Shimano Ultegra FC-R8100 Crankset – 12-Speed Hollowtech II

$329.99 AUD

Taxes included. Shipping calculated at checkout.

The Shimano Ultegra FC-R8100 crankset delivers premium 12-speed road performance, combining efficient power transfer, low weight, smooth front shifting and excellent long-term reliability, making it a smart upgrade for Brisbane and Australian cyclists wanting near Dura-Ace performance at better value.

FC-R8100 Features

Premium Shimano Ultegra 12-speed road crankset for performance road bikes
Hollowtech II crank arm construction balances stiffness, strength and low weight
Hollowglide chainrings improve front shifting and power transfer
Available in 46/36T, 50/34T and 52/36T chainring combinations
Wide crank length range from 160mm to 175mm for improved bike fit options

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Crank Arm Length (mm) 160 165 170 172.5 175

Chainring Combination 50/34T 52/36T 54/40T

Technical Specifications

Product Name: Shimano Ultegra FC-R8100 Crankset
Model: FC-R8100
Series: Shimano Ultegra R8100
Drivetrain Type: 2x12-speed road
Rear Speeds: 12-speed
Compatible Chain: Shimano HG 12-speed
Crank Arm Technology: Hollowtech II
Chainring Technology: Hollowglide
Chain Line: 44.5mm
PCD / BCD: 110mm
Spider / Gear Arms: 4-arm asymmetric design
Q-Factor: 148mm
Chainring Combinations: 46/36T, 50/34T, 52/36T
Crank Arm Lengths: 160mm, 165mm, 170mm, 172.5mm, 175mm
Average Weight:46/36T: approximately 702g50/34T: approximately 700g52/36T: approximately 711g
Crank Fixing Screw: Included
Colour: Shimano Ultegra series finish
Bottom Bracket Compatibility: Shimano Hollowtech II 24mm spindle bottom bracket systems
Compatible Bike Type: Road bikes, aero road bikes, endurance road bikes and race bikes
Recommended Use: Road cycling, climbing, fast bunch rides, endurance riding, racing and Gran Fondo events
Power Meter: Not included; Shimano FC-R8100-P is the integrated power meter version

Hollowtech II Crank Arm Construction

Shimano Hollowtech II technology uses hollow forged crank arms to deliver an excellent balance of stiffness, strength and low weight. This improves pedalling efficiency, acceleration and climbing response.

Integrated 24mm Spindle

The right crank arm integrates with Shimano’s proven 24mm spindle system, helping maintain stiffness while keeping bottom bracket compatibility simple and reliable.

Hollowglide Chainrings

The Hollowglide outer chainring uses a hollow structure that reduces weight while maintaining rigidity. This helps improve front shifting accuracy, especially under load.

12-Speed Optimised Shifting

The FC-R8100 chainrings are designed specifically for Shimano 12-speed road drivetrains, improving chain engagement, front derailleur performance and overall drivetrain smoothness.

Asymmetric 4-Arm Design

The 4-arm spider places material where it is needed most for pedalling loads, improving stiffness while reducing unnecessary weight.

Available Chainring Options

46/36T

Best for cyclocross-style gearing, junior racing or riders wanting tighter gear spacing
Less common for general road use but useful for specific performance setups

50/34T

Best all-round option for climbing, endurance riding and mixed terrain
Excellent for Brisbane and Queensland riders tackling Mt Coot-tha, Mount Nebo and hinterland climbs

52/36T

Best for faster road riding, racing and strong riders wanting more top-end speed
Ideal for fast bunch rides, criteriums and flatter road events

Available Crank Lengths

160mm
165mm
170mm
172.5mm
175mm

Fit Recommendation

Shorter crank options such as 160mm and 165mm are useful for smaller riders, triathletes, aero-position riders or cyclists seeking improved hip clearance and higher cadence efficiency.

Best Suited For

Road cyclists upgrading to Shimano 12-speed
Ultegra Di2 and mechanical drivetrain riders
Endurance riders
Club racers and fast bunch ride cyclists
Riders replacing a worn or damaged crankset
Cyclists building a premium road bike without Dura-Ace pricing
Brisbane riders searching for Shimano road bike parts or drivetrain upgrades

Bikerumor’s January 2024 long-term review of Shimano Ultegra R8100 praised the groupset for smooth operation, quiet running, reliable shifting and strong durability after extended use.

Cyclists Hub’s updated April 2026 review of Shimano Ultegra R8100 also praised the platform for excellent shifting, braking performance, reliability and long battery life after more than 5,000km of riding.

Hands On Bike’s September 2023 comparison of Dura-Ace R9200 and Ultegra R8100 cranksets highlighted how closely the Ultegra crankset compares to Dura-Ace in construction and overall function, while offering a more accessible price.

Rider Feedback & Community Sentiment

Rider feedback around the FC-R8100 crankset is generally very positive.

Common positive comments include:

Excellent stiffness under load
Smooth and reliable front shifting
Strong value compared with Dura-Ace
Premium appearance and finish
Proven Shimano Hollowtech II bottom bracket compatibility
Wide crank length options
Reliable long-term performance

Bikerumor’s January 2024 long-term review of Shimano Ultegra R8100 praised the groupset for smooth operation, quiet running, reliable shifting and strong durability after extended use.

Cyclists Hub’s updated April 2026 review of Shimano Ultegra R8100 also praised the platform for excellent shifting, braking performance, reliability and long battery life after more than 5,000km of riding.

Hands On Bike’s September 2023 comparison of Dura-Ace R9200 and Ultegra R8100 cranksets highlighted how closely the Ultegra crankset compares to Dura-Ace in construction and overall function, while offering a more accessible price.