RENPHO AI Good Train Bike Evaluate – Every kind of exercises, in your lounge! (so long as you might be beneath 6′ tall)

We use affiliate links. If you buy something through the links on this page, we may earn a commission at no cost to you. Learn more.

REVIEW – As the pandemic drove everyone out of the gym and into their homes, in-home fitness systems like Peloton took off. Everyone seemed to have one, which might explain why they were so hard to come by for a while. And they were expensive. Peloton bikes are nice, but they’re really just a stationary bike that displays key metrics like power (how much energy you’re producing, watts) and cadence (how fast you’re pedaling, in RPM). Could you recreate the same basic experience on a non-Peloton bike that has these features? And could this bike do other cool stuff like adjust the resistance itself? The answer is yes, with a few caveats. Let’s take a look at the RENPHO AI smart exercise bike.

What is it?

The RENPHO AI Smart Exercise Bike is an intelligent stationary bike and app ecosystem that uses AI to customize workouts based on your fitness and ability. It also works with other apps like Peloton, Zwift and Trainer Road.

What’s in the box?

  • RENPHO AI Smart exercise bike
  • Parts and tools to assemble the bike (don’t worry – it’s not difficult)
  • power adapter
  • Manual
  • Quick Start Guide

hardware specifications

  • Intelligent technology: RENPHO AI Gym App – iOS and Android
  • Third party app connectivity: FTMS Bluetooth
  • Third Party App Control: Kinoma, Zwif, FulGas, Rouvy, XERT, Wahoo Systm (yes, that’s how it’s spelled)
  • Resistance Type: Intelligent Motor Damping
  • Resistance function: automatic and manual resistance
  • Performance Accuracy: ≥90%
  • Power range: 0-1000 W (peak)
  • Gears: 80 (the bike has no real gears – this is simulated)
  • Metrics: RPM, Power, Cadence, Resistance, Calories in real time
  • Over-the-Air Firmware Updates: Yes
  • Frame: Carbon Mild Steel
  • Size: 49 inches (height) x 20 inches (width) x 40 inches (length)、
  • Seat: universal seat cushion standard dual rail mounting and airflow system 8 inches (width) x 10.5 inches (length)
  • Pedals: Adjustable pedal straps
  • Tablet mount: Up to 8.46 inches
  • Adjustability: Handlebar: Range 32.5” – 41.3” Saddle Front/Rear: Range 0 – 3” Saddle Height: Range 32.5 – 41.3”.
  • Crank Length: 6.7 inches
  • Q factor: 6.3 inches
  • Calibration: factory setting
  • Power Required: 120V household power
  • Operating Temperature: 41-122°F
  • User Requirements: Height range: 4′11″ – 6′0″ (official specs say 6’5” but that’s impossible)
  • Maximum weight: 265 lbs


The hardest part of assembling the RENPHO AI Smart exercise bike is taking the bike out of the box. It’s very well packaged and protected, but it’s a heavy box to move. Having a buddy helps.

Once you’ve got the box where you want it, simply flip it over, trim the bottom and lift the box off. Then you peel away the packaging, separate the parts and follow the simple instructions using the tools provided. All in all it took me about 30 minutes from unpacking to driving. The tools provided are sufficient for assembly (just two hex keys and an open-end wrench for the pedals). The threads of the screws are all threadlocked, which allows for a stable and secure build, but can make it difficult to screw the screws into their holes. I was worried about getting crossed a couple of times, but after some double and triple checks, I chalked the resistance onto the threadlocker. The bolts went all the way in and seemed pretty secure.

design and functions

The RENPHO AI Smart exercise bike is physically similar to most stationary bikes on the market. It is highly adjustable, with seat height, seat placement (front, rear) and handlebar height adjustable without tools.

There’s a sturdy mount for a phone or tablet, and a USB port right on the stem to power your device while you work out. This was a nice surprise as I couldn’t find any mention of this USB port in any of the documentation for the bike. A water bottle holder is also included. The phone/tablet holder is covered in a miracle substance that really grips your device but doesn’t feel sticky. I don’t know what it is but it works really well to keep your device safe.

The RENPHO AI smart exercise bike is controlled by a large metal dial in the center of the stem, with a simple digital display in the center. Adjustments are made by turning the dial, and confirmation is by tapping the screen. It’s a simple and efficient system. The gauge may change depending on what you’re doing and what apps you’re using, but the basic gauge alternates between resistance (0-40 Nm), power (watts), cadence (RPM), time and Bluetooth status.

The bike can measure and report power and cadence via Bluetooth and also control resistance via an app. This comes in handy during training. If the workout wants you to produce 170 watts, the resistance will be adjusted to ensure that happens. Performance depends on how fast you pedal and how hard you pedal. Pedal faster and the resistance will be reduced. Pedal slower and the resistance increases. The bike controls everything depending on which app you use.

The included (free for life!) AI Gym app is very well made, but not quite as engaging as other apps designed for at-home workouts. The app connects easily to the bike (via Bluetooth) and supports bike firmware upgrades, some of which occurred during my testing. The app can customize the workouts based on your age, ability, and fitness level, after giving you a basic fitness test on the bike to get started. The fitness test increases the resistance every minute until you get to a point where you can no longer pedal. It can then create a customized fitness plan week by week to help you achieve your goals. It also uses this information to scale the resistance for each workout and challenge course in the app. So the fitness test is pretty important. It’s also important to occasionally repeat the fitness test as your strength and endurance increases. It takes 10-15 minutes.

The app includes over 70 different videos and courses including Free Ride, Power Course, Video Course and Challenge. With the free ride, you just drive and get a small ad that shows you all your stats. But you have full control.

On the strength course, you follow a predetermined workout (many to choose from) and the bike adjusts the resistance for you to ensure you meet goals.

The video course is similar to the Power course, but you have a live (recorded) instructor, similar to Peloton or an in-person spinning class.

And the challenge is where you’re actually driving on a real road, with a video of what that would look like. When you hit a hill, the resistance increases, and when you hit a decent one, the resistance drops. It’s very realistic.


The overall performance of the bike and the app ecosystem is pretty good, with two major caveats. Firstly, the RENPHO AI smart exercise bike is too small for people taller than 1.80m. The specifications state that the bike is suitable for people up to 6ft 5in tall, but that’s impossible without it affect the proper fit of the bike. I’m 6’1 and it’s too small for me. Good bike fit includes fully extending your leg at the bottom of the pedal stroke and keeping your knee slightly bent. Without raising the seat past the “stop here” point, this is impossible for me to do, even barefoot. Riding a bike with a seat that’s too low decreases overall power production and can be really bad for your knees. So if you’re over 6 feet tall, unfortunately, this bike isn’t an option. But my 5’3” wife loves it.

The second caveat is that the Resistance occasionally does really weird things. The resistance on the bike is electronic and controlled either manually by turning the dial on the stem or automatically by the app you are using. When using the bike manually, the resistance starts at 10 N⋅m, which is pretty easy. As you lower it it gets easier until you reach about 3.5N⋅m when all of a sudden it gets VERY hard. Turning the knob doesn’t help that much to fix the problem. To get out of this situation, it seems that you have to stop pedaling, pedal backwards a couple of strokes, and then there is a noticeable “pop” and the resistance goes back to normal. The problem mostly occurs in the lower 1/4 of the resistance band. Staying above that generally avoids the problem, but then you can’t use the bottom ¼ of the resistor.

Another oddity with the resistance occurs when using the app. The resistor will turn off randomly for a few seconds. This problem actually made it difficult for me to complete the fitness test on the bike, as I kept failing individual resistance intervals. While these drag issues do not render the bike unusable, they are very annoying and make for an uncomfortable user experience. I hope that future firmware updates can fix these problems.

A ray of hope for bikes is the AI ​​Gym app. It’s very well done, free (!!) and very varied. It works well with the bike and offers very solid training opportunities with lots of variety. I hope that RENPHO will keep adding different classes and courses to the app to keep things fresh.

What I like

  • Good hardware (unless the stupid resistor is a hardware issue)
  • Well packaged, easy assembly, tools included
  • Very stable and easy to move with wheels on the front
  • Great app with many variations in workouts and classes
  • A good value for a bike that measures and transmits power and cadence
  • Includes USB port to charge your device
  • It works with other apps like Peloton and Zwift

What I would change

  • The bike is too small if you are over 6 feet tall. Make the seat post longer.
  • Resistance issues will need to be resolved soon, hopefully through a firmware update

Final Thoughts

For the price, the RENPHO AI smart exercise bike is good value in a stationary bike and app ecosystem. That the app is so good and free is impressive. I just hope the bike can be improved with a firmware update. But if you’re over 6 feet tall, you’re just out of luck. I think RENPHO could fix this issue by fitting a longer seatpost, but we’ll have to see that. Overall I’m generally happy with the bike (although I can’t use it because I’m too big) and very impressed with the app.

Price: $499.99
Where to buy: RENPHO or Amazon
source: The template for this review was provided by RENPHO

Comments are closed.