KCNC jockey wheel system (Sram Eagle 12s)

-system cage + pulley wheel 14t + 16t
-the oversize pulleys reduce friction
-aluminium cage and wheels
-steel bearings
-narrow/wide teeth profile
-57gr the full set
-Compatibility and weight saving:

Shimano XT M800 / -9 gr
Shimano SLX M7000 / -46 gr