Reach your fitness goals with the Circuit Fitness AMZ-948BK Revolution Cycle, which provides the same type of workout and intensity found at health clubs with its belt-driven tension and 30-pound flywheel. In addition, you’ll be able to perform cardio exercises to enhance your physical health while conditioning your physique.
The AMZ-948BK features a manual resistance mechanism that lets you adjust your workouts’ intensity according to your preferences. In addition, this gym equipment comes equipped with a 30-pound balanced flywheel combined with a belt drive system, allowing you to experience smooth and consistent operation without noise.
The Circuit Fitness AMZ-948BK Revolution Cycle comes with a 4-way adjustable 2-axis saddle with thick padding that will accommodate most body types. It also comes equipped with a 2-way height-adjustable handlebar, allowing you to set your handlebar’s ideal height for a more comfortable workout.
Learn more in my complete review below!
Product: Circuit Fitness AMZ-948BK Revolution Cycle
Warranty: 2 years limited
My rating: 7.75/10
Affiliate Disclosure: As an Amazon Affiliate Program participant, I earn commissions on purchases made through links in this post. Full disclosure
Details and Specifications
- Assembled dimensions: 41L x 20W x 42H inches (104L x 51W x 107H cm)
- Assembled weight: 84 lbs (38 kg)
- Flywheel weight: 30 lbs (13.6 kg)
- Supported weight: 300 lbs (136 kg)
- Handlebars: 2-way adjustable
- Seat: 4-way adjustable
- Pedals: With straps
- Drive: Belt
- Resistance: Friction, felt-pad
- Fitness Monitor: No
- Accessories: Bottle holder, phone holder
- Warranty: 2 years limited
AMZ-948BK Frame Construction
The Circuit Fitness AMZ-948BK Revolution Cycle is for spin workouts. Even though it’s not a commercial-grade model, it still has a sturdy steel frame and offers a weight limit of 300 lbs (136 kg). In addition, most frame tubes are rectangular, except for the round base bars.
All the steel tubes come coated with a corrosion-resistant black paint finish. The only part that has a chrome finish is the flywheel.
The bike is not extremely heavy but weighs approximately 84 lbs (38 kg). It is twice the weight of the average road bike. This weight adds stability. Furthermore, both base bars of the bike have adjustable levelers, which considerably improve its overall stability.
The bike is not too difficult to move once assembled despite its weight. Its front base features a set of wheels that facilitate its relocation.
The Circuit Fitness AMZ-948BK cycle is a bit smaller than other spin bikes. It is only 41″ (104 cm) long and 20″ (51 cm) wide. Therefore, it can fit into a small room, but it is advisable to leave at least 24″ (61 cm) of clearance around it for easy access.
Last but not least, the bike integrates several ABS parts as well. But these only have a protective role; they shouldn’t affect its overall sturdiness. The most notable ones are the belt cover and the brake pad cover.
Seat and handlebars
The Circuit Fitness AMZ-948BK Revolution Cycle includes a saddle designed for superior comfort. First, it is larger than the average race seat, providing an extra contact surface. Second, it integrates a generous layer of foam cushioning, and its top is contoured for improved breathability.
Its rear section features two springs, which enable it to flex and adapt to your movement as you ride. In addition, its cover is durable vinyl material, sweatproof, and easy to maintain.
The bike’s seat is adjustable (up, down, front, back). In addition, its upright bar features several adjustment positions, while its horizontal slider adds a few extra inches of fore/aft adjustability.
But considering that the bike is slightly smaller than other models, it only accommodates users between 5’0 ″ and 6’0 ″ (153 – 183 cm). However, taller persons may still use this exercise bike but may not benefit from a complete leg extension.
The bike comes equipped with a multi-grip handlebar. It offers the possibility to adopt a standard grip, a racing grip, and a climbing grip. It also has two short aero bars, so an aero grip and a close parallel grip are also available. A layer of rubber foam material fully covers the handlebar for a comfortable grip.
Unfortunately, they do not have pulse sensors since the bike doesn’t include a fitness monitor. Therefore, if you want to monitor your distance traveled, calories burned, RPM, etc., you must use a separate device.
AMZ-948BK Resistance system
The Circuit Fitness AMZ-948BK indoor cycling bike features a friction resistance system with manual action. Thus, the cycle doesn’t need an external power source or an adapter.
The bike’s resistance system consists of a felt pad brake attached to the tension knob on top of its mainframe bar. For example, when turning the knob clockwise, the brake pad applies more friction to the flywheel, increasing drag and the overall pedaling difficulty.
Like most friction resistance bikes, the bike’s resistance system doesn’t have pre-determined tension levels. So, you have to tighten the brake until you get the desired pedaling difficulty. As a general idea, the brake will tighten until you can barely pedal.
The pad will almost always contact the flywheel since it’s a friction brake, not a magnetic one. Therefore, it will wear out over time, so you will have to replace it after a while. Also, the bike is not entirely silent since there is friction between the flywheel and the brake pad.
In addition, the tension knob also has the function of an emergency brake. You can press it down to immediately stop the flywheel from spinning, which you may be required to do as the pedals continue to turn for as long as the wheel is spinning.
First, the Circuit Fitness AMZ-948BK bike has a 30-lb (13.6 kg) flywheel. It has a perimeter-weighted structure for improved inertia, excellent for spinning workouts. As I’ve mentioned, the flywheel is chrome-coated, with black ABS side panels.
The bike’s flywheel is bi-directional. In other words, it gives you the possibility to pedal in reverse. However, coasting or free-wheeling is not possible on the bike. So, when pedaling in reverse, you will benefit from the same pedaling difficulty.
The bike comes equipped with a durable 3-piece crankset with steel crank arms similar to a road bike crankset. Thus, it can withstand pedaling while standing up. The included pedals are aluminum alloy featuring a non-slip surface and adjustable toe cages. Unfortunately, they don’t have SPD clips, but their threads are standard.
Last, the Circuit Fitness AMZ-948BK Revolution Cycle comes equipped with a belt drive system. It uses a heavy-duty poly-v belt, which offers excellent traction. In addition, the belt doesn’t need any lubrication, unlike a chain drive. In addition, it also contributes to the ride’s overall smoothness, generating slightly less vibration than a chain.
AMZ-948BK Assembly and Maintenance
The bike’s main body comes pre-assembled, with the flywheel, the crankset, the brake system, and the belt already in place. However, the rest of the parts still require user assembly. You will have to attach the two base bars, the seat post, the handlebar post, the handlebars, and the pedals.
However, the whole task shouldn’t take more than 30-40 minutes of your time. The manual provides all the necessary instructions, and an essential toolkit also comes with the bike.
Once assembled, maintenance doesn’t require much. However, it would be best if you kept the frame clean, wiped the sweat from the frame at the end of the workout, and periodically checked for loose bolts and parts.
The brake pad will eventually wear out and will require replacement. If it squeaks when in contact with the moving flywheel, a bit of silicone lubricant should solve the problem.
- Sturdy steel frame – 300 lbs weight capacity;
- Durable paint finish;
- Transport wheels on the front base;
- Adjustable stabilizers on both bases;
- Durable steel crank and metallic pedals with toe cages;
- Multi-grip handlebar with aero bars;
- 4-way adjustable seat;
- Smooth belt drive system;
- Perimeter-weighted, 30-lb flywheel for enhanced inertia;
- Standard friction resistance;
- Bottle holder included;
- Phone holder included;
- Little maintenance is required;
- Easy to assemble;
- Circuit Fitness included the tools needed for the assembly.
- The bike does not have a fitness console;
Circuit Fitness AMZ-948BK Revolution Cycle Summary
The Circuit Fitness AMZ-948BK Revolution Cycle is an indoor cycling bike for home use. It features a 30-lb inertia-enhanced flywheel with a friction resistance system, and its seat is 4-way adjustable and well-cushioned for extra comfort. It does not include a fitness monitor but does have a phone holder.
It’s a reasonably decent exercise bike for spin workouts, interval training, intense cardio sessions, weight loss, and stamina development.
I hope you found this article helpful and informative. Would you please speak up if you have anything you’d like to share or any opinions about my website? I look forward to your comments, questions, and the sharing of ideas.
Please note you should consult your physician to determine if you have any medical or physical conditions that could put your health and safety at risk or prevent you from using the equipment properly. In addition, your physician’s advice is essential if you are taking medication that affects your heart rate, blood pressure, or cholesterol level.