Shimano 105 FC-RS520 Crankset
Best 12-speed upgrade for road cyclists seeking lightweight, efficient power transfer.
This crankset hits the sweet spot for riders who want pro-level power transfer without the pro-level price tag. By utilizing hollow construction, it sheds significant weight while maintaining the stiffness necessary for aggressive climbing and precise, snappy shifting. It is the ultimate upgrade for those prioritizing efficiency and reliability over pure vanity.
$135.00
at
Marblehead Cycle
Who it's for
- Competitive riders needing efficient power transfer
- Cyclists upgrading to modern 12-speed drivetrains
- Climbers tackling steep terrain on a budget
Who should skip it
- Weight-conscious cyclists seeking performance gains
- Mechanics wanting easy access to aftermarket chainrings
- Aesthetic-focused riders preferring premium finishes
Performance breakdown
Power Transfer
Hollow construction ensures minimal flex during high-wattage sprints and climbs.
Shifting Precision
HOLLOWGLIDE technology delivers crisp, reliable gear changes under load.
Weight Efficiency
Anodized aluminum arms strike a smart balance between durability and mass.
Drivetrain Compatibility
Seamlessly integrates with modern 12-speed road groupsets for smooth operation.
Structural Rigidity
Engineered to withstand intense torque without compromising structural integrity.
Ergonomic Profile
Standard Q-factor provides a natural, efficient pedaling stance for most riders.
Key Specs
Color
Black
Rings
50/34, 52/36
Number of Chainrings
Double
Crank Length (mm)
160, 165, 170, 172.5, 175
Crank Intended Use
Road
Drivetrain Speeds
12
Weight
754
BB Included
No
Pedal Spindle
9/16"
Spindle Interface Type
Shimano Hollowtech II
Still have a question?
Ask Metto anything about the Shimano 105 FC-RS520 Crankset before you decide.
