DMASUN Indoor Cycling Bike Review
DMASUN Exercise Bike Overview
The DMASUN indoor cycling bike is a consumer-grade exercise bike suitable for using at home. It has a stable and durable frame and crankset to withstand frequent training and hard workouts. It comes with a 40-lb flywheel, friction resistance, and a digital LCD display that tracks time, distance, speed, calories, and pulse. The DMASUN indoor cycling bike comes in an understated black with subtle red accents design that blends in well with most interiors. The DMASUN has a typical spin bike triangular profile, with thick steel tubing coated with a matte black paint that gives a first impression of durability and looks like it offers a good resistance to scratches and corrosion. The flywheel has a shiny chrome finish. The non-metallic parts like the integrated tablet holder, drive system and brake cover and of the bike are made from tough ABS plastic. DMASUN claims that every unit goes through a 138-cycle test before it leaves the factory to ensure a high level of production quality.
- Q-Factor: NA
- Pedals: Metallic with toe cages
- Flywheel: 40 lbs
- Resistance: Friction
- Transmission: Belt
- Weight capacity: 330 Pounds
- Height capacity: 5’0″ and 6’4″
- Bike weight: 95 lbs (43 kg)
- Bike dimension: 41.35 x 21.67 x 46.16 inches;
- Box dimension: NA
- Monitor: Single button, scan mode. No backlight.
- Connectivity: None
- Applications: None
- RPM tracking: No
- Speed tracking: Yes
- Watt tracking: No
The DMASUN indoor bike is fairly heavy in its fully assembled form. Its mass makes it a very stable bike to use, especially for larger users. Speaking of user weight, the DMASUN is rated for a maximum rider weight of 330lbs (approximately 150kg), and larger cyclists will be able to pedal out of the saddle for more vigorous training sessions without worrying about having the bike move or tip over. The DMASUN has two small wheels attached to the front of the base tubing, allowing it to be easily moved by tilting the bike forward so that the wheels contact the floor for rolling the bike over to where you need it to be.
In terms of dimensions, the DMASUN is actually fairly compact at 41.35in (105.7 cm) long and 21.67in (55cm) wide, which would make it a good option for smaller houses or apartments where space could be scarce. The base tubing has four independently adjustable stabilizers which allows the user to setup the bike for use on a floor that is not perfectly level. There is a bottle cage included that conveniently attached on the top tube of the frame, just below the tension adjustment knob, allowing users to keep a water bottle at arms lengths to easily replenish hydration during hard workouts.
Digital LCD Monitor:
The DMASUN indoor spin bike comes with a digital exercise LCD monitor than tracks time, distance, speed, calories burned and pulse (via the EKG sensors integrated in the handlebar). You can scroll through the displayed data by using the single button located in the centre of the unit. There is also a scan mode which periodically cycles between the different metrics without having to press the button. The unit will enter a power saving mode after several minutes of inactivity, and will automatically power up as soon as you start pedaling. It requires two AAA batteries.
There are a few drawbacks to the Digital LCD monitor on the DMASUN, but they are to be expected at this price point. Firstly, there is no Bluetooth connectivity for using your own heart rate monitor. Secondly, the LCD screen is not backlit which makes it hard to read in a dimly lit room. Finally, the screen only allows one line of data to be shown, so it can get annoying having to scroll through several screens to get to the one you need, even with the scan function.
Pedals and Q-factor:
The DMASUN spin bike comes with a set of metallic pedals with toe clips and standard 9/16″ threads. The toe clips (cages) are adjustable to suit different feet sizes. The pedals do not have an SPD (clip-in) option, but since the crankset on the DMASUN uses a standard thread, users can easily swap out the included pedals for their favourite pair. It is not clear from the listed manufacturer specs what the Q-factor measurement on the crankset is.
Some users have reported that the included pedals have a shoddily finished sharp edges that may pose a hazard during use. It is unclear how common this issues is with the DMASUN units shipped out to buyers, but if you buy one it might be good to quickly check for those sharp edges and use a file to smooth them out before use.
Flywheel and Resistance:
Th DMASUN indoor cycle also features a 40 lbs (18 kg) flywheel, which is fairly standard for indoor bikes in this price class. The flywheel allows forward and backward pedaling at the same resistance. The flywheel has a brake guard for safety.
The DMASUN has a manually-adjusted friction resistance system. The resistance is adjusted by means of a tension knob. Turning the knob clockwise increases the amount of drag (i.e. friction) applied by a wool felt brake pad to the flywheel, which results in needing to apply more force to the pedals to maintain a given speed.
The tension adjustment as an infinite resistance adjustment, which means that there are no pre-set resistance levels built into the system. You simply turn the knob clockwise to increase and anticlockwise to decrease the resistance. Pressing down the knob also acts as a brake to bring the flywheel to a stop.
Handlebars and Seat:
The DMASUN indoor cycling bike featured handlebars with a multi-grip design, with options for full drop bar style (similar to road bikes) positions, “bullhorn” style grips that come standard on most spin bikes as well as a middle position that mimics the “aero” position on time-trial bikes. Heart rate sensors are integrated in the top grip area, and the pulse readout can be observed on the digital LCD display. The height of the handlebars is also adjustable between 38in up to 48in. The handlebars are coated in a rubbery material that allows a good tactile feel and solid grip even with sweaty hands, and comes with an integrated tablet holder for those who want to use their own devices for entertainment while exercising or to use one of the popular spin bike apps.
The generously padded saddle has a synthetic cover and double-stitching for durability. The saddle also has an extra-large seat pad measuring 10.86″ (27.6 cm) x 8.12″ (20.6 cm) x 2.56″ (6.5 cm) (L x W x H) and has a central channel which adds to comfort during long and intense training sessions. The attachment system allows four-way adjustability and the adjustment range is wide enough to ensure that it will comfortably suit riders of different heights. The saddle rail clamp also allows for a few degrees of fore and aft tilt. The saddle can be swapped out for another if a replacement is needed or if you have a favorite saddle.
Some users have reported that the maximum height of the seat post is not height enough for very tall people (or people with a particularly tall inseam). A similar issue exists with the handlebars having no fore/aft adjustment, which may pose a fit issue for users of shorter stature. There are also some reports of the saddle clamp being a bit fiddly, and requiring frequent tightening to prevent it from coming loose, especially if the bike is used often.
The DMASUN spin bike comes with a belt drive system, which offers a smooth pedaling motion. Belt drive transmissions also do not require frequent maintenance or lubrication, and do not generate as much vibration during as chain drive systems typically do.
Price, Warranty, Assembly and Shipping:
The DMASUN exercise bike price is currently priced at $350 and it comes with a 12-month warranty. Out of the box, the DMASUN spin bike’s frame is mostly pre-assembled from the factory.
The process of completing the assembly is rather simple. There is a handful of bolts used for fitting the front and rear base bars, the sat post, the handlebar and handlebar post, the pedals and finally the display unit. The necessary tools are even included in the box. The DMASUN does not need any extensive mechanical knowledge for assembly and it comes with a clear instruction manual. It would take most people between 30-45 minutes to fully assemble the bike and have it ready for use.
Once assembled, the DMASUN does not need much periodic maintenance aside from making sure that all parts are well assembled and nothing is coming loose. As previously mentioned, belt drive systems do not require lubrication. While lubrication isn’t needed on a belt drive system, friction resistance type bikes often require that a silicone-based lubricant to be periodically applied to the brake pad to prevent excessive noise. Some users have reported a strong odour coming from the flywheel when higher resistance is applied, and the culprit would most probably be the heat build-up between the felt brake pad and the flywheel with lack of lubrication.
DMASUN Indoor Bike Pros:
- Comes with a mostly pre-assembled frame with tools included to complete the assembly process.
- Robust frame supporting cyclists up to 330 lbs and compact dimensions that fits in smaller spaces
- Transport wheels on front base bar for easy transport and storage
- Independently adjustable stabilizers allowing to be used on a floor that is not perfectly level
- Included water bottle cage
- Multi-grip handlebars with included tablet holder
- Comfortable well-added saddle with four-way adjustability
- Digital exercise display included with ability to track time, distance, speed, calories, and pulse.
DMASUN Indoor Bike Cons:
- Included pedals do not have an SPD option (for spinning shoes you can purchase dual-sided pedals separately).
- Friction resistance can become noisy as parts wear after some use.
- The digital LCD display is not backlit and does not have Bluetooth compatibility for using heart rate monitors or to synch with spinning applications.
- The digital LCD display shows only one metric at a time (also there is no RPM reading).
The Final Verdict
The DMASUN spin bike is certainly a well-rounded option if you’re in the market for a new exercise bike, but at $350 at the time of writing this review we can’t recommend it due to its outdated friction resistance system. Unlike magnetic resistance, friction resistance wears out after a while so you need to replace it. It can also be noisy as parts wear over time. A Magnetic system doesn’t is super quite due to the lack of contact between the resistance element and the flywheel. Additionally, friction resistance systems are not as smooth as magnetic resistance. For this price point, our recommendation would be the Maxkare indoor bike and KOUZ Live indoor bike.
At the time of writing this review, the DMASUN exercise bike is priced at $350. While this price isn’t much above the average price point for home-use spin bikes with a similar set of features, the availability of magnetic resistance spin bikes like the excellent KOUZ Live (which are superior to the friction resistance system on the DMASUN) at a very similar price point makes them a more attractive choice. Read on the rest of this review to get to know all the features the DMASUN spin bike has to offer.