Manufacture: QuietkatQuietkat Quantum

Model: Quantum (2019)

Type: Downhill Mountain Bike

Price: $6199



  • Professional Mid-Drive Design
  • Made to Last – Quality Suspension & Parts
  • 750w – 1000w Options – More Torque & Speed
  • Conquer Your Mountains!
  • Lower Maintenance, Less Hassle
  • Power vs Output: Balance is Key
  • Specs
  • Conclusion



⚡ Affiliate Disclosure ⚡

As the Owner of Radical Electric Bikes, I enjoy finding the best deals on E-bikes and Gear to review providing accurate and unbiased information to you, the visitor and my welcomed guest. I use affiliate links on most of my posts and videos. When you decide to buy a product after clicking on one of these links, I get paid a small commission and you get a great deal on a new E-bike, Scooter, accessories & other great gear. It’s a win-win! Full Affiliate disclosure can be read here.



Professional Mid-Drive Design

With rear or front hub motors, maneuverability can feel limited or weighted on the front or rear where the motor is positioned. To translate that power and weight into a more balanced design, having the motor sit with the crank and synchronized with the pedaling for a more efficient response is easier on the drive train and more effective at delivering that boost when you need it most.

The Quetkat Quantum’s motor does not use speed sensors, or cadence sensors for motor action, this motor uses a torque sensor. This torque sensor in the motor gives a smooth on and off feeling more like a traditional bike. The torque sensor eliminates the sudden and discomforting movement (jerk / lag)  that you get from the motor turning on and off based on speed. The motor delivers power output on a parabolic curve, which is much smoother and more responsive to the power you are pressing into the system through the pedals.

QuietKat Quantum

Nice stance bro. ?

Made to Last – High Quality Suspension & Parts

A similar frame design like the Emojo Cougar, having a more head-on take to the mountain bike style for ultimate downhill fun. 90% of downhill is rolling over loose and unpredictable terrain that can give away when rolled over on a bike. This requires a highly tuned suspension system, the Quantum has 150mm of rear and front travel for optimal adjustability.

Alongside the high-powered 750w or 1000w options, soild 4 piston hydraulic brakes gives the user a very smooth operation and experience. Close calls happen on the trails making serious braking power a necessity. For newer riders, make sure you read the details below!

Quietkat Quantum

The eyes on the frame look pretty slick!

750w – 1000w Options – More Torque and Speed

500 watts of power is already a lot of assistance. Moving up to the 750w – 1000w range is a lot of fun but should be approached with the awareness of the added torque and speed capabilities. With it also being a mid drive design, delivery upon pedaling is instant.

The rpm of a bike crank can range from 50 to about 100. The motor matches the revolutions per minute to such a degree that the smoothness compared to a rear or front hub motor makes mid drive types superior. For the best traction and control are the large 27.5′ x 2.8′ tires that handle all situations regardless of the season.

Conquer Your Mountains!

The efficiency of hill climbing can also be noticed when taking the Quantum out for a rip into the woods or neighborhood. It’s a no brainer that with such immediate power delivery and no extra parts to move, this makes the range even better with so much more power than a regular E bike that uses the same type of Lithium battery, but a hub type motor instead.

Power is wasted with the hub motor design. The Quantum’s mid drive system is proven & tested and more efficient all around. A recommendation to novice riders who are unsure about handling such power: A better option might be a bike like the Emojo Cougar or Wild Cat. These are hub designs, which are not as quick to deliver the power and feel more traditional when pedaling having the crank move the chain first to then engage the motor.

Lower Maintenance, Less Hassle

Electric bikes are naturally low maintenance when equipped with a Lithium battery. The development of mid drive motors was to keep in mind the objective of getting the maximum torque, speed, range, and lowest wear & tear possible on the system as a whole.

When parts can communicate harmoniously, power flows at a healthier rate making it less stressful on the entire design. Being the 2019 model, The Quietkat Quantum is packed with the newest proven and reliable components that a more seasoned rider is looking for.

QuietKat Quantum

Whip through the trail with ease!

Power vs Output: Balance is Key

The time to charge the Quantum’s 48V 14.5ah Panasonic Lithium battery is 4 – 5 hours. It should be recognized that a higher output motor means it draws more power than a smaller one, making the range on the Quantum a total of 25 miles or 40 kilometers. It’s top speed is also 25 miles or 40 kilometers per hour.

Even though it is less stressful on the drive train being mid-drive, it’s the output vs the voltage that matters. This should show you how the Power vs Output plays as a whole regarding any motor and battery. Being a Panasonic battery, the quality is of top tier. A lot of Lithium batteries in electric bikes are of lower quality, still better than a lead acid type any day though!



  • 750w or 1000w Ultra mid-drive motor options.
  • 48V 14.5ah Panasonic Lithium Battery
  • Digital display screen.
  • Two frame sizes – 17.5″ medium and 19″ Large.
  • 4 piston 203mm Hydraulic Brakes.
  • Front and Rear 150mm Rock Shoks Suspension.
  • 27.5′ x 2.8′ Tires.
  • Wide-Range 9 speed Stainless Steel Drivetrain
  • Weight of 55 lbs
  • Max rider weight 300 lbs.
  • Top speed of 25 miles or 40 kilometers per hour.
  • Range of 25 miles or 40 kilometers.


More advanced, more power and performance = more money in the end. That is what to expect when shopping for a higher quality bike or any product for that matter. You get what you pay for! Not to say our earlier recommendations are of lower stature because they are less money, but to show a more unbiased comparison that reflects what you get when more recognized brands like Panasonic are in a bike or product like the Quietkat Quantum. Without question, the Quantum is made to last for the advanced rider and can also be adapted to spec for all other E bike enthusiasts that want more bang for their buck. Make sure to leave any questions you have about the Quietkat Quantum in the comments below!

2019 Quietkat Quantum Mountain Bike


Build Quality


Safety Options


Extras & Accessory Compatibility



  • Available in two frame sizes 17" and 19".
  • Two motor options available: 750W and 1000W (Ultra models).
  • Hydraulic Disc Brakes.


  • High ticket E-Bike (Not recommended to those on a budget).
  • More expensive to repair and replace parts when needed (they are of high quality).
  • Weighs the about same as a cheaper E-Bike (55 lbs). The next model (2020) could be lighter!

Share this information with your friends and family!

Cole McLeod


  1. Reply

    Very interesting post, it was very clear and visually appealing with all of the pictures you included. Lots of great details and the review was easy to read. Well done!

    • Reply

      Glad you enjoyed reading my review Brandon! It’s one of my core values to provide transparent and helpful reviews to all that need them 🙂

      – Rowan @ Radical Electric Bikes

  2. Karen Kennedy


    Wow!!!! So awesome…I had no idea these bikes existed. They seem pretty pricey though. Do they come in different price ranges?

    • Reply

      Hi Karen! Yes they come in the range of $700 all the way up to $6000+. Many bikes share similarities like motor power, battery size and placement… Aside from factors like materials, branding, etc. What type of bike are you looking for?

      – Rowan @ Radical Electric Bikes

  3. AJ


    I like the full breakdown you’ve given on the Quietkat Quantum 2019 Mountain bike. With myself being a multiple year bike rider, I would definitely consider purchasing a bike of this calibur. I look forward to seeing the other bikes that you critique in the future. Great job

  4. Jukka


    Now this seems like a nice little toy! I’ve been thinking about replacing my car with an electric bike. I think someting like this could do it. It needs to have enough range to handle whole days traffic and enough power to handle hills we have here. It would also have to be able to handle snow as I live up north. Does this have two-wheel traction by the way or is it just the rear wheel that gets power from the centerline engine?

    Electric bikes are evolving at such a huge pace that I’ve been thinking about when we get electric motorcycles. That would be a fun form of transport and a ton cheaper than an electric car. Do you know if there are any on the market yet? You could do a piece on them!

    • Reply

      Yes the Mid-drive design delivers power with the drive train as you pedal to deliver accurate assistance and at the desired level depending on the setting it is placed on.
      Having more power and no lag when you try to push on the pedals gives you better control and balance.

      The Quantum can handle snow, mud and loose terrain like gravel and debris. When I was in Whistler, I LOVED the mid drive in the tight corners and making powerful strides up hills like they were nothing!

      And yes, there are electric Motorcycles! Like the Harley Davidson Livewire, Zero Motorcycles, and many others! I have plans in the works for reviewing these wonderful marvels in the near future 🙂

      – Rowan @ Radical Electric Bikes

  5. Reply

    Found this post to be very helpful. Didn’t remember there was such a thing as ebikes and after reading this, it seems like something I would really enjoy when the weather is nice outside. I can see some lazy people, such as myself taking advantage of the fact that it runs on electricity, though it would be great to have the option to switch to completely manual pedalling.

    Does this still provide the same amount of exercise as an old style bike would, one that you have to pedal all the time to keep moving? Can it be used solely on pedal power or even just on electricity?

    I am a noob when it comes to ebikes, I apologize if these questions have pretty obvious answers.

    • Reply

      No worries, I am happy to answer all of your questions!

      Yes you can pedal these bikes entirely without the assistance of the battery. Do keep in mind though if you get a fat tire bike or another with a thicker and heavier frame, you will want to have that electric assist handy on the hills.

      – Rowan @ Radical Electric Bikes

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