Shimano 105 R7100 12-Speed Crankset 50/34T 172.5mm Used Bike Parts

The Shimano 105 FC-R7100 172.5mm 12-Speed Compact Crankset offers a reliable and budget-friendly upgrade for road cyclists seeking professional-grade performance without the premium price tag. Designed for seamless integration with modern drivetrains, this double chainring system features a robust 50/34T combination—ideal for conquering steep climbs during weekend rides or maintaining momentum on flat terrain during endurance training sessions. Whether you’re commuting to work or tackling hilly routes on your next adventure, its asymmetric chainring design ensures precise power transfer while minimizing lateral flex for a responsive ride feel.

Key Specifications
– Chainring Configuration: Compact 50/34T double setup with 110mm Shimano Asymmetric BCD
– Crank Length: 172.5mm (suited for riders between 5’8″–6’2″)
– Spindle System: Shimano Hollowtech II compatible (requires separate bottom bracket)
– Drivetrain Compatibility: Optimized for 12-speed systems across road bikes and e-bikes
– Weight: 766g (lightweight yet durable aluminum construction)
– Pedal Interface: Standard 9/16″ spindle for easy pedal installation

This crankset excels in versatility, supporting both traditional road bikes and e-bikes up to Shimano’s power-assisted standards. The included chainrings show minimal wear—teeth remain sharp and functional—with only minor cosmetic scuffs on the black crankarms, reflecting its history of regular use rather than neglect. Its hollow spindle design reduces rotational inertia while enhancing stiffness, delivering efficient energy transfer whether you’re sprinting through city streets or climbing mountain passes.

Why Choose This Crankset?
| Feature | Shimano 105 FC-R7100 | Ultegra R8100 (New) | SRAM Force eTap AXS |
|————————-|———————-|———————|———————|
| Weight | 766g | 690g | 820g |
| Price Point | Used at ~50% savings | High | Very High |
| E-Bike Compatibility| Yes | Limited | Yes |
| Chainline Precision | ±0.2mm | ±0.1mm | ±0.3mm |

Perfect for riders prioritizing value and durability over absolute lightweight, this pre-owned crankset provides the same performance advantages as newer models at a fraction of the cost. The compact gearing makes it an excellent choice for hilly terrain or daily commutes where versatility matters most. Its proven Shimano Hollowtech II platform ensures compatibility with existing setups while maintaining smooth shifting and reliable pedal engagement across varied riding conditions.

For road cyclists aiming to elevate their drivetrain without compromising budget or performance—and e-bike riders seeking a trusted upgrade—this FC-R7100 crankset delivers exceptional value in a battle-tested package.