Shimano Ultegra FC-R8100 12-Speed Crankset 50/34 / 170mm
ULTEGRA's new FC-R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms. HOLLOWTECHA lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. HOLLOWTECH IIThe addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.
ULTEGRA's new FC-R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms. HOLLOWTECHA lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. HOLLOWTECH IIThe addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.
Last updated at 28/06/2026 12:52:07
Shimano FC-R8100 12-Speed Ultegra Crank 170mm / 50-34T
Free delivery
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originally posted on pushys.com.au
5 star as to the purchase and delivery. performance cannot be judged yet
originally posted on bikeinn.com
Stunning view and quality. Fast delivery from bikeinn
originally posted on cambriabike.com
After searching all over for a 165mm Ultegra crank, I stumbled across Cambria Bike. Having never heard of them before (being on the East Coast), I called them up to confirm what I was seeing their site, to what was actually in their inventory. The staff was knowledgeable and helpful, they assured me that if it says "available" online then its in stock. I placed my order and within 8 hours my part shipped.. I was riding 3 days later! Excellent service and great customer support! Ill be buying again from Cambria
| Q-Factor | 148mm |
| Chainline | 44.5mm |
| Drivetrain Speeds | 12-Speed |
| Teeth | 52.36t, 50.34t |
| Speed | 12 Speed |
Shimano FC-R8100 12-Speed Ultegra Crank 170mm / 50-34T
Free delivery
Shimano Ultegra FC-R8100 Front Crankset 50-34
Free delivery between 2–10 July
Shimano Ultegra FC-8100 Crankset 50-34t 170mm
Free delivery between Tue – Fri
Shimano Ultegra Crank 2-speed FC-R8100 50x34 Teeth 170mm Black IFCR8100CX04 NEW
Delivery $29.01
Shimano FC-R8100 Ultegra Front Crankset - 50-34 170MM
Free delivery between Wed – Fri
5 star as to the purchase and delivery. performance cannot be judged yet
Stunning view and quality. Fast delivery from bikeinn
After searching all over for a 165mm Ultegra crank, I stumbled across Cambria Bike. Having never heard of them before (being on the East Coast), I called them up to confirm what I was seeing their site, to what was actually in their inventory. The staff was knowledgeable and helpful, they assured me that if it says "available" online then its in stock. I placed my order and within 8 hours my part shipped.. I was riding 3 days later! Excellent service and great customer support! Ill be buying again from Cambria
The product itself is excellent, but warehouse quality control really dropped the ball. I was quite disappointed when the crankset arrived used (dirt and scratches from prior use) with mismatched R8000 cranks, not 8100. Telephone customer service was excellent and is shipping me a replacement.
This arrived with the box and manual, un-used/open and guarantted original..
Great value over DA. Ultegra is overall best value over other groupsets.
It is the first high end compact crank that Shimano made, for the 10 speed groupset.
Ordered. Arrived very quickly and as advertised. Very Happy with the efficiency.
I’m very happy with my new Chainset thank you sigma
| Q-Factor | 148mm |
| Chainline | 44.5mm |
| Drivetrain Speeds | 12-Speed |
| Teeth | 52.36t, 50.34t |
| Speed | 12 Speed |
ULTEGRA's new FC-R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms. HOLLOWTECHA lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. HOLLOWTECH IIThe addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.
ULTEGRA's new FC-R8100 crank maintains the same quick, precise front shifting and efficient power transfer that Shimano riders have grown accustomed to, but with even more crank arm length options. Spanning 160 to 175 mm in length, ULTEGRA cranks now cater to smaller riders, triathletes, and cyclists curious about shorter crank arms. HOLLOWTECHA lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. HOLLOWTECH IIThe addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design.High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.
in 17 offers
The lowest price for Shimano Ultegra FC-R8100 12-Speed Crankset 50/34 / 170mm right now is $296.99 at Lofti, compared across 17 retailers.
The all-time low was $263.71 on 14 May 2026 — today's price is 13% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 28 June 2026.
