The Body-Solid Endurance B4UB is a light-commercial upright bike that fits in a space roughly 4 feet long and 2 feet wide. It carries a 300 lb. user rating, runs 24 resistance levels through 11 programs plus a manual mode, and is covered by a 15 year frame warranty in club use. It ships as one crate and arrives with the main frame already built.
How much floor space does the B4UB really need?
The assembled bike measures 46.7 in. long, 22.4 in. wide and 54.7 in. tall. That is a footprint of about 7.3 square feet, small enough to line several of them along one wall of a therapy room or an apartment fitness room.
Plan on roughly 24 in. of clear space behind the bike so riders can get on and off safely, and about 12 in. on each side. Ceiling height is not a factor because the rider stays seated the whole time.
One note on those numbers. Body-Solid prints three different dimension sets for the B4UB across its own website. The figures above come from the official B4UB product data sheet and match the metric measurements Body-Solid lists beside them, so they are the ones we publish. If you have seen 47 in. or 45 in. quoted elsewhere, that is where the difference comes from.
What do the 24 resistance levels and 11 programs actually give you?
The console holds 11 built-in programs and a manual mode you steer yourself. The programs are Strength, Cardio, Hill, Fat Burn, Interval, Speed Training, Fitness, Watt, Personal, Target Heart Rate and Random.
Resistance spans 24 levels, which means each step up is a small one. That matters more in rehab and beginner settings than a high top end does. Someone rebuilding strength after a knee replacement needs to add load a little at a time, and a bike with only 8 levels forces jumps that are too big.
The LED console reports speed, RPM, heart rate, distance, time, watts and calories. Heart rate reads through contact sensors in the handlebar or from a wireless chest strap. The console stores 5 user profiles, which is worth having when a clinic or a family shares one machine.
See the console and riding position in use
Body-Solid's walkthrough shows the console in operation and the riding position from a few angles, which is the quickest way to judge whether the seat and handlebar setup suits your riders before the crate arrives.
Who is this bike built for?
The B4UB is seated cardio, so it takes nearly all the impact out of the session. That suits physical therapy, senior fitness and active aging programs, apartment and corporate fitness rooms, and home users who want something that will not wear out in two seasons.
It is not a spin bike. Group cycling classes need a heavy flywheel and a fixed gear, and the B4UB has neither. It is also not a recumbent. Riders who cannot swing a leg over a frame, or who need back support to ride at all, are better served by a recumbent bike or a recumbent stepper.
B4UB specifications
| Model |
B4UB |
| Assembled size |
46.7 in. L x 22.4 in. W x 54.7 in. H |
| Assembled weight |
96 lbs. |
| Shipping weight |
108 lbs. |
| Shipping carton |
44 in. L x 37 in. W x 13 in. H |
| Maximum user weight |
300 lbs. |
| Resistance |
24 levels |
| Programs |
11 built-in, plus manual mode |
| User profiles |
5 |
| Console readouts |
Speed, RPM, heart rate, distance, time, watts, calories |
| Heart rate |
Handlebar contact sensors and wireless chest strap ready |
| Power |
120V plug-in |
| Rating |
Light commercial |
What does the warranty actually cover?
Coverage depends on where the bike lives, and the difference is worth knowing before you buy.
In a light-commercial setting such as a gym, a clinic or an apartment building, Body-Solid covers the frame for 15 years, parts for 3 years, electronics for 2 years, labor for 1 year and wear items for 6 months.
In a home, the frame is covered for life, parts for 5 years, electronics for 2 years, labor for 1 year and wear items for 6 months. Wear items means the seat, the brake pad and similar parts that are expected to be replaced over time.
Frequently asked questions
Does the B4UB have to be plugged in?
Yes. It is a 120V plug-in model, so it needs a standard grounded household outlet nearby. It does not generate its own power from pedaling, so the console will not run without power.
Will it fit through a standard doorway?
Yes. The bike is 22.4 in. wide, and a standard interior door opening is 30 to 32 in. It clears upright with room to spare. The shipping carton is wider at 37 in., so unbox it in the garage or driveway if your doorways are tight.
How much assembly is involved?
The B4UB arrives with the main frame already built. You attach the front and rear stabilizers, the seat post and seat, the handlebar, the console and the pedals. Body-Solid does not publish an assembly time for this model, so we do not quote one.
One person can finish the job, though a second set of hands helps when tipping the 96 lb. bike upright. Body-Solid specifically warns that the nylon lock nuts must be wrench tightened rather than finger tightened, or they will not engage properly.
Is a heart rate chest strap included?
No. The console is built to read a wireless chest strap, but Body-Solid does not list one in the box. The handlebar contact sensors work without any extra hardware, and they are accurate enough for steady state riding.
Can I use this in a gym or a clinic?
Yes. The B4UB carries a light-commercial rating, which covers gyms, clinics, apartment fitness rooms, corporate facilities, hotels and schools. It is not rated for a full commercial 24 hour gym floor, where a heavier duty machine is the better call.
Is this the same as a spin bike?
No, and the difference matters. A spin bike uses a heavy flywheel and a fixed gear so you can ride out of the saddle and coasting is impossible. The B4UB is a programmable upright with a seated riding position, a console and 24 resistance levels. If you are outfitting a cycling studio, this is the wrong machine.
How does it ship?
It ships as one carton weighing 108 lbs. Freight delivery is curbside, so plan to have someone available to receive it and help move it inside.
