The top level brown cables are one of the worst things Shimano has made, I worked somewhere that would swap them out before selling a bike as they'd inevitably clog stuff with shed coating and come back in ruined, the blue ones aren't as bad but you're better of just getting a slick/die drawn stainless cable.
The top level brown cables are one of the worst things Shimano has made, I worked somewhere that would swap them out before selling a bike as they'd inevitably clog stuff with shed coating and come back in ruined, the blue ones aren't as bad but you're better of just getting a slick/die drawn stainless cable.