Diamondback Fitness 510ic & 910ic Indoor Cycle Magnetic Trainers Review

Diamondback Fitness 510Ic & 910Ic Indoor Cycle Magnetic Trainers

When you’re after an effective cardio workout at home, it’s hard to beat a session on an indoor cycle. Cycling is a low impact, high energy aerobic workout than can be done effectively with a minimum of space and noise. One of the most respected players in the home cycle market is Diamondback, with their two most popular offerings being the 510ic and the 910ic.

In this article, we provide you with an in-depth review of the Diamond 510ic and the Diamondback 910ic. We’ll scrutinize them individually and then weigh them up side by side to allow you to make the smartest buying decision.

About Diamondback

Diamondback Fitness, established in 1991, is a major home fitness company who began with a focus on outdoor cycles. They offer a full range of ellipticals, recumbents, uprights, indoor cycles, steppers, and treadmills. They are based in Kent, Washington, USA.

Diamondback 510ic Review

Diamondback Fitness 510Ic Adjustable Indoor Cycle with Electronic Display and Quiet Magnetic Flywheel

The Diamondback 510ic is a mid-range home use exercycle that is packed with features. It has been rated ‘Best Buy’ four years in a row by Consumer magazine. It has been updated for 2019 to make it, even more, user-friendly.

Diamondback 5101c Specs:

  • 16 levels of resistance
  • Contact heart rate sensors
  • 12 workout programs
  • 32 lb flywheel
  • Max weight 300 lbs
  • Belt drive
  • Height range: 5’2” – 6’5”
  • 3-year frame warranty


  • 16 resistance levels
  • 32lb flywheel
  • Fully adjustable
  • Multi-position handles
  • 300 lb max user weight
  • Suitable for heights from 5’2”-6’5”


  • Console not very impressive
  • Seat not comfortable

Diamondback 510ic Features:

12 Programs

The 510ic is a rarity in terms of spin bikes because it provides you with 12-built in workout programs. This allows you to use it to achieve every type of workout you want, from hills to mountains and all sorts of terrain in between. You also get four heart rate programs.

Diamondback Fitness 510Ic Adjustable Indoor Cycle with Electronic Display and Quiet Magnetic Flywheel

Quiet Operation

The Diamondback 510ic makes use of magnetic drives to power the bike. One result of this is that you get a whisper-quiet operation. That’s great if you’re exercising in your lounge room while others are watching TV.

Diamondback Fitness 510Ic Adjustable Indoor Cycle with Electronic Display and Quiet Magnetic Flywheel

Heavy Duty Frame

The 510ic is made from solid steel. This makes it rugged enough to handle a 300-pound maximum user weight. It is durable enough to last for many years. The bike weighs 126 pounds and will not wobble from side to side, even when you’re spinning at full intensity.

Diamondback Fitness 510Ic Adjustable Indoor Cycle with Electronic Display and Quiet Magnetic Flywheel

16 Resistance Levels

You get 16 levels of smooth, adjustable resistance on the 510ic. You don’t get any of the jerkiness that is common with lesser models so that the transition between resistance levels is very natural. Once you get to level eight, the resistance starts to get quite challenging, so there is plenty of range here to challenge even the fittest person.


The 510ic provides full rider customization by way of handlebar and seat adjustability. Both can be adjusted fore and aft as well up and down. In fact, this bike can be used by people with heights of between 5’2” and 6’5”.

Diamondback Fitness 510Ic Adjustable Indoor Cycle with Electronic Display and Quiet Magnetic Flywheel


A secure foothold is important when you’re exercising on a spin bike. The 510ic has you covered with tie clips to ensure that feet are kept solidly in place. However, these pedals will not take spinning shoes or cleats.


The 510ic can be easily stored away when not in use. It comes with two wheels at the front of the bike. This allows you to tilt the bike forward to move it. You can move it just as easily on carpet as you can on other surfaces.

What’s Not So Good

The Diamondback 510ic requires electric power to operate. That limits its positioning to proximity to a power outlet. The handlebar adjustment is a bit of a hassle, requiring you to undo four bolts. The heart rate monitor is not that reliable. In addition, the seat on this bike is not very comfortable. The console is also quite rudimentary.

Diamondback 510ic Summary

The Diamondback 510ic will provide you with a solid workout, whether you’re after a spin or a conventional cycle session. Its 12 inbuilt programs and 16 levels of resistance deliver plenty of training options. This is an attractively priced spin bike that delivers magnetic resistance, belt drive, heart rate console, and workout programs.

Diamondback 910ic Review

Diamondback Fitness 910Ic Adjustable Self Generating Indoor Cycle with Electronic Display

The Diamondback 910ic is an upgrade from the 510ic to take your workout to the next level. It provides you with a heavier flywheel, self-generating power so you’re able to exercise anywhere and 32 resistance levels.

Diamondback 9101c Specs:

  • 32 levels of resistance
  • ANT + wireless heart rate
  • 40 lb flywheel
  • Max weight 325 lbs
  • 12 workout programs
  • Height range: 5’2” – 6’5”


  • Smooth, natural resistance
  • 40 lb flywheel
  • Fully adjustable
  • Multi-position handles
  • 325 lb max user weight
  • Suitable for heights from 5’2”-6’5”
  • Lifetime frame and brake warranty


  • Console readouts lost when your top pedaling

Diamondback 910ic Features:

Self-Generating Power

Unlike the 510ic, the 910ic model does not require a power plug to operate. The console is powered by your calorie-burning energy expenditure. That allows you to use the bike anywhere. However, you will need to plug the bike into a power outlet after first assembling it in order to charge the components. Going forward, you will have to recharge it about once per month.

Diamondback Fitness 910Ic Adjustable Self Generating Indoor Cycle with Electronic Display

Wireless Heart Rate Monitor

You get pulse rate monitoring via a wireless heart rate tracker. This is more reliable and convenient than the handheld version that you get on the 510ic. While the bike is fitted for Polar heart rate wireless monitoring, it does not come with a wireless heart strap which must be purchased separately.

40 Pound Flywheel

The 40-pound flywheel on the 910ic delivers a very smooth roll and a smooth ride that simulates a road biking experience. The higher flywheel weight provides you with greater momentum and allows you to recreate the high rpm training techniques that you would find in a spin class.

Diamondback Fitness 910Ic Adjustable Self Generating Indoor Cycle with Electronic Display

12 Workout Programs

The dozen workout programs that you get with the 910ic are the same as on the 510ic. That means that you can select between eight customized fitness programs and four heart rate programs.

Diamondback Fitness 910Ic Adjustable Self Generating Indoor Cycle with Electronic Display

32 Resistance Levels

With a huge 32 resistance levels, you are able to select more precise settings that are great for progressive resistance workouts. The transition between resistance levels is impressively smooth and natural. The built-in heart rate receiver automatically controls the level of resistance based on your training goals.

Extra Features

The 910ic comes with a built-in water bottle cage and storage department. You also get heavy-duty pedal cranks, multi-position handlebars and custom graphics on the control monitor.

What’s Not So Good

As we’ve already discovered, the 910ic operates from user-generated power. This includes the console power. However, your console information will be lost as soon as you stop pedaling. A number of reviewers have also found the console and heart rate monitor to be unreliable.

Diamondback 510ic vs 910ic

The Diamondback 510ic and 910ic are both impressive home use spin bikes, with the latter being a beefed-up version of the former. Both bikes provide you with whisper-quiet performance, a high level of adjustability, multi-position handlebars and 12 workout programs.

The two big differences between these two bikes are:

  • the 910ic has a 40-pound flywheel compared to a 32 pounder on the 5101c
  • the 910ic is self-powered whereas the 5101c runs of electricity

Diamondback 510ic

Diamondback 910ic

Diamondback 5101c
Diamondback 9101c


Computer Controlled Magnetic Resistance


Self-generating electronic resistance system

Resistance levels:


Resistance levels:



32 lbs


40 lbs

Heart rate monitoring:

Contact heart rate sensors

Heart rate monitoring:

Wireless heart rate controlled resistance

Max user weight:

300 lbs

Max user weight:

325 lbs

User height:

5'3" – 6'5"

User height:

5'2" – 6'6"

With 32 resistance levels, the 910ic also provides you with double the intensity adjustments of the 510ic. This provides you with a lot more precision in adjusting your resistance. It also caters more to the higher intensity requirements of experienced exercisers.

The 910ic also provides you with a more sophisticated and reliable way to monitor your heart rate.


The Diamondback 510ic comes with Diamondback’s standard warranty of 3 years on parts and 1 year on labor. However, you have the option of beefing up your warranty cover at an additional cost of $159.99. This provides the following coverage:

  • Parts and labor coverage for 5 years
  • Power surge coverage
  • Mechanical and electric coverage
  • Convenient, hassle-free service
  • Deal directly with Diamondback Fitness, not a third party
  • No deductibles on covered claims
  • Professional on-site repairs

When you purchase the Diamondback 910ic you get Diamondback’s Lifetime Gym Quality Warranty. This gives you a lifetime warranty on the frame and brakes.

Final Thoughts:

The Diamondback 510ic is a great all-round bike that provides you with a quality spin workout as well as a dozen in-built programs. This is a solid bike that looks great, provides a smooth, natural pedal motion and is competitively priced. For a more high-end version of a home spin cycle, the Diamondback 910ic gives you an even smoother ride and greater resistance potential thanks to its 40-pound flywheel, gym-quality construction, and self- generating power.

    Kevin Lee

    Health and fitness have always been a passion for me; whether its being in the weight room, going for a run before work or even participating in a half iron man triathlon. ShapeJunkie was created to share to knowledge and love of fitness with others.