Shimano Oversized Derailleur Cage - 105 R7100 & R7000
Kolossos is the Greek word for a statue, much larger than the original subject. Seems fitting for an oversized derailleur cage.
Imagine the performance of replacing your stock pulleys with a ceramic 12-tooth top pulley and a 19-tooth bottom pulley built on the stiffest cage on the market.
Besides reduced friction, this cage is built with shifting accuracy, gravel worthiness, and chain retention in mind.
This model will fit on 105 R7100 electronic and R7000 derailleurs. This includes short (SS) and medium (GS) cage lengths.
Please note** Installing this oversized derailleur cage typically requires replacing your chain to accommodate the larger pulleys.