Does the Saris Fluid² Bike Trainer Automatically Increase Resistance as You Pedal Faster?

Published 11/10/2026

Question:

Ive been riding my road bike for a few years now, but once winter hits, I dont get out nearly as much as Id like. Im looking at the Saris Fluid² Bike Trainer SA9907T and noticed it uses fluid resistance instead of magnetic. Im used to changing gears when I hit a hill or want a tougher workout, so Im wondering how this one works. Does the resistance automatically get harder the faster I pedal, or do I have to adjust something on the trainer? Im also curious if it feels anything like riding on the road or more like a stationary exercise bike.

asked by: Brandon

Expert Reply:

Hey Brandon! Yes, the Saris Fluid² Bike Trainer # SA9907T automatically increases resistance the faster you pedal, so it feels a lot more like riding your bike out on the road. Unlike a magnetic trainer where you have to manually select a resistance setting, this one uses fluid resistance that gets progressively harder as you pick up speed. And you can still shift gears on your bike just like you normally would, so there's no need to stop and adjust anything on the trainer.

I think you'll really appreciate how natural the ride feels, too. It has a precision balanced flywheel that helps simulate the momentum you'd feel while riding outdoors, even letting you coast when you stop pedaling. Another nice feature is the included smart speed sensor, which connects through Bluetooth so you can use training apps like Zwift or Rouvy. You even get a free one month Rouvy subscription to try it out. Just keep in mind that the trainer doesn't automatically change resistance to match virtual hills, since that resistance is controlled by your pedaling speed.

Are you mainly looking to keep up with your regular cycling workouts through winter, or are you thinking about trying some virtual rides too?

expert reply by: Heather A