bing tracking image
  1. Bike Trainer Stand
  2. Saris
  3. 650b
  4. 700c
  5. 26 Inch
  6. 27 Inch
  7. 29 Inch
Saris Fluid² Bike Trainer - Fluid Resistance

Saris Fluid² Bike Trainer - Fluid Resistance

Item # SA9904T
Our Price: $239.99
You Save: $90.00
Bike Trainer Stand
This item qualifies for Free Shipping
Shipping Weight: 21 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
Designed for the advanced cyclist, this fluid trainer is perfect for frequent indoor rides. Resistance is based on pedal speed, resulting in a more realistic ride than a magnetic trainer can provide. 1-636-306-4830 to order Saris bike trainer stand part number SA9904T or order online at Free expert support on all Saris products. Guaranteed Lowest Price and Fastest Shipping for Saris Fluid² Bike Trainer - Fluid Resistance. Bike Trainer Stand reviews from real customers.
  • All Info
  • Reviews (6)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Saris Bike Trainer Stand - SA9904T

  • 650b
  • 700c
  • 26 Inch
  • 27 Inch
  • 29 Inch
  • Bike Resistance Trainers
  • Progressive Resistance
  • Virtual Training
  • Fluid Resistance
  • Saris
  • No Watt Measurement

Designed for the advanced cyclist, this fluid trainer is perfect for frequent indoor rides. Resistance is based on pedal speed, resulting in a more realistic ride than a magnetic trainer can provide.


  • Fluid trainer lets you ride your bike anytime, regardless of weather, time, or traffic
    • Progressive resistance curve increases the faster you pedal
  • Turbine oil encased inside the cast-aluminum shell creates resistance
  • Precision-balanced flywheel creates real-world biking experience
    • Built-in fan keeps fluid cool, so it won't overheat and leak onto your floor
  • Clutch knob adjusts roller to perfectly fit against rear tire
    • Clicks when optimal tension is reached
  • Included quick-release skewer secures most road and mountain bikes to the trainer
    • Thru-axle skewer (sold separately) accommodates 142-mm x 12-mm and 148-mm x 12-mm bikes
  • Lightweight steel frame folds for easy transport and storage
    • Adjustable feet keep trainer level on uneven surfaces
  • Speed sensor (sold separately) lets you train with Zwift, Rouvy, and other virtual apps
  • Trainer Tire (sold separately) helps prevent excess wear on back tire
  • Made in the USA


  • Application: 650b, 700c, 26", 27", and 29" wheels
    • Fits 29" wheels up to 2.25" width, depending on tire tread
  • Rear dropout spacing: 120-mm, 130-mm, 135-mm
  • Noise level: 69 db at 20 mph
  • Weight limit: 300 lbs
  • Lifetime warranty

Bike Trainer with Fluid Resistance

Saris fluid trainer with resistance

The Fluid trainer has a progressive resistance curve which simulates riding outdoors. It gets progressively more difficult the faster you pedal, keeping the power curve consistent. As a result, the trainer has a smoother road-like feel than a magnetic trainer. You can also manually switch gears to make your ride easier or harder - just like in the real world.

Precision-Balanced Flywheel

Saris aluminum roller with resistance

The Fluid trainer features a precision-balanced, zinc-alloy flywheel. This large flywheel helps create the same inertia riders experience on the road when accelerating. This results in a more realistic ride when compared with smaller flywheels. The flywheel keeps spinning even when pedaling has stopped to simulate coasting.

Turbine oil encased inside a cast-aluminum shell creates resistance. As pedal speed increases, the fluid becomes hotter. A fan built into the flywheel channels the air intake to cool the fluid so it won't leak out of the casing and stain your floor.

Available Accessories

Saris virtual training

To experience virtual training, you can connect a speed or cadence sensor (sold separately) to a Bluetooth or ANT+ adapter (sold separately) and train with Zwift, Rouvy, and other training apps. View your ride on your laptop, your smartphone, or in front of your big screen TV. This will give you the benefits of a full bike workout coupled with the excitement of riding real bike routes. Stream thousands of virtual routes from all over the world, or race against other competitors.

Saris training tire

Tire tread does not wear the same on the trainer as it does in the real world. Frequent riders will find that the tread on their back tire wears down much quicker on the roller due to the added friction. Most outdoor tires are not designed to handle that kind of heat. The trainer tire (sold separately) is made of rubber with a durometer higher than that of a traditional road tire. It's built to handle higher temperatures and will save your rear bike tire from premature tread wear.

Saris NFinity Platform for bike trainers

The NFinity Motion platform compliments your bike trainer by creating a natural movement that's easier on your body than using your trainer alone. Just secure your trainer on the platform and you're ready to go. Because it moves forward, backward, and side-to-side, it creates the same motion your bike has when you shift your body weight. This natural movement provides a more comfortable and realistic ride. Additionally, it engages your core muscles, so you can tone your abs while you ride.

Saris training mat

The trainer mat keeps sweat and bike grime off your floor. It's made of PVC foam that absorbs vibration, keeping your ride quiet.

Saris climbing block

A climbing block (sold separately) can be placed under your front wheel to keep your bike level or offer 2 levels of steepness that simulate riding uphill.

Saris training mat

The trainer desk provides a place to put your water bottle, laptop, phone, and anything else you might need for your ride. It also has an integrated power strip, so you can keep all your devices powered.

9904T Saris Fluid² Bike Trainer

Replaces Saris CY9904

California residents: click here

Video of Saris Fluid² Bike Trainer - Fluid Resistance

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Saris Bike Trainers - Fluid Resistance Trainer - SA9904T

Ellen: Hey, everyone. I'm Ellen here at and today we're taking a look at the Saris Fluid turbo bike trainer. In the winter months it's a lot of times easier to train indoors rather than having to deal with the weather outside. The days are getting shorter, so you move your training sessions to indoors. This is going to help you to stay fit, to stay in shape so that whenever spring does come back around, you're ready to go. You haven't lost any of that progress from those summer months.So, this is going to be a fluid style trainer.

It's a bit of an improvement over the magnetic style. It gives you a more realistic road feel. It's typically also going to be quieter than those magnetic style trainers. The way that it's going to work, we'll have our fluid in this capsule here. There's a fan inside that pushes through that viscous fluid, so the faster you peddle, the harder it gets to get through that, and it's a progressive style resistance trainer.

You'll set your back wheel of your bike on this flywheel here and that's going to provide that resistance for our bike. It's pretty simple to set this up. We'll have our skewer going here and it's going to fit several different styles or several different sizes, road bike and mountain bike tires. I'll give you some numbers to look at in a minute. And it is pretty compact.

Whenever you fold this down, these two arms do fold in, so it makes it pretty easy for apartment living, for keeping this out of the way, making it pretty portable as well.As far as the sound with this, it's rated at about 64 to 68 decibels, which is about the same volume that you would typically have a normal conversation with somebody. Once it gets up into the 70 decibel range, then that starts getting like whenever you're driving at 60 miles per hour on the highway. That's about the level of noise there, just to give you an idea of what those decibels mean, so relatively quiet. Some of your more direct drive trainers will be a little bit quieter than that still. This is kind of that middle of the road trainer, something that's a little bit better than your magnetic style, but not so expensive as some of the fancier ones out there.

Still going to be able to give you that capability to train and keep it a little bit quieter so you can watch your favorite show, maybe listen to some music, or just not annoy your neighbors or your partner while you're training.This is available with a speed sensor as well. If you want to get that version, you can find that here at It's just going to be this little guy which can mount to your hub or the pedal. You just want to make sure that it's not on the drive pedal, so on the crank arm there, and it comes with three different size bands. To get that attached, we'll have a smaller one, kind of middle of the road, and then a larger one so you could attach that in place. It also comes the battery to power that in your pack so you can keep track of how fast are your intervals as you're going along. That way, you get more feedback from your training and you get a little bit more precise work at with that. Again, there's going to be two versions of this. One is available with the sensor, one is available without. All the other features of the actual trainer are going to be the same. It's just that one comes with that extra bonus piece.As far as numbers, I promised you numbers, so let's take a look at those. Whenever it's folded out like you see it now, it's going to measure 30 inches wide by 17 and a half inches tall up to this handle here. That's going to be our adjustment to get our skewer in place, and then about 22 and a half inches front to back for the depth there. If we fold it down, just going to push on these arms. It does have a pretty stable base just folded out there, but there's nothing really to push in. It just folds down. And then if we look at it like this, that's where we get that a 20 and a half inches by 11 and a half going from the base to the top of that fan, and then 19 inches front to back. So, relatively compact so that you can fit into a closet, throw in your trunk if you're taking this out to the race to warm up with it, anything like that.As far as the wheel sizes that it's going to fit, you can see those listed on the screen there. Also, the skewer sizes that are compatible with this unit. There are some accessories available with this. You can see those there. You can get a leveling block for that front wheel so you can make sure that everything's leveled out so you're not tipped forward all the time. It also helps to give you a little bit more stability as well. And you can also get the trainer tire so you're not wearing your back tire too much as it rides along that. It does have a nice machined flywheel here, so it shouldn't cause too much wear. Just kind of depends on how often you're using it. If you're going to be using this every day, it's a good idea to get that trainer wheel, that way you have something a little bit more durable that's made for sitting on there.As far as the adjustment, to get that bike wheel in place, you can adjust the placement of the back flywheel so you can get that up. You're not relying just on the weight of your bike and yourself to weigh that down so you can get that dialed in a little bit back there, which is kind of a nice feature. It does have a limited lifetime warranty. It is also compatible with CycleOps Virtual Training and you can also again get all the additional features from that little speed sensor. So, I'm trying to read and talk at the same time. So, pretty easy to use and should give you a good training session in those cold months instead of losing all that progress that you made in the summer. That's going to do it for me and looking at these Saris Fluid turbo bike trainer. I hope this video has been helpful in deciding if this is going to be the right trainer for you. If not, we do have other versions available here at, so check them out. Thanks for watching.

Customer Satisfaction Score:

Customer Reviews

Saris Fluid² Bike Trainer - Fluid Resistance - SA9904T

Average Customer Rating:  4.3 out of 5 stars   (6 Customer Reviews)

Designed for the advanced cyclist, this fluid trainer is perfect for frequent indoor rides. Resistance is based on pedal speed, resulting in a more realistic ride than a magnetic trainer can provide.


Well made, but requires a quick release hub. I'm using an older street bike and will have to buy a new wheel.

Works well, solidly built.
Brian F - 11/19/2021


I have riding this for a week and based on the short time experiences, I think the product works great, way better than the models that providing resistance based on the weight of the rider.




Review from a similar Fluid2 in Bike Trainer Stand

Product arrived as described and was fairly easy to set-up. I did a test ride and it will work nicely as an alternative to getting out on the road during the bad weather. Looking forward to breaking it in this winter.


Review from a similar Fluid2 in Bike Trainer Stand

This bike trainer is AMAZING! I think I actually might like it more than riding outside! I'm still able to get a great workout, and I don't have to worry about traffic. It's absolutely worth the money!


Review from a similar Fluid2 in Bike Trainer Stand


See what our Experts say about this Saris Bike Trainer Stand

Do you have a question about this Bike Trainer Stand?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate bike trainer stand information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.