Tern HSD S9i Sport

What the Tern HSD S9i Sport is built for

The Tern HSD S9i Sport is a cargo e-bike built to carry shopping, gear or children.

It has a 300 W mid-drive motor, 90 Nm of torque and a top speed of 28 mph (45 km/h).

It carries a 545 Wh battery and a stated range of up to 64 miles (103 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 HSD S9i Sport weighs 64 lb (29 kg), carries up to 419 lb (190 kg) including the rider and has front suspension.

In the United States the Tern HSD S9i Sport sells for $7,499, above the median of $2,399 across 40 cargo e-bikes with a US price, among the premium models. That is $14 per watt-hour of battery.

Where the Tern HSD S9i Sport may be ridden

Tern HSD S9i Sport is sold as Class 3 (pedal assist up to 28 mph) under the three-class system most US states use. Class 3 e-bikes are kept off some bike paths and trails, and several states set a minimum age and require a helmet for them.

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 28 mph (45 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 HSD S9i Sport safety certification

The brand states that the Tern HSD S9i Sport 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.