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Diamondback 510T Review

Quick Summary

The Diamondback 510T ($799) is a compact treadmill for walking. It takes up little floor space, can fold for under-the-bed-storage, and arrives already assembled. Main specifications include a 2.0 horsepower motor, a 48” x 17” exercise area and 10 workout programs that control the belt speed. To support digital entertainment the console has a sound system and dock for your mobile device. Read on for details about the Diamondback 510T and an introduction to its upgrade, the Diamondback 910T for runners.


Model Diamondback

Our custom rating considers all of the treadmill's features, specs, warranties, and 100's of user & expert reviews, to save you time!

List Price

Suggested retail price, typically higher than the price you'll pay with our recommended retailers.

Best Price

Since prices change daily, this link goes to our preferred retailer for the current best price. Note: MSRP stands for Manufacturer's Suggested Retail Price.


Treadmill Speed is measured in Miles Per Hour (mph). Average running speed is 5-9 mph.

0.5 - 8 mph

Treadmill Incline measures the angle of the deck, and how steep it is relative to the floor (0% is flat, and 15% is like a steep hill).


The Treadmill Motor is what turns the belt as you run. We recommend at least 2 HP (Horsepower) motors, 2.5+ HP for jogging, and 3.0+ HP for running.

2.0 CHP

Treadmill Deck dimensions are measured in inches: Width x Length. The wider and longer the deck, the safer it is (55-60 inches long recommended for running).

48” x 17”

The Treadmill Belt is the surface you run on. The thicker the belt, the less impact on your joints. At least 2-ply (1 inch) recommended.

Versatread Oversized Running Belt

Some treadmills are designed to conserve space by folding up. This is a convenient option, but some features might be reduced.


Treadmill Programs allow you to complete a workout with changing speeds and inclines, without changing anything manually.

10 Programs
Max. Weight

Treadmill Max User Weight is the amount of weight, in pounds (lbs), that it can safely support, which can represent durability.

340 lbs
Heart Rate

Heart Rate programs allow you to track how many times your heart is beating per minute (bpm), and some control the workout for you.

Dual-Grip Heart Rate Monitor

Dimensions are included to help you figure out if this treadmill will fit properly (Length x Width x Height and Height x Depth).

66" x 30"x 11"

Treadmill Display refers to the screen you'll look at to monitor workouts. LED and LCD displays are similar to TV screens.

MediaView Platform
Cooling Fans

Treadmill Cooling Fans are designed to help keep you cool during an intense workout.

Accessory Tray

Some treadmills include an accessory tray for holding items such as water bottles, wallets, keys, or MP3 players like iPods.


Treadmills that include a sound system allow you to listen to your MP3 player/iPod through built-in speakers (no headphones).

Quick Controls

Quick Controls allow you to select speed, incline and even workout programs with the touch of a button (usually on the handles).


The warranty is a very important part of your investment. The longer the warranty, the longer you can get free/discounted repairs by the manufacturer.

Lifetime coverage for motor, 5 years for frame, 3 years for parts and electronics, 1 year of labor.

Rating: 77.5%

Our Rating

Rating: 77.5/100. Built for shoppers with small home workout spaces, the new Diamondback 510T Treadmill has a small deck and folds for storage under a bed. In comparison most home treadmills are wider and longer, and they aren’t as easily stashed away.

A disadvantage of the small size, of course, is a rather limited workout space: The 510T track gives enough room for a power walker, but its 17” x 48” area isn’t spacious enough for a runner’s long strides. Also restricting this machine’s use to walkers is the low horsepower; this Diamondback treadmill has just 2.0 HP while the standard for runners’ treadmills is 3.0 CHP (continuous horsepower). An alternative for runners is the Diamondback 910T, which pairs a roomy 21.5’ x 63” track and a 4.0 CHP motor.

Ten workout programs are built into the console. These automate the track speed, with each program using a different combination of speeds from 0.5 to 8 miles per hour.

Music and video can help extend your cardio workouts, and Diamondback treadmills have speaker hookups to boost the volume. A media holder is built into the 510T’s console for your tablet computer, smartphone or MP3 player.

Normally this model sells for $799 including delivery. At debut in late 2017 though, the 510T Treadmill had a promotional price of just $719. We expect to see the same sale price reappear throughout 2019. Additionally members of the US military get 10% discounts on Diamondback fitness equipment anytime.


  • Low price, even without a discount
  • No assembly required
  • Takes less floor space than most other home treadmills
  • Folds to a compact size for storage, just 11 inches tall
  • 10 preset workout programs
  • Speakers for your MP3s and video
  • Motor operates quietly and has a lifetime warranty
  • Belt is high quality for the price
  • Magnetic auto-stop feature for safety
  • Three years of parts protection
  • Military discount available (Save 10%)


  • Small workout space (17” x 48”)
  • Lacks incline for extra calorie burn and muscle toning
  • For walking only, unlike the Diamondback 910T


The 510T is a new home treadmill from Diamondback, a company known for no-frills fitness equipment with good warranties. This model is one of the smallest treadmills in our reviews, and it’s only meant for walking. Below are overviews of the workout programs and components.

Workout Programs

This cardio trainer has quick-start buttons for 10 workout programs. Each workout automates the belt speed in a different way, so you can exercise with a pro-designed treadmill routine that fits your fitness goals. Program 1, for example, has you steadily increase speed and then gradually cool down. Program 2 is more dynamic; it introduces interval training. A graph of each preset program is printed right onto the console for convenience.

Treadmill Features

This compact treadmill can fold for storage. Its folded dimensions are 66” long x 30” wide x 11” high.

The track surface measures 17” across and 48” long.

The workout belt is powered by a HiTorque brand 2.0 horsepower motor. Unlike many 2.0 HP treadmill motors, it has a lifetime guarantee.

For safety this fitness machine has handrails and an auto-stop magnet.

A media holder can support your tablet computer or other mobile device. Audio can be amplified with the built-in FreeMix Acoustics 5.0 speakers.

Warranty & Guarantee

The Diamondback 510T treadmill warranty includes:

– Motor: Lifetime

– Frame: Lifetime

– Parts: 3 Years

– Electronics: 3 Years

– Wear items: 90 days

– Labor: 1 Year

Diamondback Fitness provides a 30-day money back guarantee with all their fitness machines.


The Diamondback 510T Treadmill is a recommended buy among budget treadmills for walkers. Unlike most treadmills in its price class, it carries a lifetime motor warranty, a three-year parts warranty and a year of labor. It’s also rare for requiring no assembly. Joggers and runners should choose an alternative, but for walking the 510T is a top value.

Other Diamondback Treadmills


  • James Bent January 12, 2021 at 10:06 pm from So Weymouth ma
    How do I call the company?
    • FitRated January 28, 2021 at 10:29 am
      Hi James, their number is 1-385-255-9025 available from Monday-Friday from 9am-5pm MST.

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