Shimano Ultegra FC-R8100 Crankset - 172.5mm | 50/34t
What Is the Shimano Ultegra FC-R8100 172.5mm Crankset and Who Is It For?
The FC-R8100 172.5mm is the longest arm option in Shimano's current 12-speed Ultegra crankset lineup, built on Hollowtech II hollow forged arm construction for the same stiff, lightweight platform that delivers Dura-Ace R9200-comparable front shifting performance. The 172.5mm arm length is suited to taller cyclists, typically those over 5'11", and to riders who prefer a longer pedaling arc for power delivery or have historically ridden 172.5mm and have their fit dialed around that length. The crankset is engineered for 12-speed with revised Shimano 12-speed chainring profiles and spider geometry that optimize chain wrap and front shift precision for use with the FD-R8100 or FD-R8150 Di2 front derailleur and 12-speed chains. The 50/34t compact chainring configuration on this variant provides a slightly easier gear spread than the 52/36t option, suited to more varied or hilly terrain.
The FC-R8100 uses a press-fit bottom bracket interface compatible with the SM-BBR60 threaded English bottom bracket or equivalent adapters depending on frame specification. The right crank integrates the chainring spider and outer chainring as a unified assembly, with the inner chainring mounting independently to the spider. Crank arm length selection is biomechanical, and the 172.5mm option is the correct choice for riders whose fit data or current ride comfort confirms this length. For taller road cyclists or anyone building a complete Shimano 12-speed Ultegra drivetrain who rides 172.5mm cranks with a 50/34t chainring, this is the right specification.
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Shimano Ultegra FC-R8100 Crankset - 172.5mm | 50/34t
Shimano Ultegra FC-R8100 Crankset - 172.5mm | 50/34t
What Is the Shimano Ultegra FC-R8100 172.5mm Crankset and Who Is It For?
The FC-R8100 172.5mm is the longest arm option in Shimano's current 12-speed Ultegra crankset lineup, built on Hollowtech II hollow forged arm construction for the same stiff, lightweight platform that delivers Dura-Ace R9200-comparable front shifting performance. The 172.5mm arm length is suited to taller cyclists, typically those over 5'11", and to riders who prefer a longer pedaling arc for power delivery or have historically ridden 172.5mm and have their fit dialed around that length. The crankset is engineered for 12-speed with revised Shimano 12-speed chainring profiles and spider geometry that optimize chain wrap and front shift precision for use with the FD-R8100 or FD-R8150 Di2 front derailleur and 12-speed chains. The 50/34t compact chainring configuration on this variant provides a slightly easier gear spread than the 52/36t option, suited to more varied or hilly terrain.
The FC-R8100 uses a press-fit bottom bracket interface compatible with the SM-BBR60 threaded English bottom bracket or equivalent adapters depending on frame specification. The right crank integrates the chainring spider and outer chainring as a unified assembly, with the inner chainring mounting independently to the spider. Crank arm length selection is biomechanical, and the 172.5mm option is the correct choice for riders whose fit data or current ride comfort confirms this length. For taller road cyclists or anyone building a complete Shimano 12-speed Ultegra drivetrain who rides 172.5mm cranks with a 50/34t chainring, this is the right specification.
Original: $328.99
-70%$328.99
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Description
What Is the Shimano Ultegra FC-R8100 172.5mm Crankset and Who Is It For?
The FC-R8100 172.5mm is the longest arm option in Shimano's current 12-speed Ultegra crankset lineup, built on Hollowtech II hollow forged arm construction for the same stiff, lightweight platform that delivers Dura-Ace R9200-comparable front shifting performance. The 172.5mm arm length is suited to taller cyclists, typically those over 5'11", and to riders who prefer a longer pedaling arc for power delivery or have historically ridden 172.5mm and have their fit dialed around that length. The crankset is engineered for 12-speed with revised Shimano 12-speed chainring profiles and spider geometry that optimize chain wrap and front shift precision for use with the FD-R8100 or FD-R8150 Di2 front derailleur and 12-speed chains. The 50/34t compact chainring configuration on this variant provides a slightly easier gear spread than the 52/36t option, suited to more varied or hilly terrain.
The FC-R8100 uses a press-fit bottom bracket interface compatible with the SM-BBR60 threaded English bottom bracket or equivalent adapters depending on frame specification. The right crank integrates the chainring spider and outer chainring as a unified assembly, with the inner chainring mounting independently to the spider. Crank arm length selection is biomechanical, and the 172.5mm option is the correct choice for riders whose fit data or current ride comfort confirms this length. For taller road cyclists or anyone building a complete Shimano 12-speed Ultegra drivetrain who rides 172.5mm cranks with a 50/34t chainring, this is the right specification.
