Shimano 105 FC-R7100 12 Speed Crankset Size:172.5mm The internal Ultra-Shift™ mechanism controls

The internal Ultra-Shift™ mechanism controls the 13-speed rear derailleur

Use a degreaser and brush and begin working the degreaser into the chain links

Waxed based formula reduces metal to metal contact

4° outsweep

Use a quality grease when installing in steel or aluminum BB shells

Shimano 105 FC-R7100 12 Speed Crankset Size:172.5mm The internal Ultra-Shift™ mechanism controlsThe Shimano 105 FC R7100 12 Speed Crankset offers an optimized balance between lightweight and efficiency without sacrificing stiffness. The crank is formed with hollow aluminum technology and finished with a durable gloss black anodizing. Resin ribs on the back of the chainrings are 105's unique structural design that achieves both weight reduction and crisp shifting performance. Features Optimal balance of stiffness, strength, weight and rotational