Diamondback Fitness 510Ic Indoor Cycle Review

The Diamondback Fitness 510Ic Indoor Cycle is a pretty unique option among indoor spinning bikes, offering preprogrammed workout routines and a computer-controlled resistance system. What's more, it delivers a quality warranty at an attractive price point, making it one of the best value-for-money spinning bikes around.

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The Good

Comprehensive collection of preset workout routines

The Diamondback Fitness 510Ic Indoor Cycle’s most notable feature is definitely found in its automated workout routines. Choose from 14 different workout programs, including hill courses, interval workouts, fat burn routines, and heart-rate targeting programs. You can even design your own custom workout and save it for future use. Since the 510Ic Indoor Cycle’s resistance system is computer controlled, you don’t have to worry about handling the resistance changes by hand. Few other indoor cycles on the market deliver either programmed workout routines or computer-controlled resistance, features much more common among upright and recumbent exercise bikes. When you prefer to cycle on your own, the free ride setting enables you to choose among the 16 available resistance levels with the push of a button.

Full-featured workout monitor

The Diamondback Fitness 510Ic has one of the best workout monitors among indoor cycles. A bright blue, easy-to-read LCD screen displays a variety of useful workout statistics, including time, distance, speed, burned calories, heart rate, and cadence, which is a count of your pedal rotations per minute. Whenever you’re working through a preset cycling routine, you can follow your progress along the virtual course right on the screen. The monitor console also includes push-button controls for selecting workouts routines and changing resistance levels. What’s more, the monitor is powered completely by your pedaling, meaning you don’t need to worry about batteries and you don’t have to locate the cycle near a power outlet, at least one of which is required by most exercise bikes on the market. You can choose to plug in the monitor to power it without pedaling.

Very good warranty coverage

The Diamondback Fitness 510Ic Indoor Cycle comes with a strong warranty, including five years of coverage on the frame and the magnetic braking system, three years of coverage on electronic and mechanical parts, and one year of coverage on associated labor costs. Although you can find a number of indoor cycles with a 10-year frame warranty, the brake, parts, and labor warranties you get with the 510Ic Indoor Cycle are as good as or better than most models on the market. Wear parts, such as the seat and pedal straps, are covered for only 90 days, which is pretty typical for the industry.

Fully adjustable

The 510Ic Indoor Cycle enables you to fit the bike to your height and arm length with four-way adjustability in both the seat and the handlebars. Raise or lower the seat to achieve the optimum leg extension and then adjust the seat forward or back to get the appropriate position over the pedal crank. Similarly, adjust the handlebar position in the same four directions to achieve your desired upper-body riding position. Not all bikes on the market include such comprehensive adjustment options to help you get just the right fit to achieve both power and comfort while cycling.

Integrated heart rate sensors

Although relatively common among upright and recumbent exercise bikes, this Diamondback Fitness model is one of the only indoor cycles to include integrated heart rate contact sensors. The sensors are built into the handlebars, which you must grip continuously to get an accurate heart rate reading. Your heart rate is displayed in real time on the cycle’s workout monitor. Notably, there are several workout routines that utilize your heart rate reading in real time to modify the 510Ic Indoor Cycle’s resistance level in order to maintain a selected target heart rate.

The Bad

Exceptionally heavy

Weighing in at 125 pounds fully assembled, the Diamondback Fitness 510Ic Indoor Cycle rates as one of the heaviest home exercise bikes around. While the cycle does have convenient front-mounted transport wheels to move the cycle out of the way or to another room, the cycle must be tipped upward to engage the wheels. Many users will find they need help to move the cycle safely due to its sheer weight. If you decide on this cycle, you should also plan to have some help on hand during assembly. Although assembly is not terribly difficult, requiring no more than an hour or two, some help handling the weight of the machine is essential for most buyers.

The Details


  • Price: $799


  • Brakes: Lifetime
  • Electronics: 3 years
  • Frame: Lifetime
  • Labor: 1 year
  • Parts: 3 years


  • Assembled Dimensions: 42"L x 23"W x 46"H
  • Assembled Weight: 126 lbs
  • Type: Cycling
  • User Weight Capacity: 300 lbs


  • Drive System: Belt
  • Levels of Resistance: 16
  • Number of Workout Programs: 14
  • Resistance System: Magnetic

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