Smart Trainers

When it comes to indoor bike trainers, the most frequently asked question is: how quiet is it? Taking this to heart, our Madison, Wisconsin-based team put this query under the microscope and set a goal to build a trainer so quiet, that the only sound is that of your drive train.

The result? A direct drive smart trainer that touts a sound specification of 59 decibels at 20 mph. In other words, the H3 is five times quieter than previous generations, making it the quietest smart trainer to ever leave our doors.

Following the Saris direct drive smart trainer legacy, the H3 features the same reliability and durability as its predecessors. Each H3 is made from cast and machined aluminum sourced from America’s heartland. Encased inside are components meticulously calibrated to measure power, speed and cadence, as well as a precision-balanced flywheel - all built to handle 2000 watts and replicate a 20% climbing grade.

Tested to withstand heavy training, the H3’s internal cooling system will keep the electromagnetic resistance system working – and accurate – long after your legs have given out.

Features

• Quieter Than Ever: all new drive system shaves decibels off previous generations.
• Precise Training: +/- 2% power accuracy.
• Controlled and Consistent: electromagnetic resistance provides a measured workout every time.
• Direct Drive Design: widest bike compatibility and eliminates wheel slips.
• No External Sensors Required: measures speed, cadence and power.
• Seamless Integration: connects to indoor cycling apps with dual ANT+ FE-C and Bluetooth FTMS standards.
• Zwift certified.
• Includes one month subscription to Rouvy virtual training app

Specs

• Noise level:59 decibels at 20 mph
• Power measurement accuracy: +/- 2%
• Maximum power output: 2000 watts at 20 mph
• Simulates a 20% climbing grade
• Fast response electromagnetic resistance
• Measures speed, cadence and power – no external sensors needed
• 20 lb precision balanced flywheel
• Integrated dual ANT+ FE-C and Bluetooth FTMS standards
• Built-in front wheel block
• Integrated carrying handle
• Compatible with Shimano 8-11 speed cassettes
• XD/XDR freehubs sold separately 
• Thru-axle compatible for rear hub widths of 142 mm or 148 mm.
• Quick-release compatible for rear hub widths of 130 mm and 135 mm.
• Compatible with a wide variety of devices and indoor cycling applications, including Rouvy, Zwift, TrainerRoad and many more. 
• Headless mode (powered on, not paired to any apps) lets you ride with a progressive resistance curve that matches the Fluid2.
• LED indicator lights communicate connectivity and more.
• Direct drive design directly connects the bicycle to the resistance unit, eliminating tire wear.
• Internal cooling technology ensures accurate ride data even during the hardest of workouts.
• Folding legs provide widest footprint of direct drive indoor bicycle trainers on the market for added stability and easy storage.
• Accessible and balanced handle allows for smooth, anyone-can-carry transit of the trainer.
• Maximum weight (rider and bike): 300 lbs.
• Cassette sold separately.

A SMART TRAINER THAT CHECKS ALL THE BOXES

Looking for a smart direct-drive trainer? FLUX S Smart is the ideal indoor training companion — made to help you sweat while cycling with your favorite apps.

General
Physical dimensions 26.4" x 25.3" (670 x 642 mm)
Weight 

50.3 lbs (22.8 kg)
Height 18.1" (460 mm)
Connectivity
Wireless communication 

ANT+ connectivity, BLUETOOTH wireless technology
Control by 

Smartphone, tablet, ANT+ bike computers, stand alone, computer connection via ANT+ antenna
Read out on 

Smartphone, tablet, bike computer, computer with ANT+ antenna
Indoor Training Features
Magnets 8 permanent ferrite magnets and 8 electromagnets
Electrical requirement 110-240 V
Suitable cassettes 

Shimano and SRAM: 8-11 speed. Campagnolo, SRAM XD and XD-R body (sold separately). Not suitable for specialized SCS system.
Suitable axles 

Width of rear fork: Race 130 mm, MTB 135 mm. Adapters for other widths available.
Max power 1500 watt
Max incline 10%
Max torque 22.1 Nm
Max brake force 65N
Flywheel 15.4 lbs (7 kg)
Mass inertia 50.3 lbs (22.8 kg)
Calibration Spin down
Output Speed, cadence, power
Accuracy <3%

***CASSETTE SOLD SEPARATELY***