SHIMANO ULTEGRA CS-R8101 12-SPEED CASSETTE exclude_premium_shipping high-elastic

high-elastic

4" 700C x 50mm Diameter 27

3 standard keys

the bag is just as convenient to carry off the bike

heat-treated steel

SHIMANO ULTEGRA CS-R8101 12-SPEED CASSETTE exclude_premium_shipping high-elasticGreat 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