Tern HSD S+ 2021 – Electric Folding Bike



    Enormously Useful. Surprisingly Smaller.

    The HSD is mighty but mini: It’s easy to handle, easy to share, extremely comfortable to ride, carries a whole lot of cargo—and all of this in a compact design that’s shorter than a standard bicycle.

    Easy to Handle

    Whether you’re riding, storing, or moving it around, the HSD is a breeze to handle. It’s shorter than a regular bike and its weight is the same as a regular ebike.

    Automatic Shifting

    The new Enviolo AUTOMATiQ system does all of the shifting for you, so you can worry less and bike more. All you need to do is pedal. It’ll shift up as you accelerate from a standstill, and shift down when you reach a stoplight. Set your desired pedaling cadence on the integrated Bosch Intuvia controller and let Enviolo do the rest.

    Flat Fold

    Fifteen seconds and the HSD transforms into a flat package that’s perfect for fitting into SUVs, station wagons, or bus storage compartments.

    Ready to Haul

    Despite its diminutive stature, the HSD is a mid-sized cargo bike with some serious hauling capacity. With a maximum gross vehicle weight of 170 kg (374 lb) and an XL-sized Atlas H Rack, it’ll carry a week’s worth of groceries or camping equipment for the weekend. It even has a dedicated trailer mount, so adding extra cargo is a cinch.

    Vertical Parking

    The HSD flips up for convenient vertical parking. Take it upstairs in an elevator and park it inside at home or at work—it needs just a wee bit of floor space.

    A Comfier Ride

    With a longer wheelbase and extra-low center of gravity, the HSD is smoother and more stable than your standard ebike. Easy-Step frame design paired with an adjustable stem and seatpost offers a comfortable upright riding position for both taller and shorter riders. Add a suspension fork and balloon tires and even the meanest cobblestone roads are comfortably navigated.

    Key Features:


    • Next-generation Bosch® Performance Line motor with Intuvia display
    • 500 Wh battery for a range of up to 118 km (74 mi)
    • Integrated automatic shifting
    • Enviolo Sport 380 hub
    • Custom Suntour suspension fork
    • Cane Creek® Thudbuster ST suspension seatpost
    • Magura® MT4 hydraulic disc brakes
    • Gates Carbon Drive® CDX belt
    • Abus® keyed-alike frame lock
    • Fits riders from 150 to 195 cm (4’11” – 6’5”)
    • Fits one Thule® Yepp Maxi, Yepp Nexxt Maxi, or Bobike® GO Maxi child seat—no adapters needed

    Occasionally, without notice, manufacturers change product design and/or specifications.


    Frame: ern HSD, 6061-AL, patented design, Tern sliding dropouts, EFBE Tri-Test approved: 170 kg
    Fork: Suntour custom for Tern, 1.5″ tapered Chromoly steerer, 32 mm stanchions, Thru-axle, 70 mm travel, EFBE tested for 170 kg
    Headset: Tern Flux Pro Taper, 1.5″, angular contact bearings, Physis integrated
    Stem: Tern Andros (G2), adjustable, forged construction, patented technology
    Bars: Tern Sweep, 6061-AL, Tern Andros adapted
    Front Brake: Magura MT4, hydraulic disc, 180 mm rotor
    Rear Brake: Magura MT4, hydraulic disc, 160 mm rotor
    Brake Lever: Magura, hydraulic
    Shifters: Enviolo AUTOMATiQ
    Speed: 1
    Rims: Tern Atlas H, wide 35 mm
    Front Hub: Novatec, Thru-axle, sealed bearings
    Rear Hub: Integrated automatic shifting
    Spokes: Stainless steel, double-butted
    Front Tyre: Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification
    Rear Tyre: Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification
    Seat Post: Cane Creek Thudbuster ST, Tern Telescope, 34.9/30.9 mm
    Saddle: Tern HSD
    Chainset: Tern HSD custom, Gates CDX CNC machined beltring
    Bottom Bracket: Motor integrated
    Chain: Gates Carbon Drive CDX belt
    Cassette: Gates CDX, precision CNC machined cog
    Pedals: Urban with non-slip surface, sealed bearings
    Weight: 26.7 kg
    Battery (Wh): Bosch PowerPack 500
    Motor: Bosch Performance (Gen 3), max speed 25 kph
    User Interface: Bosch Intuvia, 4 mode selectable, walk assist, integrated auto/manual shifting




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