Tern GSD S10

What the Tern GSD S10 is built for

The Tern GSD S10 is a cargo e-bike built to carry shopping, gear or children.

It has a 300 W mid-drive motor, 85 Nm of torque and a top speed of 20 mph (32 km/h).

It carries a 1,090 Wh battery and a stated range of up to 122 miles (196 km) on a charge. Real-world range is usually lower than the rated figure: it falls with throttle use, hills, cold weather, rider weight and higher assist levels.

The Tern GSD S10 weighs 82 lb (37.3 kg) and carries up to 463 lb (210 kg) including the rider.

In the United States the Tern GSD S10 sells for $7,999, above the median of $2,399 across 40 cargo e-bikes with a US price, among the premium models. That is $7 per watt-hour of battery.

Where the Tern GSD S10 may be ridden

In the European Union and the United Kingdom an e-bike counts as a bicycle only within the pedelec limits; as specified, its 300 W motor is above the 250 W limit and its 20 mph (32 km/h) top speed is above the 25 km/h at which assistance must stop. A model above those limits is treated as a moped there, with type approval, registration and insurance, unless the brand sells a version set to the European limits.

Tern GSD S10 safety certification

The brand states that the Tern GSD S10 is certified to UL 2849.

UL 2849 is the US safety standard for the whole electrical system of an e-bike: battery, charger, motor and controller tested together.

New York City allows only e-bikes certified to UL 2849, with batteries certified to UL 2271, to be sold or rented there; California requires e-bike batteries to meet UL 2849 or EN 15194 from 2026.