SKU: 48666141779

FC-R8100 FRONT CRANKSET ULTEGRA 52-36

Sale price$198.90 Regular price$221.00
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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

FC-R8100 FRONT CRANKSET ULTEGRA 52-36Description ULTEGRA 8100: Join the Pursuit of Next Level Speed Shimanos new ULTEGRA line up dives into what is ready behind the science of speed with real world applications. Following in the footsteps of the DURA ACE design philosophy, and using many of the same product designs, including the new addition of the 12 speed rear, ULTEGRA is joining the pursuit of next level speed. DURA ACE shared DNA The new R8100 series is designed for those seeking

Description

ULTEGRA 8100: Join the Pursuit of Next Level Speed Shimano’s new ULTEGRA line-up dives into what is ready behind the science of speed with real-world applications. Following in the footsteps of the DURA-ACE design philosophy, and using many of the same product designs, including the new addition of the 12-speed rear, ULTEGRA is joining the pursuit of next level speed.

DURA-ACE shared DNA The new R8100 series is designed for those seeking their next competitive advantage. Sharing the same DNA offering the same incredible performance of the R9200 series across all functions, empowering the rider to take their ride to the next level.

Wireless Simplicity The revised Di2 platform featured on the DURA-ACE series is now standard with the ULTEGRA R8100 series. Making the shifter-derailleur system completely wireless, ULTEGRA still boasts absolute reliability and confidence across the board. Making a wired connection where it still makes sense; sharing a primary battery charging from the rear derailleur, your after-ride experience is almost too easy. The STI shifter buttons are powered by coin-style CR1632 batteries which last for approximately 1.5-2 years of usage.

Shimano’s Fastest Shifting Ever! Sharing the superior DNA, the ULTEGRA Di2 platform also has the improved system design across its electronics. Increasing the processing efficiency between motor, gears and the overall transmission performance enabled the system to reach its fastest speed ever! Better yet, now also keeping your wireless systems even more secure, the new high security, fast-processing, low power consumption proprietary chip sets the new standard.

Smoother Drivetrain ULTEGRA now features two new 12-speed HYPERGLIDE+ cassettes (11-30 and 11-34 ratios) with ramped profiles ensuring quick and shockless shifting and ultimately smoother changes whether changing up or down gears staying on the acceleration.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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SKU: 48666141779

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4.1 ★★★★★
Based on 13 reviews
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Product Reviews
A
Verified Purchase
Aaron Duncan
Fort Morgan, US
★★★★★ 5
Good socks they work.
Size: 2 pairs black L
I normally wear size 13&half to 14 men's, and these fit me ok. They sit just below the ankle. They can get a little tight for me so you should look out for that if you are on the thicker side. But they work as advertised and help moisturize your feet. I recommend wearing them if you're going to just be hanging around home for a bit in one spot as they can be a little slippery to walk in if you go fast. Would not recommend going up and down stairs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 28, 2025
B
Verified Purchase
Brian
Grantham, US
★★★★★ 5
Good socks
Size: 1 pair black L
Good socks
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
A
Verified Purchase
Amazon Customer
Carnegie, US
★★★★★ 3
REALLY unsafe to walk around in these
Size: 2 pairs black L
They do what they are expected to do, but should only be used if you are stationary. The gel base makes for very unstable footing if walking around
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
S
Verified Purchase
Suz
Port Orchard, US
★★★★★ 5
These work
Size: 2 pairs black L
My husband loves these they help his very dry feet. As others have stated they are extremely difficult to walk in so have to be careful but they do work nicely.
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Reviewed in the United States on March 12, 2026
M
Verified Purchase
MW
Waukegan, US
★★★★★ 1
Potential Fall Risk
Size: 2 pairs black L
While these socks do indeed help soften rough skin on your feet, there is a risk of falling while wearing them. Although they have treads on the bottom, which would indicate they’re safe to wear with nothing else, when you put moisturizer on and then wear them your foot can slip inside the sock . This causes you to lose your balance and fall, which happened to me. I’ve thrown them out.
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Reviewed in the United States on October 24, 2024

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