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Nautilus Treadmills

★★★★★ 3.0 out of 5
  • Discontinued mid-range home treadmills — roomy decks, weak warranties, now used-only
Nautilus Treadmill Reviews - New T618 Performance Series Machine

Brand Facts

  • Status Discontinued — per BowFlex's own site, Nautilus-branded equipment has not been marketed or sold since May 1, 2024 (Nautilus trademark sold May 2023; parent company became BowFlex Inc., then filed Chapter 11 in 2024)
  • Original price (when new) ~$949 (T614) up to ~$1,299–$1,499 (T618) MSRP; now available used/refurbished only
  • Models reviewed 5
  • Models Performance Series: T614, T616, T618
  • Motor 2.75 CHP (T614), 3.0 CHP (T616), 3.5 CHP (T618)
  • Running surface 20" x 55" (T614); 20" x 60" (T616/T618)
  • Speed / incline 0–12 mph; up to 12% incline (T614) or 15% (T616/T618)

Pros & cons

Pros

  • Roomy decks (20" wide, up to 20" x 60") and 3.0–3.5 CHP motors that were generous for the sub-$1,500 price
  • Folding SoftDrop frame, and the T616/T618 shipped with a Bluetooth-enabled console and an included chest-strap heart-rate monitor
  • Long 10-year frame-and-motor coverage for a value-priced machine
  • Bluetooth sync to the Explore the World app added scenic, route-based workouts

Cons

  • Owners report a noisy belt and sluggish speed/incline response
  • Short parts (~3 yr) and labor (~1 yr) coverage undercut the headline 10-year frame/motor figure
  • Basic dual-LCD consoles felt dated next to touchscreen rivals, and owner satisfaction ran low (~2.7/5 on Nautilus's own site)
  • Brand is discontinued — no new units and no warranty on a used purchase, so buying secondhand is a gamble (BowFlex still lists replacement parts and support for existing owners)

Nautilus Fitness is a brand under Nautilus, Inc., a corporation that also owns Bowflex and Schwinn. It is currently the second largest exercise equipment manufacturer in North America. The biggest is ICON Fitness, makers of NordicTrack, ProForm, Healthrider and other popular brands.

Nautilus started promoting their treadmills for home use several years ago and they currently have three models in their lineup: T614, T616 and T618.

All three have some nice features including a wide array of workout programs, good cushioning and incline capability. However, poor warranties, even on the top of the line T618, keep them from being a top recommendation.

Check out all of the latest models at special sale prices here

Still, they remain quite popular due to the extras that the company packs in. Let's take a look at the three models...

Nautilus Treadmill Reviews - A Look at the Models

T614

The entry-level T614 model in the series has a 20" x 55" deck, 2.75 CHP motor, up to 12 mph speed, up to 12% incline and 22 built in workout programs.

It comes with SoftDrop folding, contact and wireless heart rate, a 5.5" blue backlit LCD display and a 300 lb. maximum user weight capacity.

T616

The mid-range T616 treadmill gives you a bit more than the T614, with a longer 20" x 60" deck, stronger 3.0 CHP motor, up to 15% incline, and 26 built in workout programs.

It adds a free wireless heart rate chest strap, two LCD displays and Bluetooth workout tracking and fitness app syncing.

T618

The top of the line T618 amps it up even more, with a 3.5 CHP motor, incline/speed control in the handrails, advanced Rebound cushioning, a 350 lb. max weight capacity and a stronger warranty than you get on the T614 and T616.

You can find in-depth model reviews below, or keep scrolling down for more information on Nautilus treadmills...

Models We've Reviewed

Are Nautilus Treadmills a Good Choice?

The treadmills we've tested performed very well. These are not the most advanced treadmills on the market, but they do come with a lot of features and capabilities.

All three models fold and are easy to store. They have a similar stylish design. The components are durable, so that those within the 300 lbs weight max can use them without any problems.

The exercise selection is varied enough to keep things interesting and keep you motivated. You have interval training, weight control, heart health, performance workouts and more.

If you are a taller person, you'll be better served with the longer belts on the T616 and T618. If you are an avid runner, you can train comfortably on these machines.

If you're on a budget, it's good to know that all Nautilus treadmills are under $1,300.

What you may not like is the warranty. You only get 10 years on the frame and the motor on the T614 and T618, just like on their sister Schwinn treadmills.

From our point of view this is related to the fact that the company doesn't really focus too much on their treadmill line.

Even if this brand was a hit a couple of years ago, it's not anymore. We would look at NordicTrack, ProForm or Sole if you want to buy a home treadmill in this price category.

If you're dead set on a Nautilus treadmill, go with the more advanced T616 or T618 with their tracking capability and roomier decks.

They provide a much better experience and you will be more motivated to work out.

But opt for the extended warranty if it is available just to cover yourself.

Frequently asked questions

Are Nautilus treadmills still being made?

No. Per BowFlex's own site, Nautilus-branded fitness equipment has not been marketed or sold since May 1, 2024. The Nautilus trademark was sold in 2023 and the parent company later went through Chapter 11 bankruptcy, so any Nautilus treadmill you find today is used, refurbished, or leftover clearance stock.

Which Nautilus treadmill was the best?

The T618 topped the Performance Series with a 3.5 CHP motor, a 20" x 60" deck, 0–15% incline and a 350 lb weight capacity — the most capable of the three. The T616 was the mid-range pick and the T614 the entry model.

Are Nautilus treadmills worth buying used?

They had decent decks and motors for the money, but reviewers flagged noisy belts and slow speed/incline changes, and a used machine carries no warranty now that the brand is discontinued. Buy only if the price is low and the machine has been well maintained.

What was the warranty on a Nautilus treadmill?

When sold, models typically carried 10 years on the frame and motor but only around 3 years on parts and 1 year on labor — a weak service window that was a common complaint, and one that matters more now that the brand is defunct.

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