Shimano FC-M8100 Crank Arm
Best lightweight upgrade for dedicated mountain bike trail riders
A reliable replacement for a worn or damaged left-side crank arm. This component restores drivetrain performance and structural integrity without the need to replace the entire assembly.
$121.50
More Deore XT options
Shimano XT M8000 Crankarm
$102.00
Shimano Deore XT FC-M8100-2 Crankset
$280.00
Shimano DEORE XT Crankset
$263.00
Shimano Deore XT M8200 Crankset
$190.00
Shimano XT M8200
$240.00
Shimano Deore XT M8100 Crankset
$279.99
Shimano Deore XT FC-M8130
$153.99
Shimano XT FC-M8130
$185.00
Shimano XT FC-M8130
$185.00
Shimano Deore XT FC-M8100-1
$152.74
Shimano XT FC-M8120-1 Crankset
$185.00
Shimano XT FC-M8000 Crank Arm
$88.99
Shimano Deore XT Crankset
$190.00
Shimano XT FC-M8100 Crank Arm
$135.00
Shimano Deore XT FC-M8200
$190.00
Shimano Deore XT Crankset
$190.00
Shimano XT FC-M8120-1 Crankset
$166.50
Shimano Deore XT FC-M8130-1
$159.99
Shimano Deore XT FC-M8150 E-Bike Crank Arm
$140.00
Shimano Deore XT FC-M8150 E-Bike Crank Arm
$140.00
Shimano XT M8120-1 Crank Arms
$174.99
Shimano Deore XT FC-M8100-1 Crankset
$185.00
Shimano XT M8050 Crank Arms
$89.99
Shimano XT M8150 Crank Arm
$122.79
Shimano Deore XT FC-M8150 Crank Arm
$122.79
Shimano XT FC-M8130-1 Crank Arms
$99.99
Shimano XT FC-M8100 Crankset
$177.33
Shimano Deore XT FC-M8200 Crankset
$190.00
Who it's for
- Performance-oriented mountain bikers seeking efficient power transfer and reduced weight
- Versatile riders who frequently change gearing for varying trail conditions
- High-mileage trail riders needing reliable components that endure heavy abuse
Who should skip it
- Home mechanics who prefer using standard tools for routine maintenance
- Aesthetic-conscious cyclists who want their components to look new indefinitely
- Weight-obsessed racers looking for the absolute lightest possible setup
Performance breakdown
Power Transfer Efficiency
Rigid construction ensures every watt of rider input reaches the drivetrain.
Installation Simplicity
Standardized interface makes swapping out the left arm quick and painless.
Durability Under Load
Forged alloy withstands aggressive trail riding and heavy torque without flexing.
Weight Optimization
Lightweight design keeps rotational mass low for better climbing performance.
System Compatibility
Perfectly matched for seamless integration with existing Deore XT cranksets.
Finish Resilience
Hard-wearing coating resists scuffs and shoe rub during long-term use.
Key Specs
Crank Arm Length
170 mm
Compatibility
Shimano FC-M8100 Deore XT Cranksets
Component Type
Left Hand Crank Arm
Drivetrain Compatibility
12-speed
Know before you buy
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Ask Metto anything about the Shimano FC-M8100 Crank Arm before you decide.
