Tern GSD S00

Tern GSD S00

from 4,999.00

Tern Takes another turn on the GSD, adding Bosch CX Drive and internal hub shifting.

The GSD can carry 2 kids, fit in your apartment, fit on a standard bus rack or easily in the back of a minivan.  Why?  Because it's no bigger than a standard bike, but ingeniously designed to do so much more.  Features Bosch Performance Line and optional Dual Battery setup.

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Visit our Seattle location to get to know this bike in person. Our friendly staff will help you learn everything you need to know to make an educated investment in your next family bike.

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The Tern GSD is a category disrupting design bike that takes cues from cargo bikes, electric bikes and folding bikes. Similar in length to the Benno Boost and Bike Friday Haul-a-Day, some might argue that the GSD bests both of these with respect to overall functionality. 

Tern uses 20" wheels front and rear to shrink the overall length of the bike to just under 72" - about a foot shorter than longtails like the Yuba Spicy Curry or Xtracycle EdgeRunner.  Nevertheless, with a few exceptions, the overall capacity of the GSD relatives to it's longtail predecessors is comparable. Two small kids fit easily on the back of the GSD using Yepp child seats.  One adult can fit comfortably as well.  Two mid-sized kids, and two larger kids will not fit comfortably on the GSD given the overall space available for passengers and their feet.  As well, no Hooptie is currently available for the GSD making safe portage of mid sized passenger(s) more complex.

That said, this bike rides incredibly well, has incredible cargo options and accessories ready to go, and is built to last.  We are super excited about this bike and believe that for many families in the Seattle area, this bike will be a true contender as they weigh their options.


The main differences between the GSD S10 and the S00 can be summarized simply: motor & drivetrain. The motor on the S00 is the Bosch CX Drive - Bosch’s highest torque model (75Nm) for maximum acceleration and climbing strength - if you have a hilly commute, CX Drive should be a consideration. The shifting on the S00 is an Enviolo (formerly Nuvinci) hub that uses a twist shifter and a continuous ramp from low to high gears with no perceptible gear steps - shifting that’s smooth and responsive, and a great pairing with a Bosch motor.

Notably, the GSD also comes with a 500 Wh hour battery, standard, and also includes a pair of Tern Cargo Hold panniers.


  • Featuring Bosch CX Drive motor. The highest torque motor from Bosch offers great climbing power and efficiency, reliability and minimal noise.

  • Optional Dual Battery yields crazy range. The GSD S00 comes stock with one 500 Wh battery. You can upgrade with an additional 500 Wh battery pack to double your range, with upper limits over 100 miles per double-battery charge. Batteries lock to frame for security, and battery location on the GSD is low and central for great handling.

  • Internally geared hub is smooth and silent. Featuring an Enviolo continuously variable internally geared hub (IGH), a gear shifting system built within the rear hub that offers a continuous flow from gear to gear (rather than discreet steps). Twist the grip to make it easier or harder - to climb hills or accelerate.

  • Plenty of kid and cargo options...carries up to 6 panniers! Take it to the kids' school, take it to the office, take it to the grocery store or lumber yard, even take it camping. The GSD offers you so many options, all at a competitive price.

  • Stand it on end if your space constrained. The GSD stands securely on the rear end - balancing on the rear tire and rear rack. By folding down the handlebar/stem and removing seat post, the overall size of the bike is that of one 6' tall human standing upright - your new useful friend ready to ride whenever you are.

  • Crazy patented adjustable stem thing. Tern loves gadgets and cool parts. Thankfully, they also care about safety. Their super-strong, super-adjustable quick release stem allows you to customize the fit of this bike on the fly, or easily share it with another rider of a different size.

  • Awesome awesome 4 piston brakes. Electric family and cargo bikes, designed for massive loads, aren't always spec'd with brakes that work great on steep downhills and wet conditions. Not so with the GSD - Magura MT5 4-piston hydraulic disc brakes are some of the best made for extreme use.

  • One more thing! Comes in one color. Mango!


Tern warranties their frames for 5 years against defects in material and/or workmanship. Warranty is non-transferrable. Bicycle components (excluding tires, chain, cables, etc.) generally have a 1 year limited warranty. Bosch electric components carry a 2 year warranty.


FRAME Aluminum
FORK Tern Tarsus Aluminum
SIZE One size fits all
MOTOR Bosch CX Drive
BATTERY PowerPack 500Wh
CONSOLE Bosch Purion
RANGE 50 mi (up to 120mi)
RIMS Tern Atlas-36mm
TIRE Schwalbe Super Moto X
FRONT HUB Thru Axle Disc
SPOKES 13g Stainless
SEAT Tern Porter+
SEAT POST Tern Telescoping
BRAKE Magura MT-5
TRANSMISSION Enviolo IGH (360% Gear Range)
SHIFTER Enviolo Twist Shifter
STEM Tern Andros
FRONT LIGHT Tern Valo Direct
REAR LIGHT Herrmans H-Trace
FENDER Splashguard
REAR RACK Included
KICKSTAND............ Pletscher Style

Product details and specs are subject to change, errors and omissions.