Is the Tern HSD S11 fast enough for commuting?

Yes. It is a Class 3 e-bike with Bosch assist up to 28 mph, so it keeps pace with urban traffic better than Class 1 rivals.

Can it carry a child or cargo?

Yes. The frame is rated to a 180 kg gross vehicle weight, and Tern offers child seats and cargo accessories for the rear rack.

How does it compare with a full-size cargo bike?

It is shorter and easier to store, but its 20-inch wheels and 28 kg weight make it less stable at speed and harder to lift than a longtail.

What is the battery range?

The 545 Wh battery is large for a compact bike. Real range depends on assist level and load, but most commuters get several days of city trips per charge.

Does it fold small enough for a train?

It folds to a compact package that fits most elevators and car trunks, though its weight makes frequent carrying onto transit a chore.

What comes in the box?

The bike ships with the battery, charger and standard pedals. Racks, child seats and bags are sold separately.

Where is the Tern HSD S11 cheapest?

At Freedom Folding and Electric Bikes, for $4,199.00, as of our latest check.

Where can I buy the Tern HSD S11?

9 stores we checked sell it, including Freedom Folding and Electric Bikes, Perennial Cycle, Tern Store USA, Clever Cycles Bike & Ebike Store, Seattle Electric Bike.

Tern HSD S11

Best price now

$4,199.00at Freedom Folding and Electric BikesChecked 52 min ago

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Price facts

Lowest price today: $4,199.00 at Freedom Folding and Electric Bikes (checked Nov 11, 2026).

What reviewers say

Owners of the HSD line praise the compact size, strong Bosch assist and cargo flexibility for city life. Common complaints center on the weight when lifting it and the firmer ride of small wheels.

What people mention

Size and storagePraisedOwners say it fits in small apartments and folds for transit and car trunks.
Motor powerPraisedRiders report the Bosch Class 3 assist handles hills and loaded trips with ease.
WeightCriticisedAt over 28 kg, owners find it awkward to lift onto racks or up stairs.
Ride comfortMixedThe suspension fork helps, but small 20-inch wheels still feel firmer than full-size bikes.
Cargo capacityPraisedThe high load rating and accessory mounts let owners carry groceries and child seats.
ValueMixedBuyers see the build quality, but some feel the price is high against basic compact e-bikes.

About the Tern HSD S11

The Tern HSD S11 is a compact folding electric bike for urban commuting and cargo carrying. It has a 6061 aluminum frame with a chromoly steerer, and the frame folds for storage. Tern sliding dropouts are part of the frame, and the design is patented.

A 545 Wh battery powers the bike, which reaches a top speed of 28 mph (Class 3). The Suntour suspension fork, made custom for Tern, has 70 mm of travel. The 20-inch Schwalbe Big Ben tires have RaceGuard puncture protection and ECE-R75 ebike certification.

The frame is EFBE Tri-Test approved to 180 kg (396.8 lb), which is also the maximum gross vehicle weight. The bike weighs 28.1 kg (61.9 lb).

Bike type

Electric folding bike

Intended use

Commuting, cargo

Frame

6061 aluminum, Tern HSD, folding

Fork

Suntour custom for Tern, 70 mm travel, chromoly steerer

Battery

545 Wh

Max speed