Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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
4.7 ★★★★★
Based on 469 reviews
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Product Reviews
★★★★★ 5
They are of great quality!
Size: 12-13, Color: Cable Knit Coffee
Love em! After a year and there still Great and warm and Cozy too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 5
Wonderful sock slippers
Size: 12-13, Color: Cable Knit Navy
These are wonderful sock slippers, They are very warm and well made. After reading reviews, I decided to order one size larger (10 to 11) and they are really comfortable big. However, I'm glad I did because they a lot easier to put on and take off. Highly recommended.
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Reviewed in the United States on April 20, 2026
★★★★★ 3
You get what you pay for
Size: 10-11, Color: Cable Knit Black
Comfy but cheaply made. I bought these for the price and expected them to be not the best quality but they are even less than I expected. Please also note that they run small. I got a 10-11 since I wear 11 shoe and Amazon recommended this size. I think a size larger would have been better. Not worth returning though. I’ll just wear them this winter if they last that long and get a better brand next time.
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Reviewed in the United States on December 25, 2025
★★★★★ 5
I will buy these again.
Size: 12-13, Color: Cable Knit Brown
These are great. They’re warm and comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Great quality!
Size: 10-11, Color: Jacquard Knit Red/Black
Just the best! Comfy! Warm! Great non-slip bottoms! Husbands second pair and will order again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
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