An elite-tier electric cargo bike with extreme capabilities. The Tern GSD S10 fine-tunes an already stellar platform into one of the smoothest, sturdiest, and most modular long-tail cargo bikes around.

The Tern GSD lives up to its name and it Get’s Stuff Done. Few bikes have ever felt so genuinely useful. Now in its third generation, this cargo hauler excels across an incredible range of use cases, boasting enough features to rival the versatility of your smartphone.
It’s built like a tank but rides like a dream. The unique frame design remains rigid even under heavy loads, and those loads can be substantial. With a 463-lb maximum payload and 220 lbs rated for the rear rack alone (with independent certifications to prove it), the GSD is engineered for serious work.
Yet hauling all that weight feels quite easy. The Bosch Cargo Line motor delivers 85Nm of torque and up to four times your pedal input, making climbs and takeoffs smooth and controlled. Paired with 20” wheels that lower the center of gravity, it stays impressively balanced, even with an adult passenger or two kids riding in back.
The S10 trim (our test model) packs layer after layer of thoughtful features, and none of them feel frivolous. It’s a premium machine with serious peace of mind built in: a café lock to secure the front wheel, motor and battery disablement via smartphone, real-time motion alerts, and even an audible theft alarm.
Fit and comfort are equally dialed. Despite its one-frame design, Tern’s proprietary telescoping seatpost and adjustable stem make it easy to fine-tune your setup in seconds. A suspension fork and Cane Creek suspension seatpost smooth out bumps, while 4-piston hydraulic brakes with anti-lock tech give confident, controlled stops.
Functionally, the GSD is a masterclass in practicality. It can stand upright for compact storage, power accessories through its 12W charging port, tow trailers or even another bike when pair with an enormous catalog of Tern accessories (which also includes waterproof panniers and passenger kits to sun shades). Not to mention, those accessories are easy to use thanks to a locking kickstand that keeps loading steady.
I’ve heard “we rethought this from the ground up” from plenty of brands, but it’s never felt truer than here. The GSD is one of the most thoroughly executed cargo e-bikes I’ve tested. Sure, it’s heavy and not cheap, but genuine drawbacks are few and far between. Still not convinced? Check out our test data and full breakdown below.
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