Replacement for SHIMANO 1x Jockey Wheels (11s)

If you are on your rear mech's 2nd + season, the chances are that the bearings in your jockey wheels / derailleur pulleys are getting a bit slack and worn.

Shimano's jockey wheel material is soft and wears very quickly in gritty conditions. 

BBB BDP-12 is a straight swap into your SHIMANO GRX 11s 1X mech, with a hard glass fibre material and ABEC 7 ceramic bearings, these will have your gears changing nicely again. 

Compatable with Shimano 9/10/11 speed, Campag 11 speed, pre 2011 SRAM, Shimano Mega Range, SRAM 11s X0/X9/X7