Ultegra FC-R8100 12 Spd. Size:172.5mm Power Light System (PLS) gives

Power Light System (PLS) gives more power and speed

Low-profile design avoids damage from rocks

Low battery status is indicated by rapidly flashing sidelights

Gear combination: 48-31T

Racket is medium-fast speed reinforced with two Carbon plies adding stability and enlarging the sweet spot

Ultegra FC-R8100 12 Spd. Size:172.5mm Power Light System (PLS) givesULTEGRA's new FC R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms. An integral part of Shimano's new 12 speed road lineup, the FC R8100 crank builds upon Shimano's legendary front