Saris H3 Direct Drive Smart Indoor Bike Trainer

With a massive 2000-watt capacity and 20% gradient simulation, the Saris H3 is a direct-drive smart trainer built for serious training sessions. Its electromagnetic resistance unit delivers precise, responsive power measurement within ±2%, while a 5.9 kg flywheel ensures a smooth, realistic road feel.

Overview

The H3 mounts your bike directly onto the unit, removing the rear wheel for a stable, secure fit. It folds flat for easy storage when not in use. Compatible with a wide range of frames and cassettes, it's ready for Zwift, TrainerRoad, Rouvy and more.

What stands out

• Exceptional accuracy: ±2% power measurement
• High-resolution resistance: 2000W max, 20% grade
• Reliable connectivity: ANT+ FE-C and Bluetooth FTMS
• Foldable frame for compact storage
• Wide compatibility: QR and thru-axle, 24"–29" wheels

Technical details

• Maximum power output: 2000 Watts
• Maximum simulated grade: 20%
• Power accuracy: ±2%
• Flywheel weight: 5.9 kg
• Noise level: 59 dB at 32 km/h
• Cassette compatibility: Shimano/SRAM 8–11 speed
• Axle compatibility: 130/135mm QR, 142/148mm thru-axle
• Wheel size: 24"–29"
• Integrated cadence sensor
• Resistance: electromagnetic
• Power: AC adapter (100–240V)
• Foldable design
• Max rider weight: 136 kg
• Firmware updates via Saris App
• Included adapters: 12mm thru-axle, QR end caps

Our verdict

For riders who demand realism and connectivity, the Saris H3 delivers a robust training experience at a competitive price. Its high power ceiling and low noise make it a versatile choice for both sprints and endurance workouts.