Smart Bike Trainers Guide: Direct-Drive vs. Wheel-On, Flywheel Inertia & ERG

Direct-drive smart trainers eliminate tire slip, delivering laboratory-grade ±1% power measurement accuracy.

High-mass flywheels (7kg+) replicate outdoor kinematic road momentum across structured ERG-mode threshold workouts.

Section IV: Escaping the ERG Mode Spiral of Death

Overcoming ERG cadence collapse requires an immediate high-torque surge to restore 90 rpm flywheel inertia.