RadMini Step Thru Fat Electric Bike Review

Bike Stores that Sell RadMini Step Thru

Is the RadMini Step Thru a Folding Bike Ready Fulfill your Minimum Requirements?

The Radmini Step Thru is an electric folding fat bike introduced by Rad Power Bikes around January 2019.

In general, it gives a firmer balance on the road and also offers you an opportunity to fold it and take it with you everywhere.

RadMini Step Thru Fat Electric Bike Review

Thanks to its tires, this e-bike is packed with plenty of strength to cruise through tough terrains without compromising on comfort.

I believe this RadMini 2019 is still a good competitor for 2020. Regardless, the Radmini Step Thru review will uncover what exactly it has to offer, its features and if its a wise investment.

RadMini Step Thru Specs

MOTOR- Class: Pedal Assisted and Throttle - C3.
- 48v, 750W.
- 80Nm torque.
- Bafang.
FRAME- Material: aluminum.
- Type: Foldable low step.
- 42" x 23" x 30 (LxWxH).
BATTERY- Range (av): between 25 miles (40 mk) to 45 miles (72 km) a single charge for throttle and pedal assisted respectively.
- Brand: Samsung.
- Chemistry: Li-Ion (672Wh).
- Volt & Amp: 48v; 14Ah.
- Charging Time: between 5 to 6 hrs to 100%.
GEAR SYS- DNP 1 to 7 speed, 11-34 tooth freewheel.
- Shimano.
TOP SPEED- 20 mph (32 km/h).BRAKES- Tektro Aries (MD-M300) hydraulic braking system.
CONTROLLER- Rad LCD Controller - SW (read the controller section for details). OVERALL WEIGHT- With battery: 31 kg (69 lbs).
RIDING MODES- Five (5). Read controller section for details.TIRES- Kendra K-Shield puncture-resistant liner.
- D: 20" W: 3.3".

The Foldable Frame & Design

This Rad model was crafted to fit riders with heights between 4’10” and 5’10” (147 cm to 178 cm).

If you fall outside this range, you may want to consider other more suitable options.

  • Frame

It has an aluminum frame size of 14″ and a total length of 68″. The seat is also well suited to bear the weight of the rider at a convenient height.

Another aspect to discuss is its foldability. It has a folded dimension of 42″ x 23″ x 30 (LxWxH), which makes it easy to pack inside the back of a car or truck.

You can even take it on a train, where it is acceptable, of course. However, this doesn’t mean that 31 kgs is easy to carry around.

Couple of things I don’t like:

1- I don’t find appealing the front wiring. Despite of having the cable cover, it could’ve been better designed but I know this is always a challenge for folding ebikes.

2- For an ebike expected to go “off-road”, no front or rear fenders is a downside. Luckily, Rad Power Bikes thought about it and the Step Thru 2 model now comes with fenders.

  • Low Step Design

Maybe, the most interesting factor when looking at this fat tire ebike is the step thru feature.

This makes it very attractive for any rider since it was designed to be used by any person – not too masculine but still ok.

Despite the simple and minimal design (which I like), this Rad ebike has an ridiculous weight of 31 kg (69 pounds) – very heavy compared to other folding fat tire models like the Ecotric fat26s900.

Aside from its impressive weight, it is capable of carrying a load up to 125 kg (275 pounds).


My advise is to never get to the load limit since I haven’t been a big fan of certain connection in folding e-bikes.

Overall, for riders who prefer something more lightweight, this could be a downside.

Despite of my thoughts, I’ve heard that it has been built with the strongest hinge ever made for any Radmini electric folding fat bike.

It is the minimum requirement to have, considering the general weight of the whole e-bike.

Other Accessories

Generally, you will get this Mini version with the minimum elements. For your comfort, you can also include a front and rear rack to carry more stuff.

Rear rack compatible with Radmini fat bikes.

In case you end up adding the racks, you will have to re-attach the front and rear lights.

In terms of the front light, it will be in a fixed position along with the rack. This is contrary to what you would have as standard when taking turns.

Quality of the Fat Tires, Rims and Gears

Of all the electric folding fat models produced by Rad Power Bikes, this 2019 model arguably comes with some acceptable tires.

Tires and Rims

In partnership with Kenda, these tires were made with a diameter of 20″ by 3.3″ width.

Aside from having a wider contact patch, you’ll also enjoy the featured K-Shield puncture-resistant liner.

This is the primary line of defense integrated inside the tire (under the tread) to provide extra protection in case you encounter a infamous nail.

These tires had to come with good rims too!

It is not uncommon to see most ebike models to come with double wall rims, which is the case to protect the fat tires. This is very important in case a spoke treats to damage the inner tube.

If you’re looking for to cruise off the road just as easily as it does on smooth terrains, then you’d be glad if you settled with the Radmini Step Thru.


“Off the road” means on dry hard gravel, not muddy or too soft terrains such as sand or snow. The Step Thru 2 version was also enhanced with better tires.

Gearing and Braking System

The braking system features Tektro technology; in this case, you will encounter a 180 mm front and rear brake rotors that will deliver immediate response when most required.

If you love adventures and look forward to uphill climbs, then you’ll surely find the DNP 7-speed, 11-34 tooth freewheel of this Radmini electric fat bike thrilling.

Riders can now create a wider range of gearing for different terrains. With a wheelbase of 45″, you can be sure of balance and comfort.

Tires Downside

I haven’t seen the first electric bike without downsides. For an ebike that can reach a high speed, the tires carving is NOT too appealing for me.


These tires might be really good when riding on dry asphalt – kind of similar to the Ducati city commuter ebike model tires offer,


if you have driven a motorcycle with slick tires before, you will know that they won’t provide the best performance on wet conditions.

The Radmini Step-Thru Bafang Motor

The accompanying motor is a crucial criterion for consideration when it comes to e-bikes, specially if it has a throttle feature.

Power and Torque

This Radmini comes with a 750W brushless Bafang geared hub motor, which is just enough to get its weight moving.

In terms of the torque, you can expect 80Nm, which is more than enough to get up and running from zero to max speed or support for uphill climb.


In general, this is more than enough on-demand power to take off easily from zero and reach top speed (32 km/h – 20 mph) in roughly five (5) seconds.

One unfortunate thing is that this folding ebike will most likely be regulated in most countries (specially around Europe) due to its power. Please check your local regulations before investing.

Pedal and throttle assist modes

Unlike earlier models developed years back, this is an electric bike with throttle and pedal assist features. It affords riders a solid boost when feeling like cruising all the way to their destination.

The pedal assist mode is a great alternative if you require to save some battery juice for a longer trip.

By the contrary, if your legs are not strong enough, the throttle mode is what you need.

Keep in mind that the more you use the throttle feature, the less range you will have in the long run.


If you want to learn more about throttle ebikes and what to consider before buying one, read our electric bike without pedal assist guide.

The Li-Ion Battery

Rad knows you need a quality battery to power a Bafang motor. In this case, 35 cells of Samsung battery were the go to give you peace of mind.

As with most electric folding fat bikes from Rad, it is endowed with a 48V and 672 Wh Lithium-Ion battery ready for 800 cycles.

To charge up the battery, you can connect the charger to a 110V or 230V AC power outlets.

I emphasize the voltage outlet. Some countries, like Australia, the standard power outlet is 230V.  

In term of charging times, expect around 5 to 6 hr to get it full again from drain. When charged, the battery range should be around 25-45 miles (40 to 72 km).


The battery’s weight is approx 3.5 kg (7.7 lb). By removing it, you could reduce the overall weight to 27 kg. Still high but easier to lift.

Rad LCD Controller

The Rad LCD controller could be one of the most complete ones in the market, but not too similar to the SW900 LCD Controller.

It is not uncommon to see pedal assisted and throttle ebikes with more sophisticated controllers.

LCD controller Settings?

As per usual, you go access speed, battery percentage, odometer, assistance level and battery watts (good if the battery is becoming faulty).

Rad Power Bikes LCD Controller

In addition to the above, you would need to access the following functionalities in order to operate the motor and battery efficiently:

  • Switching from KM or MPH.
  • Size of the wheels. Important for the sensor to indicate the right assistance level, cadence and speed.
  • LCD screen backlight level. Good for bright days.
  • Front and rear lights. Press the menu and the up-arrow bottoms at the same time to turn them on.

Lastly, to navigate through all the settings, you just need to press the menu bottom.

Pedal Assistance Levels

This controller has five (5) assistance levels:

  • 1 – No power (no assistance). Basically, it will allow you to use the RadMini Step-Thru as a standard fat ebike.
  • 2 – Eco, that offers 25% of power.
  • 3 – Standard at 50%.
  • 4 – Power that delivers 75%
  • 5 – Speed that will drain you battery fast at 100% power.

About the Radmini Step Thru Assembly – Folding Process

At first glance, the assembly and folding process is not straight forward. I recommend following this process:

  • Deploy the quick stand first. This will help to hold the ebike’s weight.
  • Unfold the pedals.
  • Push the stem all the way down. This will save you a headache.
  • Unlock the pin and spin the front end.

Be careful when spinning the front end. That section is fairly heavy so avoid a potential back strain.

My preference is always to remove the battery (less weight) and to put a cloth between the frame parts to prevent scratches or dents.

Lastly, don’t forget to strap up both section before lifting it up.

Should You Buy The RadMini Step Thru?

This Rad fat ebike is neither expensive, nor cheap, but it offers a great feature-set for a price.

Compare to other models in the same category, I would dare to say that this folding electric bike can offer more value than other more expensive ones.

You know, one of the main ones is having the throttle feature, which is perfect to get you up to speed in no time.

Unfortunately, this throttle feature will reduce the battery juice faster than normal, specially with the high weight.

Overall, the Radmini Step Thru fat electric bike is a good alternative if your budget is limited and still want to enjoy a nice ride in any type of terrain.

Images courtesy of Rad Power Bikes.

Is this electric folding fat bike up to your expectations? Rate below.

RadMini Step Thru


Frame & Components Quality


Braking Performance


Speed & Torque (motor)


Controller & Assistance


Battery Range


Overall Weight


Portability & Maneuverability


What we like

  • ✅ Affordable fat tire throttle electric bike.
  • ✅ Motor, battery and controller manufactured by well known brands in the industry.
  • ✅ Good speed and portability.

What we do not like

  • Way to heavy for a foldable electric bike.
  • Tires carving may not be the ideal for slippery conditions.
  • Front wiring too exposed, which could be bothersome (could get tangled).

Paul T

Hi all! I'm Paul, founder and driver of Electric Bike Advisor (EBA). Learning from scratch by repairing and putting together my standard bicycle, I thought it was time to know more about the electric world. Enjoy reading my most honest point of view through our reviews, and learning from our guides, which are researched by professionals in the industry.