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An integral part of Shimano's 12-speed road lineup, the FC-R8100 crank builds upon legendary front shifting and transmission efficiency.
An integral part of Shimano's 12-speed road lineup, the FC-R8100 crank builds upon legendary front shifting and transmission efficiency.
Shimano

Shimano FC-R8100 Ultegra 2x12s 50-34 175mm Crankset in Black

$365.00
Preorder

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritized (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or dispatch to you — it often never even hits the stock room shelves!

Prelaunch

With Prelaunch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Preorders.

So, instead, you can submit your email address for the item you are interested in, and we will email you as soon as stock arrives in the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indicative purposes only and can change at any time without notice.

The dates we provide are based on information given by our suppliers. Whenever we get updated information from our suppliers we will endeavor to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for dispatch to you or collection via Click & Collect on Undetermined

Buy With Confidence

We want you happy! If there's a problem with something you purchased from us we'll do our best to make it right.

Returns


BICYCLES

We spend a lot of time ensuring that each bike we sell is the correct type, size, and fit for every customer, therefore, we take bike returns very seriously.

  • No returns after 30 days.
  • Bicycles purchased within 30 days may be exchanged or traded up for different or like bicycles. A restocking fee of up to 50% of the original value may incur based on the bicycle's condition and it's stocking status in our store.
  • No returns on pre-owned, demo, sale, or closeout bicycles.


PARTS, ACCESSORIES, AND CLOTHING

  • Returns must be made within 30 days of purchase and must include original box and packaging materials.
  • No returns on installed parts or worn apparel. Must have all tags & labels.
  • No returns on pre-owned, demo, sale, or closeout items.
  • No returns on gift card/gift certificate purchases.


NON-RETURNABLE ITEMS

  • Labor, delivery, shipping and/or installation service.
  • Consumable items like food, drink, batteries, CO2 cartridges, etc.
  • Worn/used apparel such as shorts, jerseys, socks, shoes, swimwear, etc.
  • Items that are damaged or abused.
  • Items that are missing manuals, accessories, parts, etc.
  • Custom, etched, or otherwise personalized items such as custom wheels, frames, paint jobs, etc.
  • Opened computer software and GPS units can be exchanged for the identical item but cannot be returned for a refund.
  • Donated items.


Returns: In-Store Purchases

For in-store purchases, Bike Tech will accept returns of any unused item with its original packaging within 30 days of purchase:

  • All refunds on returns require a cash register receipt.*
  • In-store credit will be issued on items being returned without a receipt.
  • Refunds will be issued in the form in which the item(s) was purchased.
  • Cash purchases up to $50 will be refunded in cash.
  • Allow 10 business days for refunds by check or large cash purchases.
  • Credit card purchases will normally be refunded to the same card.
    • Other refunds will be paid by check and mailed from our office.
    • In-store credit is available for all returns.
    • Returns of special orders (for items that we normally do not stock) may be subject to a restocking fee of up to 50% plus actual freight costs incurred. In-store credit may be issued on non-stocking special orders.
    • Bike Tech Gift Cards are good for store credit, but they are not redeemable for cash.

* If you do not have a receipt, we will gladly look up a copy in our system. Even if your name did not appear on the original receipt, we may be able to find it with added details such as date and time of purchase.

Returns: Web Purchases

If there’s a problem with something you purchased from us, you can either bring it to our store or ship it back.

All shipping costs are non-refundable and are the responsiblity of the customer. For purchases with set rate or free shipping, the actual cost of shipping paid by Bike Tech will be deducted from the amount of any refund or exchange. This covers all refunds and all exchanges.

Please ship returns via UPS Ground or insured US Mail (we do not accept CODs). A return authorization number can be obtained by email prior to return..

** Bike Tech reserves the right to deny any return.

For any questions regarding our return policy please email us or call us at (319) 266-5979.

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Manufacturer's Warranty

Please note that manufacturer warranties are separate from the Bike Tech return policy. All replacements and warranty work is to be done at Bike Tech. We are unable to warranty products and services returned to other bike stores.

As with all products purchased from Bike Tech, items covered under the manufacturer's warranty are handled at no cost to the customer with the exception of installation in certain cases.

Products not purchased from Bike Tech but still under manufacturer's warranty can be processed by Bike Tech, if allowed by manufacturer, but will incur a charge for time involved. A proof of purchase will be required.

Shimano FC-R8100 Ultegra 2x12s 50-34 175mm Crankset in Black

Season:2025

Brand:Shimano

Code:IFCR8100EX04

An integral part of Shimano's 12-speed road lineup, the FC-R8100 crank builds upon legendary front shifting and transmission efficiency.

With new refinements for seamless 12-speed shifting, the Ultegra crank brings performance and improved fit for smaller riders, triathletes, and riders with specific biomechanical requirements.

The HOLLOWTECH II technology focuses on producing a superior crankset to maximize power transfer. The rigidity of the crankset ensures pedaling efficiency, while its lightweight design aids in cycling longer distances. The HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.

The HOLLOWTECH crank arm is hollow forged to provide strength and rigidity at a very lightweight, reducing rotating mass to aid in acceleration.

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.
  • Hollow forged crank arms reduce rotating mass to aid in acceleration.
Technical Information
  • Series
    ULTEGRA
  • Rear speeds
    12
  • Compatible chain
    HG 12-speed
  • Chain line (mm)
    44.5
  • P.C.D. (mm)
    110
  • Spider/gear arms
    4
  • Chainring combination
    46-36T, 50-34T, 52-36T
  • Q-factor (mm)
    148
  • Crank arm length (mm)
    160, 165, 170, 172.5, 175
  • Optional chain guard
    Without chain/bash guard
  • Technologies
    HOLLOWTECH II, HOLLOWTECH crank arm, HOLLOWGLIDE
  • Compatible bottom bracket type
    Outboard
  • Recommended bottom bracket
    Threaded (normal) SM-BBR60, Press-Fit SM-BB72-41B
  • Threaded bottom bracket shell width (mm)
    68, 70
  • Crank fixing screw included
    Yes
  • Average weight
    702g (46-36T), 700g (50-34T), 711g (52-36T)
Sizing Information
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