Shimano Ultegra R8100 12s Hollowtech II crankset

Shimano Ultegra R8100 12s Hollowtech II crankset

231.49 €

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Features of Shimano Ultegra R8100 12s Hollowtech II

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Specifications Shimano Ultegra R8100 12s Hollowtech II

Features of Shimano Ultegra R8100 12s Hollowtech II

Color Black

Color

Black

Recommended Use Road Cycling

Recommended Use

Road Cycling

Product Type Sets

Product Type

Sets

Product description of Shimano Ultegra R8100 12s Hollowtech II crankset

Description summary

Experience the pinnacle of road cycling with the SHIMANO Ultegra R8100 crankset. As a key part of the new 12-speed lineup, it delivers legendary quick, precise shifting and efficient power transfer. Featuring HOLLOWTECH II and HOLLOWGLIDE technology, it achieves an optimal balance of stiffness, strength, and low weight for superior performance. Now available in more arm lengths from 160-175mm, it offers a perfect fit and enhanced performance for smaller riders, triathletes, and anyone seeking biomechanical perfection. Upgrade your ride for seamless shifting and superior efficiency

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ULTEGR´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 shifting and transmission efficiency. With new refinements for seamless 12-speed shifting, the ULTEGRA crank is now offered in lengths from 160 to 175 mm, bringing performance and improved fit for smaller riders, triathletes, and riders with specific biomechanical requirements.

Features:

- Optimal balance of stiffness, strength, weight and rotational performance
- HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting
- 52-36 and 50-34 chainring options. 160, 165, 170, 172.5, and 175 mm crank arm lengths.

Specifications:

- SERIES: ULTEGRA R8100 Series
- Average weight: 711 (52-36T) 700 (50-34T)
- Threaded bottom bracket shell width (mm)_70: Yes
- Chainring combination: 52-36T 50-34T
- Compatible bottom bracket type_Outboard: Yes
- Crank fixing screw included: Yes
- 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
- Spider/Gear arms: 4
- HOLLOWGLIDE: Yes
- HOLLOWTECH II: Yes
- HOLLOWTECH crank arm: Yes
- Optional chain guard_Without chain/bash guard: Yes
- Recommended bottom bracket_Press-fit: SM-BB72-41B
- Recommended bottom bracket_Threaded (normal): SM-BBR60
- Threaded bottom bracket shell width (mm)_68: Yes
- Q-factor (mm): 148
- Chain line (mm): 44.5
- Compatible chain: CN-M8100
- P.C.D. (mm): 110
- Rear speeds: 12

Technology:

hollowglide:
- Hollow technology on outer chainring High rigidity hollow structure cuts down on weight yet maintains strength. Better power transfer and quicker and more precise front shifting

Hollow forged crank arms:
- A lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. amic performance is affected by wind direction. To create the D2 rim, SHIMANO engineers considered both frontal and cross winds, aiming to achieve optimal performance in real-world riding conditions. Extensive prototype testing, in the wind-tunnel and on the road, proved that a wide rim shape with a deep tire bed performs best across a wide range of conditions. At yaw angles ranging from 0 to 15 degrees, the SHIMANO D2 rim profile reduces air drag better than others aero shape rims. This rim design also boosts lateral wheel stiffness and offers improved vertical compliance for increased control, comfort and durability on the road.

HOLLOWTECH II:
- Providing the best balance of stiffness, strength, weight and rotating performanceThe 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.

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Technology in Shimano Ultegra R8100 12s Hollowtech II crankset

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What our customers are saying about Shimano Ultegra R8100 12s Hollowtech II crankset

This Shimano Ultegra crankset is praised for its exceptional quality, reliability, and high performance. A lightweight and affordable upgrade, it improves pedaling efficiency and offers excellent value, with quality comparable to Dura-Ace. Available in various crank arm lengths like 165mm and 170mm, it features a stunning design. Buyers often seek information on compatibility between 11-speed and 12-speed groupsets, such as the R8000 and R8100 series, to ensure a perfect fit

Ultegra crankset 160mm

2025/10/22

Jean-Philippe

Super product Fast delivery A-1 service !!!!!

Amazing

2025/07/24

Jan

Helped my knee and hip pain! I first switched from 172.5 to 165mm... and now 160mm made helped even more!

Very good crankset

2025/04/26

Jens

Love it. Changed 172,5 to 165 mm cranks. Hugh difference in pedalling technic and efficiency. Fast delivery from bikeinn, too!

Perfect

2024/06/28

Pep

All right.

Crankset R8000 to R81000

2024/05/20

Kawpos

Good morning, the r8000 pedalboard cymbals are compatible with the r8100 pedalboard.

High quality shimano

2024/04/12

Duda Sant'ana

Excellent value for money, worth every penny.

Excellent value for money

2024/04/12

Duda Sant'ana

Cheaper than Dura-Ace and of similar quality... highly approved.

Everything ok

2024/04/05

Leopoldo

Everything ok from order to delivery punctuality and courtesy regarding the Ultegra crankset I think that for those who know Shimano there are no comments to make thanks to all the INN staff

Top levering!

2024/02/01

Rico

The ordered crank was neatly packaged and received within the stated order time. Just as it should be, great!

Reliable Cranks

2023/10/24

Eric

I bought these cranks as backups for when I travel. Most frames my size come with 172.5 mm cranks; however, I ride 170 mm cranks. These are affordable, reliable, and never disappoint. Highly recommend.

Stratoppp

2023/08/01

Gaspare

Stratopppp Crankset Exceptional Light and performing

High quality.

2023/05/31

Joao

Fast delivery and amazing fit for my Allez Sprint! Good option and almost no diference for dura ace option.

Shimano is always great

2023/04/18

Scott

These are great value over DA. Good value.

Shimano is always great

2023/04/18

Scott

Great value over DA. Ultegra is overall best value over other groupsets.

...

2023/03/30

Peter

Fast wealth. Good price and excellent quality. Thank you.

Perfect

2023/03/02

david

Material in perfect condition, well packaged

Legit Shimano R8100 Crank

2023/01/23

Gary DC

This arrived with the box and manual, un-used/open and guarantted original..

Perfect

2022/12/16

Sergio

Received according to description, everything perfect.

Cool cranks

2022/12/15

User

Stunning view and quality. Fast delivery from bikeinn

Excellent response

2022/10/27

Yannis

Excellent response and in perfect condition

Perfect

2022/10/21

Jorge

Fast shipping, exceptional quality and a good price

Everything's fine

2022/08/28

ANTONIO

Very fast and a delivery in perfect condition

Perfect

2022/07/17

OSCAR ANDRES

A delivery in perfect condition and very fast

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Write your question

Mounting

2025/09/01

Jorge

Does it come assembled as selected, or do the cranks and chainrings come separately? Thanks!

Answer of Aljosa

Cranks and chainrings come assembled.

Answer of Ariel

They are assembled together :)

11-speed compatibility

2025/08/18

Angela

Hello. I have an 11-speed Shimano 105 groupset and would like to know if it´s compatible. Thanks.

Answer of Aljosa

It's compatible if you have same number of teeth on your 105 groupset

Carbon

2025/08/06

bryan

Are the plates carbon?

Answer of Aljosa

Shimano Ultegra R8100 is made of Aluminium and axle is made of Steel.

Answer of Baptiste

Everything is aluminum

Excellent product

2024/04/25

Marcio Oliveira

Original product with box that protects the extremely high quality product. and the product is perfect and as I expected.

Ultegra color crank black or gray

2024/03/30

After a Google search, sometimes it says Ultegra 8100 color black and color gray. Is there a color choice? Example: Shimano Ultegra crankset R8000 172.5mm black aluminum

Answer of CHEVEZ

The one I ordered from this page is all black.

Answer of Gary

No, you will just get one design..

Answer of giacomo

no there is no choice of colours, the color is matte black as seen in the photo

Answer of Guillermo

Ultegra´s r8000 cranks are the "gray" ones and the r8100 cranks are matte black. As far as I am aware there are no color options, each model has its own

Full crankset 160mm

2023/08/27

Manuel Costa

Good afternoon, do you not have a crankset similar to this one in stock but measuring 160 mm? Thanks

Answer of Gaspare

Hi, the smallest size is 165 mm

Compatible with 11 speed cassette

2023/07/09

John

Is this compatible with Ultegra r8000 11 speed cassette and chain?

Answer of Gary

I have similar GS, I´m using r8000 for RD/FD, Casette and Chain and this works perfectly..

compatibility

2023/05/24

ALBERTO

Is it compatible with the shimano 105 di2 12-speed group?

Answer of Gary

there should be no issue since this is shimano crank, it will work with Di2 FD/RD (105 or Ultergra) GS..

Answer of João Felipe

Yes. Would be better check in the Shimano´s website.

Answer of Jorge Manuel Silva

Yes, the 12-speed group 105 di2 is compatible with the 12-speed Ultegra di2

Shimano Ultegra Di2 11-speed and Shimano Di2 12-speed (chainrings) compatibility

2022/12/04

José González Sánchez

Is the 12-speed R8100 crank compatible with the 11-speed Shimano Di2 group (chain, gearbox, case, levers?

Answer of Erclan Team SL

Apparently it works, but the chain/chainrings may suffer more wear as the chains are of different thicknesses

Request

2022/11/14

Marco

Hello I would like to mount R8100 12v 52/36 instead of my Dura ace 53/19 11v they are compatible thanks for your availability

Answer of João

Hi, yes it is compatible!

Can I install these chainrings in a ultegra group of 11v

2022/09/22

VICTOR SANCHO ALVENTOSA

Can I install these cranks and replace them with the ones I have shimano ultegra R8000 11v?? It would give me problems with the chain width as one group is 11v and the other is 12v

Answer of ANTONIO

No problem with string width

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Shimano Ultegra R8100 12s Hollowtech II crankset

Features of Shimano Ultegra R8100 12s Hollowtech II

Shimano - Bike parts - Cranks

Specifications Shimano Ultegra R8100 12s Hollowtech II

Features of Shimano Ultegra R8100 12s Hollowtech II

Color Black

Recommended Use Road Cycling

Product Type Sets

Product description of Shimano Ultegra R8100 12s Hollowtech II crankset

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What our customers are saying about Shimano Ultegra R8100 12s Hollowtech II crankset