The Bafang M620, also known as G510 & Ultra, is a high-power, large-capacity mid-drive motor introduced by Bafang in 2018. Since then, it has undergone multiple updates and improvements to its controller and transmission system. Many manufacturers of electric bikes (including our Frey bike models) choose to use it as the Bafang eMTB drive system, not only because of its outstanding performance in mountain bike riding but also because Bafang offers customizable options to meet the demand of mountain bike riders for more power.

 

As for the performance of the Bafang M620, you can refer to the review of EX by Michael (it may be somewhat different from the current M620, after all, this review was published in 2020, and Bafang would improve their motor every year):

Powerful: 1000W nominal, 1500 peak, tunable pass 2000W.  While torque remains constant at 160 Nm in stock form, the nylon gear was replaced with steel to allow DIY's to overdrive the motor far pass it's factory specification. In some applications utilising aftermarket controllers from EXCESS, ARCHON X1, Phaserunner from GRIN and higher voltage battery it is pushed pass 2000 Watts.

Integration: M620 max is quite bulky! It comes with mounting bracket, this allow for better, more sophisticated integration and freedom in bike geometry.

Weight: M620 Mid motor weighs around 5.3 kg (according to the Bafang in 2022, the current weight is 6.7kg). It is one of the heaviest on the market. Good it's close to the ground!

Torque sensor: High speed torque sensor to deliver accurate assistance over a wide cadence range. Sprinting over rocky field or pedalling at an even cadence down the road? You have 9 levels of pedal assist, select the support that feels natural.

Better design: Bafang frequently updates it's firmware and hardware to refine the M620 motor based on feedback and new developments. There are constant and incremental improvements as time goes on.

Smoother: Not. Poorly refined controller result in lots of power fluctuation, delays and overruns. There is lots to improve here.

Quiet: unfortunately not. The new motor has some noise issues – especially on full power at 1500W, comparing to Euro market leaders running 250W.

Narrow: the Q-factor (distance between the cranks) is 175 mm is reasonable and provide

natural pedalling sensation. The narrower, the better.

Greater capacity: There are many battery options depending on the builder of the bike choice. Frey EX for example come as 672Wh or 1344Wh in twin battery configuration.

Hello tuning: Tuning software, controller replacements, higher voltage battery are most popular. While the motor mechanics are over-engineered and can take far over 2000W, other elements often modified to allow motor to operate beyond OEM specification.

 

As a partner in many directions, many of Frey's e-bike models are integrated with the Bafang eMTB M620 motor, such as the EX and EX Pro, especially the Beast, which can reach a peak power of 1800W through programming.

As Frey's most powerful mid-drive electric mountain bike, Frey Beast as a Bafang M620 e-bike can easily climb steep mountain roads and overcome complex obstacles. Frey Beast uses a large-capacity battery pack that can provide up to 120 kilometers of riding distance, allowing riders to explore with more confidence. The carbon fiber and aluminum alloy frame has good strength and stability, as well as excellent corrosion resistance.

 

Similarly, the Frey EX also provides powerful assistance, and with the option of a second battery, it can take you to the highest and steepest mountain peaks, making it an excellent choice for MTB enthusiasts. On open roads, it is an excellent electric mountain bike with balanced and stable handling.

Other models that also use the M620 motor include the AM1000 (V5 and V6), CC FAT, and HUNTER (which are fat tire bikes), as well as the Savannah series HT1000 and CC (which are suitable for hybrid riding). The motor can provide perfect braking performance for them, combined with stable frames and long-lasting battery capacity, making them a popular choice for electric mountain bike enthusiasts.

 

Wanna know more about Bafang M620? Check out this collection of reviews: Collection of Frey Bike Reviews

 

Again, We sincerely hope you can  Free Ride & Enjoy Yourself!