I paid $199 for my DMASUN exercise bike on Amazon, making it probably the least expensive indoor cycling bike I’ve bought. For that price, I honestly wasn’t expecting much, but my first impression while putting it together was better than expected. The metal frame feels substantial, the finish is clean, and all the parts fitted together properly. Assembly took me about 25 minutes.
I used the DMASUN for about a month, with rides ranging from 25 to 40 minutes. Some days I rode it as many as five times, mixing steady cardio with HIIT, standing climbs, and all-out sprints. At 5’5″ and around 170 lb, I never felt the frame shifting or becoming unstable when I got out of the saddle, and the magnetic resistance remained smooth and quiet throughout my testing. I also had no problems with the pedals, which is worth mentioning because I came across complaints about pedal failures on older versions of this bike.
There are definitely compromises at this price. The seat starts getting uncomfortable for me after about 20 minutes, although padded cycling shorts make 40-minute sessions much more manageable. The monitor is also very basic and dark, with no wireless app connectivity, and I wouldn’t recommend this bike to someone much taller than 6 feet. The handlebars fit me well, but a friend who is around 6 feet tall couldn’t get them high enough for a comfortable riding position.
So far, my impression is that DMASUN got the important basics right for a $199 indoor cycling bike: it’s quiet, stable, compact, and the resistance feels smooth. But it’s clearly built to a budget, and its limited rider fit, uncomfortable saddle, and bare-bones monitor are the areas where that lower price becomes obvious. I’ll break down those strengths and weaknesses throughout this DMASUN exercise bike review based on what I experienced during the month I used it.
Who This Bike Is For And Who Should Avoid It
- Buy this bike if: you want a simple, quiet and stable indoor cycling bike for basic home workouts without spending much. It makes the most sense if you don’t need Bluetooth, cadence tracking or advanced workout data and you mainly want a straightforward bike for cardio. The compact size and tablet holder are also useful if you like following online workouts or watching something while you ride.
- Avoid this bike if: you want accurate training data, Bluetooth connectivity or more precise fit adjustment. The lack of cadence and watt tracking, the difference I found between the bike’s speed reading and my Wahoo sensor, and the vertically adjustable handlebars make it less appealing for serious indoor cycling. I’d also look elsewhere if you regularly ride for more than 20 to 30 minutes and want a more comfortable saddle.
My Rating Breakdown (Based on My Testing)
👉 Overall Rating: 4/5
(I’m rating this based on my hands-on testing, ride quality, build, comfort, features, and overall value.)
Table of Contents
DMASUN Exercise Bike Specifications
| Specification | Details |
|---|---|
| Resistance | Magnetic |
| Drive system | Belt |
| Flywheel | 35 lbs |
| Weight capacity | 330 lbs |
| Recommended height | 4’8″–6’1″ |
| Bike weight | 66 lbs |
| Dimensions | 35.8″L × 19.7″W × 40–45″H |
| Pedals | Metal with toe cages |
| Resistance adjustment | Manual |
| Seat adjustment | Horizontal and vertical |
| Handlebar adjustment | Vertical |
| Monitor | Basic LCD, single button |
| Monitor data | Time, speed, distance, calories, odometer, scan |
| Cadence/RPM | No |
| Watts | No |
| Bluetooth | No |
| App compatibility | None |
| Tablet holder | Yes |
| Connectivity | None |
Resistance and Riding Experience
It has a 35 lb flywheel, magnetic resistance, and a belt drive, and throughout my 25- to 40-minute rides the pedal stroke felt smooth, including during faster intervals and standing climbs. I didn’t notice the jerky feeling that lighter, cheaper indoor bikes can sometimes have when you increase cadence.
Resistance is adjusted manually with the knob in front of the rider. There are no numbered levels—you simply turn it clockwise for more resistance and counterclockwise for less. I normally ride with moderate to heavy resistance, especially during climbs, and I never needed to turn the knob all the way to its maximum. Beginners and intermediate riders should have more than enough range for easy cardio, HIIT, and challenging standing climbs. The downside to having no resistance numbers is that you can’t precisely return to a previous setting or easily match resistance callouts from an indoor cycling class.
It’s also an exceptionally quiet bike. My highest reading was around 35 dB during faster riding and sprints, and the magnetic resistance remained smooth without the rubbing noise you get from a friction brake pad. I noticed even less vibration when I put a PVC exercise-bike mat underneath it. The mat also keeps sweat off the floor and is much easier to clean.
Stability was another pleasant surprise. At 5’5″ and around 170 lb, I felt supported when riding out of the saddle and didn’t get any noticeable rocking during hard sprints or standing climbs. I would spend a minute adjusting the levelers before the first ride, though. If they aren’t all firmly contacting the floor, even a sturdy bike can wobble.
The stock metal pedals have adjustable toe cages but no SPD clip-in system. I had no loosening or pedal failures during my month of use, despite seeing complaints about pedals on some older DMASUN bikes. What I did notice was that the grippy teeth on the pedals started pressing into the soles of a lightweight pair of shoes I initially used. Switching to an older pair of Adidas sneakers with thicker soles made a noticeable difference. I wouldn’t use very thin or soft-soled shoes with these pedals. If you prefer cycling shoes, the standard 9/16-inch pedal threads also make it possible to swap the stock pedals for a compatible SPD set.
Comfort, Adjustability, and Rider Fit
The DMASUN’s padded saddle was acceptable for shorter workouts, but I started noticing pressure and discomfort after about 20 minutes. Wearing padded cycling shorts made a clear difference and allowed me to complete 40-minute sessions without the saddle becoming the main focus of the ride. A gel cover or replacement saddle may help some riders, but I didn’t test either, so I can’t say how much improvement they would provide.
The seat adjusts both vertically and forward or backward. At 5’5″, I could position it for proper leg extension and knee alignment without reaching the limits of its adjustment range. For the forward-leaning posture normally used during indoor cycling, the distance between the saddle and handlebars felt fine for me.
The limitation became noticeable when I wanted an easier, more relaxed ride. The handlebars move up and down, but they don’t adjust forward or backward. I would have liked to bring them slightly higher and closer on days when I wanted to sit more upright. Because that isn’t possible, I still had to lean forward more than I would on a traditional upright exercise bike. This didn’t bother me during intervals, standing climbs, or regular spinning workouts, but the DMASUN isn’t ideal if your priority is a relaxed, upright riding position.
The handlebars also have fewer usable riding positions than I would prefer. There is no drop-style or forearm-resting position, although the existing grips worked well for seated and standing riding. Instead of being covered in soft foam, they have a dipped, grippy finish that felt more secure in my hands. I normally wear fingerless cycling gloves for extra comfort and grip, so I can’t judge how comfortable the surface would feel barehanded throughout a long, sweaty ride.
I also asked a friend who is about 6 feet tall to try the bike briefly. He could achieve adequate leg extension with the seat at its highest setting, but there was no adjustment room left, and he wanted the handlebars to go higher. Based on his short fit check, I’d be comfortable recommending the DMASUN to shorter and average-height riders, but I would be cautious if you’re taller than 6 feet or have particularly long legs or a long torso.
Monitor and Features
The monitor is one of the weakest parts of the DMASUN. It’s small, dark, and basic, although I still prefer having it to riding with no feedback at all. It displays time, speed, distance, estimated calories, and total distance through the odometer, while scan mode cycles through the available metrics automatically. There is no cadence or wattage reading.
I compared the bike’s speed reading with my Wahoo speed sensor, and the two didn’t match exactly. The difference wasn’t extreme, but it was enough that I wouldn’t treat the DMASUN’s speed or distance figures as precise training data. I would also consider the calorie number a rough estimate because the monitor doesn’t use my heart rate, body weight, or actual power output in its calculation. The display is adequate for seeing how long you’ve ridden and comparing sessions on the same bike, but not for detailed performance tracking.
There is no Bluetooth, Wi-Fi, or built-in app connectivity. You can follow a class on your own device, but the DMASUN won’t send your speed, distance, or other workout data to that app. The handlebars also lack heart-rate sensors. If you want heart-rate feedback, you’ll need a separate watch, armband, or chest strap, and its readings won’t appear on the bike’s monitor.
The monitor runs on the two included AAA batteries, so the bike doesn’t need to be plugged into an outlet. It wakes automatically when I start pedaling and shuts itself off after inactivity. I didn’t need to replace the batteries during my month of testing, but that isn’t long enough for me to estimate their total lifespan.
Below the monitor is a device holder that securely held my 10.5-inch iPad throughout my rides. It didn’t shift around while I pedaled, making it useful for streaming indoor cycling classes or entertainment. I only tested that iPad size, so I can’t confirm how well every larger tablet will fit.
Assembly and Setup
The assembled bike measures approximately 35.8 inches long and 19.7 inches wide, with its height ranging from around 40 to 45 inches depending on the adjustment. It doesn’t fold, but its small footprint makes it easier to keep in a bedroom, hallway, or compact home-gym space than many full-sized indoor cycling bikes.
The front transport wheels aren’t particularly smooth, especially over carpet, but they work. I could tilt the bike onto the wheels and move it across both tile and carpet without lifting the entire frame. I eventually placed it on a PVC exercise mat, which reduced vibration, protected the tile from sweat, and gave the bike a more permanent, easier-to-clean workout area.
DMASUN Indoor Bike Pros and Cons
Pros
- Good stability — The bike felt stable during my rides and did not move around much when I increased the resistance or stood up to pedal.
- Smooth and quiet — The belt drive and magnetic resistance make the bike quiet enough for home use and the pedaling feels smooth.
- 35-pound flywheel — The flywheel gives the bike enough momentum to make the ride feel more natural than I expected from a bike in this price range.
- Easy resistance adjustment — The resistance knob is simple to use and lets me quickly increase or decrease the workout intensity.
- The tablet holder is useful — I used a 10.5-inch iPad on the bike and it fit well. This is useful if you like following cycling classes or watching something while you ride.
- Doesn’t take up much space — The bike measures 35.8 inches long and 19.7 inches wide, so it doesn’t need a large amount of space.
- Good value for the money — I paid about $199 for mine, and at that price I think the bike offers good value if you just want a basic indoor cycling bike.
Cons
- The seat isn’t very comfortable — After about 20 minutes, I started to feel uncomfortable on the saddle. If you plan to do longer rides, I would probably replace it.
- No cadence reading — This is probably my biggest complaint with the monitor. If you follow indoor cycling workouts, having your RPM would be useful.
- Speed isn’t completely accurate — I compared the speed shown on the monitor with a Wahoo speed sensor and the numbers were somewhat different. I wouldn’t depend on the bike’s speed reading if accurate training data is important to you.
- The monitor is very basic — You get time, speed, distance, calories and odometer readings, along with scan mode. That’s enough for keeping track of a basic workout, but not much more.
- No Bluetooth — There is no Bluetooth connection, so you can’t use the bike as a connected indoor cycling setup.
- The handlebars only move up and down — I would have preferred to see fore and aft adjustment as well. It would make it easier to find the right riding position.
- Not the best choice for taller riders — Because of the limited handlebar adjustment, I wouldn’t recommend this bike for someone over about 6’1″.
- A floor mat is a good idea — I used the bike on both tile and carpet before adding a floor mat. After using one, I felt it was worth having, especially for protecting the floor.
DMASUN Alternatives
JOROTO X4S
If you can spend around $500, I strongly suggest the JOROTO X4S. It’s a better choice if you need a wider range of fit because it accommodates riders from 4’9″ to 6’4″. It also has more handlebar adjustment than the DMASUN, so you have more flexibility when setting up the riding position.
I also prefer the overall design of the X4S, and its backlit display gives you more useful riding data than the basic DMASUN monitor. The difference becomes more noticeable if you regularly follow online cycling workouts and care about keeping an eye on your workout numbers.
I’d choose the X4S over the DMASUN if you have taller riders in the household, need more adjustability or simply want a more refined bike and display.
CHAOKE Bike
CHAOKE Exercise Bike
If you want to stay closer to the DMASUN’s price but would like Bluetooth connectivity, the CHAOKE bike is another alternative I’d consider. The DMASUN is a very basic bike when it comes to connectivity, so the addition of Bluetooth is a meaningful advantage if you want to connect the bike to your phone or tablet and use compatible fitness apps.
This is probably the alternative I’d look at if you like what the DMASUN offers but don’t want to give up connectivity. You’re still shopping in roughly the same price range, but you get Bluetooth, which is one of the main things I wish the DMASUN had.
I wouldn’t necessarily choose it over the JOROTO X4S if budget isn’t a concern, though. The X4S is a more substantial upgrade in terms of fit, adjustability and overall bike design.
My Final Verdict
The DMASUN is a good example of how far you can go with a budget indoor cycling bike. I liked its smooth and quiet ride, stable frame and simple resistance system, especially considering what I paid for it. But the limitations are also pretty clear. The monitor is basic, there is no Bluetooth or cadence reading, the speed isn’t particularly accurate, and the saddle became uncomfortable for me after about 20 minutes. If you’re mainly looking for an inexpensive bike for basic cardio and don’t need connected features, I think the DMASUN is worth considering. That said, there are two alternatives I suggested depending on what you’re looking for, and both may be a better fit for certain riders.
