Shimano Dura-Ace CS-R9100 11 Speed Cassette Size:11-28 SILCA valve stem extenders for

SILCA valve stem extenders for tubular tires and tubes with removable valve core

Compatible with Shimano HG-EV and HG-X11 chains

Caffélatex turns instead into foam

or downhill machine

Shimano Dura-Ace CS-R9100 11 Speed Cassette Size:11-28 SILCA valve stem extenders forUsing a carbon fiber and alloy spider and five titanium sprockets, the Shimano Dura Ace CS R9100 11 Speed Cassette provides accurate shifting and light weight to the most discerning road cyclists. Specifications CFRP & alloy spider arm 5 titanium sprockets Rider tuned gearing Lightweight Gear Ratios 11 28: 11 12 13 14 15 17 19 21 23 25 28 11 30: 11 12 13 14 15 17 19 21 24 27 30 Mfr Claimed Weight 193g (11 28T) 211g (11 30T) Shop the flagship Shimano