SunRace R91 9 speed long cage rear derailleur
High polish aluminum and steel construction
279 grams
min cog 11t
max cog 28t
rear capacity 17t
front max capacity 22t
total capacity 39t
guide and tension pulley 11t
This derailer has a "R90" etched in subtle satin silver script onto the body but it is in fact model R91, confusing? Yes!
RD-R91, RDR91