How fast does the Supermach SM26 go?

It is rated at 40 km/h (25 mph) with the 750 W motor. Many areas cap e-bike assist at 20 or 25 mph, so check local rules before riding at full speed.

What is the real range on a charge?

The claimed range is about 38 miles. Expect less with heavy throttle use, hills, a heavy rider or cold weather, and more if you pedal in the lower assist modes.

Is it good for a heavy rider?

Yes. The aluminum frame is rated for 150 kg (about 330 lb), which is higher than many 20-inch e-bikes. Keep the tires and brakes in good condition at that weight.

How long does the battery take to charge?

About 3 to 5 hours with the included charger. The battery is a 48 V 15 Ah unit, so a full charge overnight covers most daily commutes.

Does it have a throttle or only pedal assist?

It lists both electric power and cycling modes, so you can ride on motor power or pedal with assist. Confirm the throttle setup with the seller if that matters to you.

How does it compare with a 26-inch e-bike?

The 20-inch wheels make it more compact and easier to mount, but they roll rougher and feel less stable at speed. A 26-inch e-bike is better for long open-road rides; this one suits shorter trips and tighter storage.