Endurance FB300B Dual Action Fan Bike
The FB300B is a dual action air bike from Endurance, the light commercial line built by Body-Solid. You pedal with your legs and push and pull the handlebars at the same time, and a 27 in. steel fan supplies all of the resistance. It weighs 96.8 lbs. assembled, holds riders up to 300 lbs., and carries a 15 year frame warranty in light commercial use.
Here is the spec most listings bury. The FB300B does not plug in. The console runs on two AA batteries and the resistance comes from a fan, not a motor. There is no cord, no transformer and no outlet to plan around. Add the two transport wheels and you can put this bike anywhere on a floor and move it later without calling an electrician.
Does the FB300B need a power outlet?
No. Two AA batteries run the console, and that is the only power the machine uses. This matters in three real places: a clinic treatment room where every outlet is already spoken for, a garage gym on a single circuit, and a group fitness floor where you want bikes in the middle of the room instead of lined up along the walls.
Four leveling feet sit under the front and rear stabilizers, so an uneven slab is a two minute adjustment instead of a reason to move the bike somewhere else.
Can you train arms only or legs only on it?
Yes, and this is why the bike turns up in rehab and therapy settings. The FB300B has a foot peg on each side of the frame. Rest your feet on the pegs and the handlebars become an upper body ergometer. Hold the handlebars still and pedal, and it is a leg bike. Use both together and it is a full body interval machine.
That is one machine doing three jobs. A shoulder patient can still train legs. A knee patient can still train arms. A rider cleared for full effort can do intervals. Plenty of air bikes at this price have no foot pegs at all, which takes the arms only option off the table.
How does the seat adjust?
Two ways, not one. The FB300B uses a vertical seat post and a separate horizontal seat post, so the saddle moves up and down and also forward and back. Most air bikes only move up and down. That fore and aft travel is what lets a 5 ft. 2 in. rider and a 6 ft. 3 in. rider both get the knee stacked over the pedal spindle instead of settling for close enough.
Both posts use pop pins, so swapping riders between sets takes seconds and needs no tools.
How much resistance does it have?
There are no resistance levels to set. Air resistance climbs with how hard you work, so a deconditioned rider gets a light ride and a trained athlete gets a punishing one out of the same machine with nothing adjusted in between. Power runs through a chain on each side, turning on sealed bearings, into the 27 in. steel fan wheel. The movement arms are 12 gauge steel oval tubing.
The trade off deserves saying plainly. Because resistance follows effort, you cannot dial in a fixed setting and repeat it exactly the way you can on a magnetic bike. If your program calls for the same load every session, work off the watts readout rather than looking for a knob.
What does the console track?
The LCD console shows time, distance, calories, watts, speed, RPM and heart rate. It carries eight quick programs:
- Quick Start, which begins counting as soon as you pedal
- 10/20 interval, eight rounds of 10 seconds on and 20 seconds off
- 20/10 interval, eight rounds of 20 seconds on and 10 seconds off
- Custom interval, where you set the number of rounds and both times
- Target Time
- Target Distance
- Target Calories
- Target Heart Rate
One honest note on heart rate. The console reads heart rate from a wireless chest strap, and the strap is not included in the box. There are no pulse grips built into the handlebars. If you want the Target Heart Rate program to work, budget for a strap.
The console also has a shelf sized for a phone, and it sleeps on its own after 60 seconds without a signal so the batteries last.
See the FB300B in motion
This clip from Body-Solid shows the dual action arms and legs pattern, the fan, and how the machine is used.
Which riders is this bike wrong for?
Fan bikes are loud, and that is not a defect. The resistance is a fan moving air, so the sound rises with the effort. If this bike is going into a shared wall apartment or a room beside a quiet office, expect the noise to become a conversation. It is also rated to 300 lbs., which rules out heavier riders, and it wants clear space behind the fan so the air has somewhere to go.
Common questions about the Endurance FB300B
How long does assembly take?
The manual breaks it into four steps: bolt on the front and rear stabilizers, attach the handlebars and seat, thread on the pedals, then fit the upright and connect the console cable. Body-Solid states that assistance is required, so plan on two people. Most of the machine arrives already built, including the fan, the chains and the crank assembly.
Is the left pedal reverse threaded?
Yes. The left pedal threads on counterclockwise and the right pedal threads on clockwise. This trips up almost everyone assembling a bike for the first time. Both need to be tightened with a wrench, not just by hand, or the threads in the crank arm can strip.
Does it ship in one box?
Yes. One carton measuring 52 in. long by 35 in. wide by 11 in. tall, at 110 lbs. Because the box runs over four feet long, measure your doorway and any tight hallway turn before delivery day. Current shipping and delivery terms are shown in the Shipping card on this page.
What is the warranty?
It depends on where the bike goes. In a home it carries a lifetime frame warranty, 5 years on parts, 2 years on electronics, 1 year on labor and 6 months on wear items. In a light commercial setting the frame is covered 15 years, parts 3 years, electronics 2 years, labor 1 year and wear items 6 months. Full terms are in the Warranty tab on this page.
What is the difference between a fan bike and an air bike?
Nothing. They are two names for the same machine, and you will also hear assault bike and dual action bike. All of them describe a bike where a fan creates the resistance and the handlebars move along with the pedals.
Can one person move it?
Yes. Tip it back onto the two transport wheels at the rear of the frame and roll it. At 96.8 lbs. that is manageable on a flat floor for one adult, though carpet and thresholds are easier with a second set of hands.
Does it still work if the batteries die?
The bike does. The batteries only run the display, so you can ride it with a dead console. You just lose the readouts and the programs until you swap in two fresh AAs.
