Good / The ProForm 505 CST Treadmill has a good motor, decent speed limit, and a lifetime motor warranty.
Bad / Like most cheap treadmills on Amazon, the ProForm 505 CST Treadmill has bad customer service complaints and many users complaining about parts failing. The limited warranty is due cause for worry, and the small viewing panel, as well as limited extra features like lack of Bluetooth, no fans, and no speakers, might mean you want an upgrade sooner than later.
Verdict / If you don’t have the money to spend on a slightly more reliable and full-featured treadmill like the ProForm Pro 2000 or the Sole F80, and you don’t mind risking a malfunction later on down the line, consider checking out the ProForm 505 CST Treadmill.

ProForm 505 CST Treadmill Review

The ProForm 505 CST Treadmill is a popularly sold treadmill, and it holds a four-star rating on Amazon with over 480 reviews. A lot of these reviews are complaints, but a larger amount seems to have good things to say about the ProForm 505 CST Treadmill.

However, with our analysis and comparison of features as well as a look at what customers are saying, we will give you a better verdict on whether you should buy or skip the ProForm 505 CST Treadmill. Read the full scoop in this ProForm 505 CST Treadmill review.


The ProForm 505 CST Treadmill goes for $534 on Amazon. This is a decent price–but for a treadmill, it’s still a bit on the cheap side. Is the ProForm 505 CST Treadmill worth $500 or should you spend more to get a better treadmill that will last longer?


ProForm 505 CST Treadmill Review

The ProForm 505 CST Treadmill has a decent amount of features for the price. You get an average incline of 0 – 10% Quick Incline, a fairly powerful 2.5 CHP Mach Z Commercial Motor, a large LCD Window, 18 Built-In Workouts. iPod compatibility, foldability, “ProShox” cushioning, and a 300-pound weight limit.

Compared to some other products these specs are quite good. If you go any cheaper, you’ll get a pretty weak motor and the 2.5 CHP motor here should give you decent power with a speed limit at 10 MPH.

The LCD window on this model is pretty weak, and it’ll only show you the extreme basics compared to some more expensive models which actually have screen-like LCDs instead of just “viewing windows.”

Lastly, if you spend more, you can increase incline up to 15% usually, but if you don’t care too much about pushing yourself towards higher incline, this model should suffice fine.


ProForm 505 CST Treadmill Review

The ProForm 505 CST Treadmill comes with a lifetime motor warranty, but there isn’t information about the deck, parts, or labor warranties.

Looking at other users who have used the treadmill gives mixed results on this treadmills longevity. There are plenty of angry customers who have had bad experiences, and a few customers who have had good experiences.

Most customers seem to hate the company’s customer service, and a lot of customers have issues with the motor burning out. Some also say that the treadmill is hard to put together and that the machine only lasts a few months. Warranty claims also seem to take forever.

Given that this treadmill has a decent price point, it is a bad sign that it doesn’t have better information about its limited warranty. I wouldn’t recommend this treadmill or any treadmill that is cheaper if you want a reliable product that won’t have problems within a few months.

ProForm 505 CST Treadmill Review Conclusion

The ProForm 505 CST Treadmill, like a lot of treadmills around this price point, seem to be bargain deals with decent specs that will serve entry level treadmill users.

However, in most cases, it turns out too good to be true since the low price point can guarantee reliable parts and good company support or warranties. If you do get a good model, you’ll find the treadmill worth the price point, and it’s a good choice for basic users.

Instead, I would recommend spending more to make sure you get a high-quality treadmill–a product that you can trust to be good.

Check out some of our higher rated reviews here to find these reliable treadmills.