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Tern GSD S10

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Enormously Useful. Surprisingly Small.

The GSD is designed to carry two kids, a week’s worth of groceries, or 400 lbs of cargo, but it’s only 6 feet long—the same length as a standard ebike. With Tern’s best-in-class folding technology, it packs down small enough to fit in a VW Touran or an urban apartment. Plus, it adjusts to fit riders from 4-8" to 6' 4"—so mom, dad and the kids can all share it.


  • See-and-Be-Seen Geometry
    The GSD features a relaxed geometry that puts the rider in an upright, comfortable position. Swept back handlebars and ergonomic grips take a lot of stress off the neck, shoulders, and wrists. You’re also able to see (and be seen) over the tops of most cars, which is a great benefit in traffic. With Bosch power, comfort and performance can coexist.
  • Low and Steady
    The GSD is engineered from the ground up for maximum stability, loaded and unloaded. We designed it with a 125 cm wheelbase—25% longer than standard ebikes—for confident and balanced handling. Thanks to small wheels, a low frame, and centrally mounted motor, the bike boasts an extremely low center of gravity. Altogether, the ride is a revelation.
  • Safety First (Second and Third)
    Cycling is safer when you move at the speed of city traffic. Fast acceleration is a given with a Bosch Performance motor combined with smaller wheels. We’ve developed custom, virtually flat-proof, Schwalbe tires to give sure-footed stability on even the nastiest roads. Add super-bright LED lights, reflective decals, and a see-and-be-seen riding position, and you have a bike optimized for safety.
  • Stable Standing
    Parents know that loading kids on and off a bike is tricky business. That’s where the German-made Hebie kickstand comes in. It supports up to 80 kg, with two widely spaced legs for super stable support. So go ahead, breathe easy and use both hands to load (and lock) your precious cargo.
  • Sell the RV
    The GSD is an awesome touring machine. It’s got room for six Ortlieb bags (4 on the rear rack and 2 on the front), and a range of up to 150 miles. A bit of careful packing lets you bring a full touring load, together with a little passenger. That means two GSDs let a family of four tour the world, no bike trailer required.


  • WHEEL SIZE: 20" wheels
  • SPEEDS: 1 x 10
  • WEIGHT: 27.06 kg (59.66 lb) w/ 1 battery
  • FLATPACK DIMENSIONS 173 x 40 x 83 cm (71" x 16" x 33”)
  • PACKING TIME: 5 sec
  • TOTAL LENGTH 181 cm
  • SUGGESTED RIDER HEIGHT: 150 - 195 cm (4'11" - 6'5")
  • MAX GROSS WEIGHT: 200 kg (400 lb)
  • FRAME Tern GSD, 7005-Al, patented MultiTruss design
  • FORK Tern GSD, 1.5" Taper, Boost Thru-axle, 110 mm, 6061-AL
  • HANDLEPOST Tern Physis 3D (G2), 3D forged, 5 patented technologies
  • STEM Tern Andros (G2), adjustable, forged construction, patented technology
  • HEADSET Tern Flux Pro Taper, 1.5", angular contact bearings, Physis integrated
  • HANDLEBAR Tern Sweep, 27 degrees, 6061-Al, Tern Andros adapted GRIPS Ergon, for swept bar
  • SADDLE Tern GSD, with rear handle
  • SEATPOST Tern Telescope, 34.9 mm, 2014-Al
  • BRAKES BRAKE Magura MT5, 4-piston hydraulic disc, 180 mm rotor
  • BRAKE LEVERS Magura, hydraulic
  • FRONT & REAR WHEEL Tern Atlas, heavy duty cargo wheel
  • FRONT HUB Tern Atlas, Boost thru-axle
  • REAR HUB Tern Atlas, Boost thru-axle, ebike reinforced design
  • RIMS Tern Atlas, ultra wide 36 mm, dual reinforced joint
  • TIRES Tern x Schwalbe Super Moto-X, 62-406, Green Guard puncture protection, Reflex
  • SHIFTER(S) Shimano Deore, 1 x 10 speed
  • REAR DERAILLEUR Shimano Deore Shadow+
  • CRANKSET Tern GSD custom, forged 6061-AL DH crankarm
  • CASSETTE/FREEWHEEL Shimano 11-36T, 10 speed
  • BOTTOM BRACKET Motor integrated
  • PEDALS Urban with non-slip surface, sealed bearings
  • CHAIN 10 speed, DHT for eBike, GST corrosion resistant coating
  • SHIFTER CABLE & HOUSING Jagwire LEX-SL, slick treatment, alloy ferrules
  • MOTOR Bosch Performance, Max speed 25 kph (EU); Max speed 20 mph (US)
  • BATTERY Bosch Dual Battery system, 400wh/500wh/900wh
  • RANGE Single Battery: 400 Wh: 50-110 km (31-68 mi); 500 Wh: 60-140 km (37-87 mi)
  • DISPLAY Bosch Purion, 4 mode selectable, walk assist
  • BELL Aluminum
  • CHAINGUARD SKS Chainblade
  • KICKSTAND Heavy-duty double stand, 80 kg capacity
  • LUGGAGE SOCKET Barrel Mount
  • FRONT LIGHT Tern Valo, integrated, 41 lux/150 lumens
  • REAR LIGHT Herrmans H-Trace, for eBike
  • FENDERS SplashGuard, stainless hardware
  • RACK(S) Frame integrated, heavy duty design
  • PANNIER BAGS SideKick Cargo Hold x 2, 62 L (optional)
  • PASSENGER FOOT SUPPORT SideKick retractable foot pegs (optional)
  • FRAME LOCK MOUNT 2 positions: rear wheel and front fork for Abus Shield 5650 (lock not included)


The Tern GSD is one size and fits riders from 142cm - 193cm (4'10" - 6'5")

What's included?

Your new e-bike will be fully prepared and check by our workshop technicians. You can be sure that everything has been dialled in for optimum performance. All our electric bikes come with a user manual, keys, charger & a free check-up service after approx 200km and within 3 months.

All our electric bikes include a 5yr warranty on the frame, 2yr warranty on motor & battery & 1yr warranty on components. In the event of a problem, we deal with all warranty claims in-house. We also offer free Bosch and Shimano updates and diagnostics.

* E-bike range is dependant on many factors inc rider weight, wind, hills, terrain etc. For a better estimate of your bike's range, please see our e-bike range page.


Good Rotations is an independent bicycle shop. Our aim is encourage the use of bicycles for everyday journeys and bigger adventures and to grow and expand the cycling culture where we live. We want you to love your bike!

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