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- USA
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
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Description
Ultegra FC-R8100-POffering all the precision and functionality of the Dura Ace power meter, the Ultegra FC R8100 P power meter comes in a more affordable package. Integrated, waterproof, and rechargeable Li ion battery Up to 300+ hours of ride time. * Depending on ANT+ Bluetooth LE settings Accurate data collection. Software automatically compensates for temperature changes 1. 5% strain gage accuracy throughout the entire calibration range. * Depending on ANT+
- Offering all the precision and functionality of the Dura-Ace power meter, the Ultegra FC-R8100-P power meter comes in a more affordable package.
- Integrated, waterproof, and rechargeable Li-ion battery
- Up to 300+ hours of ride time. * Depending on ANT+/Bluetooth® LE settings
- Accurate data collection. Software automatically compensates for temperature changes
- ± 1.5% strain gage accuracy throughout the entire calibration range. * Depending on ANT+/Bluetooth® LE settings
- Simple zero offset calibration with switch on transmitter
- New pedaling vector function helps you improve your pedal stroke and find increased biomechanical efficiency
- With the new web service SHIMANO CONNECT Lab, your pedal stroke can be analyzed and visualized in more detail than ever before
- HOLLOWTECH II Technology
- Chainrings not included
- BB set not included
Attributes
| BCD | 110 |
| BB Inclusion | No |
| Chainline | 43.5mm |
| Teeth | No Chainring |
| Connectivity | ANT+, BT LE |
| Crank Spindle Diameter | 24mm |
| Interface | Hollowtech II |
| Pedals Thread | 9/16'' |
| Primary Color | Black |
| Speed | 12 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Great reusable moisturizing
Size: Regular, Color: Cream
Love these! Use them often to help moisturize my heels with my favorite moisturizer. Comfortable and easy to use
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Buy these!
Size: Regular, Color: Cream
I only write a review when I have a strong opinion and want to help others decide. I've been having trouble with cracked heels for months. Previously I had just been using regular socks, but these slip-ons have been game changers! They don't make my feet hot at night. They are comfortable and in the morning my heels feel soft, and I don't need to use them everyday. They look good and fit well even if I want to wear them under socks or in shoes during the day. They really do help if you have cracked heels along with some kind of lotion. Definitely effective!
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Reviewed in the United States on May 19, 2025
★★★★★ 5
Cracked heels are gone after 5 applications
Size: Regular, Color: Cream
These moisturizing socks work great. My heels are happy again. The open toe design makes it so my feet don’t overheat at night. It only took 5 times to get rid of my painful cracked heels. Now I wear them 1-2 times a week to keep my heels healthy.
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Reviewed in the United States on January 6, 2026
★★★★★ 4
Really nice but needs a few small improvements
Size: Regular, Color: Cream
Super comfortable and the gel lining feels so nice on my feet. They seem to do their job and help with moisturizing and so far the quality has been great. I deducted a star because they can be difficult to clean and may not fit wider feet. Otherwise a great value for your money
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Reviewed in the United States on December 31, 2025
★★★★★ 5
Perfect socks for cracked heels
Size: Regular, Color: Cream
These are the best for your cracked heels. They still keep their shape and softening power even after washing.
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Reviewed in the United States on January 4, 2026