Cranks are the powerhouse of the bike. They serve as the primary lever arms that transfer the explosive force from your legs into the drivetrain.
Performance-driven racing cranks focus on three areas:
• Stiffness: To reduce energy loss, racing cranks are engineered to be incredibly rigid. They must resist flexing under the massive torque of a standing start.
• Crank Arm Length: Precision is key here; racers choose specific lengths (ranging from 125mm to 180mm) based on their height and leg speed to optimise leverage and cadence.
• Weight vs. Strength: Every gram matters when you’re sprinting. High-end cranks utilise hollow-arm technology to shave weight without compromising the structural integrity needed for heavy landings and high-speed cornering.
Upgrading your cranks is often the most noticeable way to improve the "feel" of your bike.
