraileur further. the axle of this part wil not go in the deraileur all the way hence making it impossible to insert the locking pen/bolt and unusable.

Bike24: Please contact the Bike24 customer support so we can assess the issue and provide a solution.