Shimano 105 FC-R7100 Hollowtech II Crankset

Shimano 105 FC-R7100 2x12-speed Crank - Highly efficient and amazingly lightweight

The FC-R7100 is the matching 2-speed crank for the 105 R7100 12-speed groupset from Shimano and brings maximum power transfer efficiency to your road bike. At the same time, shifting is as fast and precise as usual. The crank weighs only about 50 grams more than the comparable Ultegra model, which is mainly due to the hollow-formed aluminium crank arms. Thanks to the Hollowtech II design, which has been tried and tested for years, with a fixed 24 mm axle, the ratio of stiffness, performance and weight is just right. The small chainring is made entirely of aluminium, while durable composite is also used on the large chainring. FC-R7100 has an asymmetrical 4-arm bolt circle diameter of 110 mm. It produces a chainline of 44.5 mm and has a Q-factor of 148 mm.

Specifications:

Application:

Road

Compatibility:

Shimano 2x12-speed

Chainring Mount:

110 mm bolt circle diameter, 4-arm asymmetrical

Technical Information:

Series:

105 R7100

Crank Arm Material:

aluminium

Chainring Material:

aluminium / composite material (GFRP) / aluminium

Axle Material:

steel

Gradation:

34-50

Crank Arm Length:

160.0 mm, 165.0 mm, 170.0 mm, 172.5 mm, 175.0 mm

Chainline:

44.5 mm

Q-Factor:

148 mm

Axle Diameter:

24 mm

Compatible BSA Shell Width:

68 mm

Recommended Bottom Bracket:

SM-BBR60 or SM-BB72-41B Press Fit Hollowtech II (not included)

Recommended Chain:

CN-M7100

Compatibility:

2x12-speed:

Shift/Brake Lever:

ST-R7120, ST-R7170, ST-R8150, ST-R8170, ST-RX820, ST-RX610, ST-R8060, ST-R9250, ST-R9270, ST-R9160, ST-R9180

Front Derailleur:

FD-R7100, FD-R7150, FD-R8150, FD-R9250

Bottom Bracket:

BB-R9100, SM-BB9000, SM-BBR60, SM-BB6700, SM-BB5700, BB-RS501, BB-RS500, SM-BB4600, SM-BB92-41B, SM-BB72-41B, SM-BB71-41B, BB-RS500-PB

Chain:

CN-M8100, CN-M9100, CN-M7100, CN-M6100

Features:

• perfect balance between stiffness, stability, weight and rotational efficiency
• optimised power transfer
• fast, high-precision shifting at the front
• hollow crank arms (Hollowtech)
• anodised crank arms and chainrings
• stainless steel chainring bolts

Technology:

Hollowtech II
Shimano Hollowtech II is a crank bottom bracket system designed to achieve an ideal ratio of stiffness, weight and rotational efficiency. It is based on an integration of the bottom bracket and the right crank arm and works with a 24 mm axle or bearing diameter, which has proven to be optimal in terms of stability. In many cases, the bearing cups are on the outside so that the load is better distributed. High-quality precision seals ensure a long service life.

Manufacturer Numbers:

160.0 mm 34-50:

IFCR7100MX04

165.0 mm 34-50:

IFCR7100AX04

170.0 mm 34-50:

IFCR7100CX04

172.5 mm 34-50:

IFCR7100DX04

175.0 mm 34-50:

IFCR7100EX04

Contents:

• 1 x Shimano 105 FC-R7100 crankset (34-50 tooth)
• 1 x Shimano crank bolt