X
CLICK HERE to join our Email List and get 15% off your first order*
*Restrictions Apply. Click for details.
X
Signin to Your Account
Questions? Call our tri Specialists! 1-800-445-4790

Crumbs

Product Images

Shimano Ultegra FC-R8100 12 Speed Crankset
Shimano Ultegra FC-R8100 12 Speed Crankset
Shimano Ultegra FC-R8100 12 Speed Crankset
Click to zoom
Shimano Ultegra FC-R8100 12 Speed Crankset 1
Shimano Ultegra FC-R8100 12 Speed Crankset 3
Shimano Ultegra FC-R8100 12 Speed Crankset 2

Shimano Ultegra FC-R8100 12 Speed Crankset

Pricing and Order Section

Mfg PartNum: IFCR8100CX04
(8)
Sale Ends
Thursday
Purchase this popular item
today and save 20%
Earn $5.04 in Podium Club credit. Click to Learn More.
504
POINTS
SALE: $251.99
MSRP: $314.99
SAVE 20%
In Stock Now
This model is not eligible for Podium Club points
Price matches are is not eligible for Podium Club points
Qualifies for Free Shipping!
 

Description

The Epicenter Of Ultegra Power Transfer

The Shimano Ultegra FC-R8100 12 Speed Crankset is built with stiffness, weight, and power transfer in mind. Weighing only around 700g it also has an extremely low rotational weight.

The Ultegra FC-R8100 uses HOLLOWGLIDE for smooth shifting and excellent chain retention along with HOLLOWTECH II technology that stiffens the rotating mechanism, making power transfer more effective.

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 quick, precise front shifting
  • HOLLOWTECH II technology provides the best balance of stiffness, strength, weight and rotating performance
  • 52-36 and 50-34 chainring options. 160, 165, 170, 172.5, and 175 mm crank arm lengths.
  • Average weights: 711g (52-36T) 700g (50-34T)

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Specifications

 

Average weight: 711g (52-36T) 700g (50-34T) 

 

BB_Pressfit: SM-BB72-41B 

 

BB_Threaded: SM-BBR60 

 

BB Shell Width: 70 

 

Compatible chain: CN-M8100 

 

Q-Factor: 148 mm

 

Chainline: 44.5 mm

 

P.C.D.: 110 mm

160mm - 50/34 Tooth

Mfg PartNum: IFCR8100MX04 

160mm - 52/36 Tooth

Mfg PartNum: IFCR8100MX26 

165mm - 50/34 Tooth

Mfg PartNum: IFCR8100AX04 

165mm - 52/36 Tooth

Mfg PartNum: IFCR8100AX26 

170mm - 50/34 Tooth

Mfg PartNum: IFCR8100CX04 

170mm - 52/36 Tooth

Mfg PartNum: IFCR8100CX26 

172.5mm - 50/34 Tooth

Mfg PartNum: IFCR8100DX04 

172.5mm - 52/36 Tooth

Mfg PartNum: IFCR8100DX26 

175mm - 50/34 Tooth

Mfg PartNum: IFCR8100EX04 

175mm - 52/36 Tooth

Mfg PartNum: IFCR8100EX26 

Reviews

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
(7)
(1)
(0)
(0)
(0)
(88%)
(13%)
(0%)
(0%)
(0%)
Performs as expected.
by Steven
Saugus, MA

The Ultegra 12 speed group set is as good as advertised, as long as it is set up correctly you really don�t have to worry about dropping chains or sloppy shifts. I bought the 170mm cranks as it is a better choice for my height of 68.5�, I used both calculations found online for correct crank length. I�ve found it easier to breathe while in the drops compared to the 172.5mm cranks that came with my bike as my legs are no longer contacting my gut. I also believe having the shorter cranks has been good for my hips as well, I was feeling some pain at times from a slight impingement but since using these cranks it hasn�t bothered me. I was slightly concerned about losing some power with the shorter lever but I can still hit my max wattage, I might have to spin slightly faster but it�s not really noticeable.

Reviewed 4/4/2024
Was this review useful to you? Yes/No
Thank you for your feedback.
Works as expected, no complaint
by shiltian
Cycling Enthusiast
Sudbury, MA

Switched from 172.5mm to 165mm. Feels the difference right away. My cadence can indeed improve to some extent. Works as expected, no complaint.

Reviewed 3/12/2024
Was this review useful to you? Yes/No
Thank you for your feedback.
A good, quality product!
by Markparch
Competitive Racer
Midland, Texas

The crankset has a nice finish and a smooth manufactured surface on the cranks and chainrings. This is my first 12 speed product and don't have many miles on the product yet. Installation was easy and once the chain and shifters were calibrated, the crankset operated with little noise and shifted perfectly. I have used Shimano Ultegra on several of my bikes and have had no problems.

Reviewed 11/2/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
Quality crank in a shorter 160mm length
by Anonymous
Midwest

Try a shorter crank length. It�s makes a difference in comfort and no difference in power output!

Reviewed 2/15/2024
Was this review useful to you? Yes/No
Thank you for your feedback.
Great quality crankset
by Lindsay petruk
little rock

I love ultegra crankset, the 165mm is great for my leg length

Reviewed 9/28/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
Love my shimano products. Always reliable.
by Pam
Competitive Racer
TN

I use this crankset on my Factor Ostro Vam road bike

Reviewed 12/1/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
great crankset at a reasonable price
by Anonymous
Cycling Enthusiast
San Diego, CA
1 of 1 customers found this review helpful.

reasonably light, solid performance, decent price, all the same features as the top of the line dura-ace product (with only a small weight penalty, but minus the huge extra cost), and in my subjective opinion, a more appealing aesthetic with the matte rather than glossy/polished finish. overall quite satisfied with the purchase, and would buy again and recommend to others!

Reviewed 4/19/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
Easy installation and setup
by BB in AZ
AZ
1 of 1 customers found this review helpful.

As with all Shimano cranksets, easy to install and adjust Di2. Finish isn't as nice as Dura Ace, but is half the price and works just as well

Reviewed 9/5/2022
Was this review useful to you? Yes/No
Thank you for your feedback.
additional content loading
additional content loading
additional content loading