Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair
Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel | The Bike Affair

Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel


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Shimano 105 Hollowtech II FC-R7100: Elevate Your Cycling Experience with Lightweight and Efficient Crank Design

The Shimano 105 Hollowtech II FC-R7100 is a front chainwheel that redefines the standards for lightweight, rigidity, and durability in road cycling. Crafted with precision and innovation, this aluminum crank offers a perfect balance of efficiency and aesthetics. Explore the features that make the FC-R7100 a standout component for cyclists seeking optimal performance.

Optimized Lightweight Design: The FC-R7100 features newly designed crank arms that strike the ideal balance between lightweight construction and efficiency. The use of hollow aluminum technology ensures a lightweight build without compromising on rigidity and durability. This optimized design allows cyclists to benefit from reduced weight, enhancing overall bike performance.

Luxurious Gloss Black Anodized Finish: Shimano takes aesthetics seriously, and the FC-R7100 showcases a luxurious gloss black anodized finish. This finish not only adds a touch of elegance to your bike but also provides a durable and resistant surface. The sleek and attractive appearance of the crank enhances the overall look of your bicycle.

Resin Ribs for Weight Reduction and Shifting Performance: The chainrings on the FC-R7100 incorporate Shimano 105's unique structural design – resin ribs on the back. This design serves a dual purpose: achieving thorough weight reduction while ensuring crisp and precise shifting performance. The combination of lightweight construction and optimal shifting makes the FC-R7100 a reliable choice for cyclists.

Hollowtech II Technology: The FC-R7100 is part of Shimano's Hollowtech II series, known for its advanced crankset technology. Hollowtech II utilizes a hollow, external bottom bracket for improved stiffness and weight reduction. This technology enhances power transfer efficiency, allowing cyclists to experience a more responsive and enjoyable ride.

Upgrade to Shimano 105 FC-R7100: Enhance your cycling experience by upgrading to the Shimano 105 Hollowtech II FC-R7100 front chainwheel. Whether you're a dedicated road cyclist or an enthusiast seeking superior performance, this crank delivers on its promise of lightweight design, rigidity, and durability. Elevate your ride with the cutting-edge technology of Shimano 105.

Experience Effortless Pedaling: Ride with confidence and experience effortless pedaling with the Shimano 105 Hollowtech II FC-R7100. Elevate your cycling performance, enjoy the benefits of a lightweight design, and showcase the stylish gloss black anodized finish as you take on the roads with precision and efficiency.


Features of Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel

  • Optimal balance of stiffness, strength, weight and rotational performance
  • Hollowtech II structure cuts weight yet maintains strength for better power transfer
  • Crank arm length: 160, 165, 170, 172.5, 175 mm
  • Gear combination: 50-34T, 52-36T
  • Q-factor: 148 mm

Specifications of Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel

Model No  FC-R7100
Series Shimano 105 R7100 Di2 Series
Color Black
Average Weight (g) 754 (50-34T)
Rear Speeds 12 - 12
Compatible Chain HG 12-Speed
Chain Line (mm) 44.5 - 44.5
P.C.D. (mm) 110 - 110
Spider/Gear Arms 4
Chainring Combination 50-34T, 52-36T | 50-34T, 52-36T
Q-factor (mm) 148
Crank Arm Length (mm)|160 Yes
Crank Arm Length (mm)|165 Yes
Crank Arm Length (mm)|170 Yes
Crank Arm Length (mm)|172.5 Yes
Crank Arm Length (mm)|175 Yes
Optional Chain Guard|Without Chain/Bash Guard Yes
Hollowtech II Yes
Hollowtech Crank Arm
Compatible Bottom Bracket Type|Outboard Yes
Recommended Bottom Bracket|Threaded (normal) SM-BBR60 | SM-BBR60
Recommended Bottom Bracket|Press-Fit SM-BB72-41B | SM-BB72-41B
Threaded Bottom Bracket Shell Width (mm)|68 Yes
Threaded Bottom Bracket Shell Width (mm)|70 Yes
Crank Fixing Screw Included Yes

Technology of Shimano 105 Hollowtech II FC-R7100 12 Speed Front Chainwheel

Hollowtech II:

Providing the best balance of stiffness, strength, weight and rotating performance
The concept of Hollowtech II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.

The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.
High Precision Sealing

Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.

24mm Diameter Axle And Bearings:

Why choose the 24mm axle and bearings for the Hollowtech II crankset?

The diameter of the Bottom Bracket axle and bearings was of primary importance for the development because the Bottom Bracket axle area is tied to such key elements as stiffness, strength, weight and rotating performance.

What’s important is the total balance of crankset:

In addition, taking the crankset as a whole, the total balance of crankarm rigidity, axle stiffness, bearing position and others is essential.

Indeed, the crankset is designed by careful consideration of the total balance of those elements to prevent breakage.

Outboard Bearing:

For most frames with 68mm Bottom Bracket shells, Hollowtech II with 24mm axle can set the bearing position outside of the frame to provide better weight distribution and more stability.

24mm Diameter Axle And Bearings Provide Optimum Balance For The Crankset:

After studying all these problems thoroughly, we made the decision to adopt the 24mm diameter axle and bearings, which have the optimum balance, for the Hollowtech II crankset.

In addition, an examination of the total crankset, including the crankarm and gears, proves the optimum balance of rigidity, weight and rotating performance for the ultimate transfer of power to your bike. Hollowtech II is simply the most optimized crankset design on the market.

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