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Free Shipping!

When you buy fitness equipment from us, you receive our free curbside shipping option (limited to the 48 contiguous United States) right to your driveway or front of your residence.

Our HOME USE Warranty

When you buy one of our fitness machines, you instantly receive the following HOME USE warranty:

  • Frame: Lifetime limited (5-years)
  • Brake: Lifetime limited (5-years)
  • Parts/Electronics: 3-years
  • Labor: 1-year
  • Wear & Tear Items: 90-days

See our warranty page for more details.

30-Day Money Back Guarantee

If you purchased from our website and are not completely satisfied with your purchase, we offer a 30-day money back guarantee. You will only be responsible for return shipping and any assembly labor charges you may have purchased.

10% Military Discount

We're proud to support our American service members. As a small token of our appreciation, we offer all active and veteran Military personnel a 10% discount on our fitness equipment and accessories. After purchase, just email our customer service team at support@diamondbackfitness.com with a photo or a scanned copy of your Military ID or DD214 and we'll do the rest!

Discount cannot be combined with any other discounts.

510Ub Upright Magnetic Exercise Bike

Retail: $899.00 Sale: $799.00
Black Friday Sale: $649.00 + Free Floor Mat offer ends Sunday, Nov 25.
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Give Your Warranty a Boost

When you purchase the Diamondback Warranty Boost plan, it enhances our manufacturer's warranty in all of the right places. It's a one-time purchase that fully replaces our standard warranty with a comprehensive and longer lasting plan.

The standard warranty is 3-years parts and 1-year labor. However, with the Diamond Warranty Boost, you can boost your manufacturer's warranty to 5-year parts and labor warranty.

The Diamond Warranty Boost Plan includes:
  • 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 act today, you won’t have to worry about future equipment problems that could derail your workout plans. Give yourself the piece of mind knowing you’re protected no matter what happens.

Add the Diamondback Warranty Boost to your order today!

Financing Available:

Value and Performance

Top reviewed reviews
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The Diamondback 510Ub is the most feature-rich, comfortable upright bike on the market. A great way to get started on your fitness and rehab goals.

  • Integrated heart rate sensors
  • Frictionless magnetic resistance
  • 16 levels of resistance
  • 20 workout programs


510ub living

The best upright exercise bike for your fitness goals

Begin your fitness journey in the comfort of your own home with the award-winning Diamondback Fitness 510Ub upright exercise bike. This top rated stationary bike is the ideal choice for the fitness enthusiast, cardio beginner or someone seeking physical rehabilitation. With its comfort features, ease of operation and low impact on knees and ankles it’s also the perfect exercise bike for seniors.

510ub adjustment

Fits riders of all shapes and sizes

The 510Ub offers complete adjustability to make your ride comfortable and smooth. Easily adjust your seat height, fore/aft saddle positioning, handle bar height and console viewing angle. So, all you need to focus on is getting in shape and feeling great!

510ub console

Club style electronics make your workout more effective.

It’s like having a personal trainer at your side. The 510Ub tracks your progress from start to finish and provides a wide variety of workouts to keep you motivated. 16 levels of resistance and 20 preset workout programs ensure you’ll have limitless options. Plus, the 510Ub features integrated heart rate sensors, so you’ll know just how hard your heart is working for perfectly targeted zone training.

510ub media

Be entertained while you train

The 510Ub features many options to help pass the time while you rack up the miles. You can jam to any personal playlist with the included standard 3.5mm auxiliary audio input. And since you’ll be riding in the privacy and comfort of home, go ahead and crank up the integrated speaker system for some karaoke cardio. There’s even a handy stowaway book rack so you can stay smart while you train.


LCD Display

The 510Ub LCD display makes it easy to keep track of your workout with a bright blue LCD display and real-time feedback

Integrated multi-speed fan

An integrated multi-speed fan helps keep you cool

510 series console

The 510 series console with mp3 connectivity offers users the ability to broadcast their favorite tunes through the integrated speaker system

Personal cooling fans

Diamondback Fitness’ personal cooling fans lets you vary the fan speed during your workout

Fold-out magazine rack

Fold-out magazine rack holds your favorite magazine during your workout and folds away when not in use


Tilt the console and handlebar angle for a customized fit

Target Heart Rate programs

Target Heart Rate programs and hand grip sensors help keep the workout intensity in the target zone

QuickSet program keys

QuickSet program keys help you start your favorite workout programs with a single

Scrolling messages

Scrolling message center guides you through program set up

Twenty workout programs

Twenty workout programs and 16 levels of resistance provide a wide variety of workouts for all users

Multi-position handlebars

Multi-position handlebars allow the rider to pedal while sitting upright, or in a more racer-oriented forward stance

Frictionless eddy current braking system

Frictionless eddy current braking system delivers a smooth quiet, durable ride


Dimensions (assembled): 41″L x 23″W x 58″H
Dimensions (packaged): 39″L x 14″W x 28″H
Shipping Weight: 90 lbs.
Product Weight: 76 lbs.
User Height: 5'4"-6'5"
User Weight Capacity: 300 lbs.


Q: Does this bike require electrical input? Or is it self powered?

Yes, it requires electrical input and includes the proper adapter and cord in the box.

Q: Is the bike shipped fully assembled?

No, it arrives approximately 80% assembled in the box and does require some light assembly. All necessary tools and instructions are included in the box.

Q: Can you manually adjust the resistance and not use a preset program?

Yes, you can.

Q: Do the pedals come with toe clips?

No, they do not. However, the pedals can easily be switched out to other options available at you local bike store. We do not offer any toe clip options for sale.

Q: Can I buy a custom bike seat?

Yes, you can.

Q: What is the flywheel weight?

It weighs 14 lbs. However, the 510Ub is engineered to use frictionless magnetic resistance that is electronically controlled. Therefore, the flywheel weight isn't as important as it is on bikes without magnetic resistance.

Q: What maintenance is required on the 510Ub?

Always wipe down the unit with a mild soap solution followed by a thorough drying with a clean towel. It is important to note that perspiration can be extremely corrosive if allowed to accumulate on the machine. Also prior to each workout, confirm that all adjustment levers and screws are tightened. Tighten crank arms once per month.

Ask Your Pre-Purchase Question!

Do you have a question about this machine before purchasing it? Please ask it below and a sales representative will respond as soon as possible!

Have a question before you buy?

Our friendly support staff is here to answer your questions.

Available Monday – Friday from 9:00 a.m. to 5:00 p.m. MST.


Rating Snapshot

4.8Based on 4 reviews
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By: Brian Goulstone  |  10 months ago

Verified Review for 510Ub Upright Magnetic Exercise Bike

Did a lot of research and this DBF bike is what we wanted. Assembly was straight forward.

Yes, I recommend this product.
Verified Purchase

By: John Gulla  |  over 1 year ago

Verified Review for 510Ub Upright Exercise Bike

Easy to use, quiet and adjustable

Yes, I recommend this product.
Verified Purchase

By: Johanna Landsberg  |  over 1 year ago

Verified Review for 510Ub Upright Exercise Bike

More than met my expectations. Love its built in count-down timer and calorie counter. Was able to get it adjusted so it can be ridden comfortably.

Yes, I recommend this product.
Verified Purchase

By: Oris Miller  |  over 1 year ago

Verified Review for 510Ub Upright Exercise Bike

Great all a round exercise bike.

Yes, I recommend this product.
Verified Purchase

510ub full back right
510Ub Upright Magnetic Exercise Bike Black Friday Sale: $649.00