SHIMANO ULTEGRA CS-R8101 12-SPEED CASSETTE Size:11/30T Front Light Lumens and runtime

Front Light Lumens and runtime certified to the ANSI-Standard

Seamless fingertip construction

Back panel: 82% polyester

Improved Hard-Case puncture protection provides best-in-class defence against flats

Length front fender: 780 mm

SHIMANO ULTEGRA CS-R8101 12-SPEED CASSETTE Size:11/30T Front Light Lumens and runtimeGreat speed means great responsibility. That's why, faced with the task of making the new ULTEGRA groupset even faster, Shimano decided to take a holistic and 100% performance focused approach. Shimano's new 12 speed road groupset delivers unparalleled control and comfort anytime, anywhere whether you're competing in an amateur race, chasing your personal best, or out for a social ride. That is "Science of Speed". And it's what sets SHIMANO apart from