Yeestep M712: 720 Watt-Hours, and the Peak Is Either 750 or 970

The Yeestep M712 is a factory model number, not a shop you can walk into. The cards this desk opened on 24 October 2026 all say Guangdong, a 27.5-inch wheel, a rear hub, and 48 volts times 15 amp-hours. Forty-eight times 15 is 720 watt-hours. One card, titled as a 750-watt men’s mountain bike, prices the bike at $361 to $421 with a minimum of one piece, and peaks the motor at 750 watts. Another card, titled as a 970-watt commuter, prices it at $397 to $474 with a minimum of ten, and peaks it at 970 watts. A third, sold under Yeestep, Sisigad, TST, or an OEM name, prices it at $359 to $391 with a minimum of 89 and is the only attribute row that prints 720 watt-hours. Those are wholesale quotes. They are not a US checkout. This is a reading of the cards. It is not a SickEBike ride. It is also not the Mauser M712. That is a pistol.

Three cards, one model number

The shared sheet also prints a tire of 27.5 by 2.25 inches, a 7-speed derailleur, an LCD, an app, a 30-degree climb claim, a rider of 14 or older, and a max load of 204 kilograms. Two hundred four kilograms is 450 pounds. The net weight on the 750-watt card’s sheet is 30.5 kilograms, about 67 pounds, and the carton is 38 kilograms. A 450-pound load on a 67-pound bike is the number they printed. It is not a test this desk watched. The tire guide is why 27.5 by 2.25 is a trail tire, not a fat tire. The mountain guide is why a fork with no millimeter is not a travel number, and why an attribute that says “dual” is not a rear shock the sheet forgot.

Forty-eight times fifteen is 720. The watt-hour box often is not.

Forty-eight times 15 is 720. That is the tank, on every card that prints 48 volts and 15 amp-hours. The watt-hour page is the multiplication. Two of the cards then type 750 or 970 into the field labeled watt-hour. Those are the peak watts from the motor line, parked in the wrong box. The Dutch card is the one that types 720. Shop the volts and the amp-hours. Do not shop a watt-hour field that is a copy of the peak.

The charger, on the spec sheet, is 54.6 volts at 3 amps. Fifty-four point six times 3 is 163.8 watts. Seven hundred twenty divided by 163.8 is 4.4 hours, if the brick held that power the whole way, which a lithium charge does not. The sheet prints 5 to 5.5 hours. Five hours at 144 watts, or 5.5 hours at 131 watts, can sit next to a 4.4-hour ideal once the taper starts. The 750-watt card’s attribute says 3 to 5 hours. Three hours would need 240 watts. The 3-amp brick is not 240 watts. The 970-watt card’s attribute says more than 3 hours, which is true of almost any charger and is not a time. The charging page is why you keep the 5 to 5.5 and throw out the 3.

The pack is 720 watt-hours. The peak is 750 watts on one card and 970 on the next. A 3-amp charger does not refill 720 watt-hours in 3 hours.

Thirty-two kilometers an hour can be a class. Forty-five cannot.

Thirty-two kilometers an hour is 19.9 mph. Twenty-five is 15.5. Forty is 24.9. Forty-five is 28.0. The federal low-speed bicycle, 15 U.S.C. § 2085, is pedals, a motor of less than 750 watts, and less than 20 mph on the motor alone. A 500-watt rated hub is under 750. A peak of 750 is not less than 750. A peak of 970 is not less than 750. A throttle that stops at 19.9 mph can sit inside a US Class 2 if the motor in the box is actually under that federal line. The app line, 40 km/h of pedal assist, is 24.9 mph. The unlock, 45 km/h, is 28 mph. Neither is the federal motor-alone cap, and an unlocked throttle is not a Class 3 bicycle. Class 3 is pedal assist to 28, not a hidden mode. The US law pillar is the state layer. The Dutch card is the only one that splits the cap: 32 km/h for the US, 25 km/h for the EU, and then the same sentence still offers 40 km/h in the app. A 25 km/h European bike that an app opens to 40 is not a 25 km/h bike after the tap.

Level 0 on the sheet says 0 km/h and, in the same parentheses, a walk mode of 6 km/h. Zero is not six. The other steps are 13, 18, 23, 27, and then 32 locked or 45 unlocked. The sheet does not say whether those are throttle caps, assist caps, or both. It does say the pure-throttle top is 32 and the app pedal-assist top is 40. Three tops, plus an unlock, is not one class sticker.

Sixty kilometers is the throttle cell. Eighty is the pedal cell.

The sheet splits range at a 65-kilogram rider, about 143 pounds. Pure throttle is 60 kilometers, about 37 miles. With pedals it is 80 kilometers, about 50 miles. Seven hundred twenty divided by 60 is 12 watt-hours a kilometer. Divided by 80 it is 9. On a 27.5-by-2.25 tire, 12 watt-hours a kilometer at a 20 mph throttle cap is a claim that can sit next to a light rider on flat ground. Nine is the gentle end. The sheet does not name the assist level, the wind, or the hills. The range page is why a 65-kilogram lab rider is not a 200-pound rider with a bag. The attribute “more than 60 kilometers” is the throttle cell with the pedal cell deleted.

The motor is a rear hub. The 7-speed derailleur is for your legs. The hub does not climb in those gears the way a mid-drive would. The hub page is that split. The motor page is why 500 rated, 750 peak, and 970 peak are three sentences. The sheet does not say cadence or torque sensor. A Russian title says “48V sensor” and stops. Sixty to 70 newton-meters, or 70 to 80, lives only on the attribute rows. At the axle of a 500-watt hub, 70 newton-meters is a launch number if it is real: 500 divided by 70 is about 7 radians a second, a walking speed on a 27.5 wheel, not a cruising torque. It is still not on the spec sheet.

The public film is a 3-minute assembly

The brakes are the other unsettled part. The spec sheet says an electronic brake plus a hydraulic disc. One attribute says mechanical. The brake guide is why a cable disc and a hydraulic disc are different parts, and why “electronic brake” is a motor cutoff or a regen line until someone names the caliper. No card prints a rotor diameter or a piston count. The rear light is an LED on the 750-watt sheet and a reflector only on the 970-watt sheet. Buy the light that is on the bike.

Who it is for

Buy a Yeestep M712 only if the quote in front of you still says 48 volts, 15 amp-hours, a 27.5-by-2.25 tire, and a peak you have read on that same page, and if you are buying a quantity, not a single bike off a US floor. The tank is 720 watt-hours whichever peak they typed into the wrong box. Skip the 3-hour charge. Skip 450 pounds of load until someone publishes how it was measured. Skip 40 and 45 km/h if you needed a class bicycle. Skip dual suspension until the sheet grows a rear shock and a millimeter. Skip it if you wanted the Mauser. This desk did not ride it.