Ringmaster S-HJ8 1000W Electric Bike Conversion Kit - Is It Easy to Install?

A powerful and cheap way to electrify your bike at $140, but you'll need to buy a battery separately and be comfortable doing the installation yourself.

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Best For

How this e-bike scores for different riding styles

High Performance
75/100

The 1000W motor delivering 33 mph (53 km/h) top speed with 440 rpm rotational speed and >80% efficiency offers strong performance credentials. The 48V system and brushless design provide reliable high-output power delivery.

Cargo & Utility
60/100

The 36-spoke wheel design with 264 lbs weight capacity and 1000W motor provide solid hauling power. However, no rear rack is included, and the kit format requires users to source their own cargo accessories.

Off-Road Adventure
55/100

The 1000W brushless motor with 45N.M torque and 264 lbs weight capacity offers decent power for trails, but lacks suspension and fat tires needed for serious off-road riding. The kit format allows installation on mountain bikes.

Recreational Leisure
50/100

The 33 mph speed and smooth brushless motor operation make it suitable for casual rides, but the lack of included battery and basic features limit its out-of-box recreational appeal. Requires significant DIY setup.

Daily Commuting
45/100

This is a conversion kit, not a complete e-bike, lacking battery and display which are essential for commuting. However, the 1000W motor and 33 mph max speed provide adequate power for urban travel once installed on a suitable bike.

Compact & Portable
20/100

As a rear wheel conversion kit weighing 22.9 lbs, this product is not designed for portability. It has no folding capability and is meant to be permanently installed on a bicycle frame.

Our Verdict

The Ringmaster conversion kit is a budget way to add electric power to your regular bike. For only $140, you get a strong 1000W motor that can push you up to 33 miles per hour. The motor runs quietly because it's brushless, and it's built to last with parts made from aluminum, iron, and copper. The wheel has 36 spokes arranged in a special pattern that makes it strong enough to carry 264 pounds. It also comes with built-in lights and special brake handles that turn off the motor when you squeeze the brakes. The 3-year warranty is longer than many cheap e-bike parts offer.

This kit works best for people who already have a 26-inch bike they want to upgrade and aren't scared of using some tools. It's perfect for riders who want to save money by building their own e-bike instead of buying one ready-made. The powerful motor makes it good for getting up hills or carrying heavy loads. If you need to go fast on your daily rides or want a workout bike that can also help when you get tired, this could work well. However, you need to be ready to spend extra money on a 48V battery and know how to install everything yourself.

This kit has some big drawbacks you should know about. The biggest problem is that no battery comes with it, so you'll need to buy one separately for $200 to $400 more. There's no screen to tell you how fast you're going or how much battery is left. You can only use this on bikes with 26-inch wheels, which means it won't fit many modern bikes. If you're not handy with tools or don't want to deal with wiring and installation, you should probably just buy a complete e-bike instead. People who want something ready to ride right out of the box or need a warranty that covers the whole bike should look at other options.

What We Like

  • Super affordable at just $140, making it one of the cheapest ways to turn a regular bike into an electric one
  • Powerful 1000W motor can reach speeds up to 33 mph, which is faster than most budget e-bikes
  • Strong weight limit of 264 pounds means it can handle most riders plus some cargo
  • Comes with a 3-year warranty which is really good protection for such a low price
  • Has power-off brake handles that cut the motor when you brake for safer stops

What Could Be Better

  • You have to buy the battery separately, which means spending at least another $200-400 on top of the kit price
  • No screen or display to show your speed or battery level while riding
  • Installation requires tools and bike knowledge - not a ready-to-ride solution for beginners
  • Only works with 26-inch wheel bikes, so you need to make sure your bike is the right size first
  • Missing UL safety certification which some buyers look for in electric bike parts

Standout Features

1000W brushless motor with 33 mph top speed
Matches or exceeds many complete e-bikes costing 5-10x more in raw motor power
Exceptionally low $139.99 price point
One of the most affordable electric bike conversion kits available, 70-80% cheaper than complete budget e-bikes
3-year manufacturer warranty
Double or triple the typical 1-year warranty found on budget e-bike components

Full Specifications

Build & Frame

Wheel Size26 inches

Weight & Capacity

Max Rider Weight120kg

Features

Included Features

Integrated Lights
Pedal Assist
Throttle

Not Included

App Connectivity
Cruise Control
Fat Tires
Fenders
Foldable
LCD Display
Rear Rack
Removable Battery
Suspension
UL Certified
USB Charging
Walk Mode

Frequently Asked Questions

Common questions about Ringmaster Electric Bike Conversion Kit 48V 1000W Rear Wheel Electric Bicycle Motor Kit E-Bike Hub Motor Conversion Kit for 26 Inch Bike

Does this kit come with a battery?

No, the battery is not included. You need to buy a separate 48V battery to power this motor kit.

How fast can this motor make my bike go?

The motor can reach a top speed of 53 km/h, which is about 33 miles per hour.

What size bike wheels does this fit?

This kit only works with bikes that have 26-inch wheels. Make sure to measure your bike before buying.

How much weight can this handle?

The kit can support up to 120 kg or about 264 pounds, including the rider and any cargo.

Is this hard to install on my bike?

The product is a conversion kit that requires tools and some mechanical knowledge to install. It's not pre-assembled or ready to use right away.

Scores

Overall Score 52/100
Value Score 88/100
Popularity 45/100

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Tags

conversion kit budget friendly high power motor diy required battery not included 26 inch wheel 1000w motor brushless motor

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