Tern GSD S00 Folding Electric Bike
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Looking for a bike that could replace your car? The Tern GSD S00 electric bike carries 2 kids plus groceries—or a whole lot of cargo—and with dual-battery technology, it's ready to ride all day.
Shop similar productsKey Details
- The same length as a regular bike, the GSD S00 is incredibly easy to own and use, thanks to space-saving features like FlatFold and Vertical Parking
- With FlatFold, the handlebar and stem fold down next to the frame, and the seatpost telescopes all the way down, enabling the bike to fit in larger vehicles and tight spaces
- Regular bikes take up a lot of floor space, but the GSD S00 parks vertically, so it takes up about as much space as a potted plant—perfect for city apartments and elevators
- Bosch® Cargo Line Motor provides up to 85 Nm of torque and 400% support, making it easier to tackle big hills and ride with heavy loads
- Heavy-duty, continuously variable Enviolo SP hub and Gates® CDX belt drive offer a silent, smooth ride that's virtually maintenance-free
- Adjustable cockpit comfortably fits riders 4'11" to 6'5" (150 to 195 cm)
- Super tough Atlas Lockstand™ automatically locks when engaged—just press a button on the handlebar to unlock
- Heavy-duty frame-integrated rear rack and integrated lower decks offer plenty of kid and cargo capacity—this bike handles up to a 440 lb. (200 kg) Maximum Gross Vehicle Weight
- Magura® MT5 eSTOP 4-piston hydraulic disc brakes deliver powerful and responsive braking in all conditions
- Always-on RearStop™ brake light helps you signal stops
- Integrated Abus® wheel lock is keyed-alike with the battery
- Upgraded Atlas wheels feature custom CNC-machined hubs for extra strength and durability
- Integrated Tern Valo direct head light provides 150 lumens (41 lux) to help you see and be seen
- Compatible with a wide range of cargo- and passenger-carrying accessories (not included)
- Fits up to 2 Thule® Yepp Maxi seats (not included) with no adapters needed
- NOTE: Specs and images are subject to change based on component availability
Imported.
- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- An additional year of free adjustments on e-bikes
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All electric bicycles sold at REI include free adjustments for the defined period (one year after purchase date for non-members, or two years for REI Co-op Members)—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation, chain lubrication and e-bike firmware updates. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
UL2849 certified
| Best Use | Urban Cycling |
|---|---|
| E-Bike Classification | Class 1: pedal assist up to 20 mph |
| Motor | Bosch Cargo Line Motor |
| Motor Type | Mid-Drive |
| Motor Torque (Nm) | 85 Newton meters |
| Battery Type | Lithium Ion |
| Battery Capacity (Wh) | 500 watt hours |
| Battery Removable | Yes |
| Charge Time (hrs) | 2.5-4 hours |
| Pedal Assist Range | 31-63 miles |
| Frame | 6061 aluminum |
| Step-Through | Yes |
| Bike Suspension | Front Suspension |
| Fork | Chromoly steerer; 32 mm stanchions |
| Fork Travel | 70 millimeters |
| Crankset | Tern GSD custom, Gates CDX CNC-machined beltring |
| Bottom Bracket | Motor integrated |
| Shifters | Enviolo twist |
| Rear Cogs | Gates CDX, precision CNC-machined cog |
| Internally Geared | Yes |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Magura MT5 |
| Brake Levers | MT5 E-Stop, hydraulic, with brake sensor |
| Rims | Tern Atlas, ultrawide 36 mm, dual reinforced joint |
| Front Hub | Tern Atlas, Boost thru axle, cargo-optimized design, sealed cartridge bearing |
| Rear Hub | Enviolo Sport 380 continuously variable; Boost |
| Wheel Size | 20 inches |
| Tires | Front: Schwalbe Big Ben Plus 20 x 2.15 in. (55-406); rear: Schwalbe Super Moto-X 20 x 2.4 in. (62-406); both with Green Guard puncture protection and Reflex |
| Tire Width | 2.4 inches 2.15 inches |
| Handlebar Shape | Moustache Bar |
| Handlebar | 6061 aluminum |
| Stem | Tern Andros, adjustable, forged construction, patented technology |
| Seat Post | Tern Telescope, 34.9/30.9 mm, 2014 aluminum, telescopic |
| Saddle | Tern GSD by Velo with rear handle |
| Pedals | Urban with nonslip surface, sealed bearings |
| Headset | Tern Flux Pro Taper, 1.5 in., angular contact bearings, Physis Integrated |
| Chain | Gates Cabon Drive CDX belt |
| Belt Drive | Yes |
| Weight | 77 lbs. 1.9 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Unisex |
| Sustainability | Contains recycled materials |
| One Size | |
|---|---|
| Height Range | 4'11''-6'5'' |
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
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I love this absurdly expensive bike!
OK, so this bike is very expensive. Like my wife asked me how much it cost and I changed the subject. But if you're in an urban area, it's awesome. We live in NYC and have a car, but Monday through Friday I use this bike to do basically everything (e.g. Costco, bringing my kid to daycare, commuting to work, etc.) Outside of the price, the only real con I can mention is the weight. It is heavy and the frame makes it a bit awkward to maneuver up stairs, but that it.
Wonderful long-tail cargo bike!
This bike has been so fantastic for our family. Fun to haul two kids around in and so great to use for getting groceries or neighborhood adventures. Highly recommend getting several accessories especially the front rack (perfect for tossing a bag on) and the storm shield (great for keeping kids warm and happy in all cold/wind/precipitation). The belt drive on this version is worth the upgrade -- so nice to be able to change gears at a standstill.
Deeply disappointed
I wanted to love this bike (probably because of the $6,500 price tag). However, I cannot recommend. On its second use, the seat broke off. Apparently, this has been a recurring issue with Tern GSD bikes. After 1-2 weeks, the front brake had issues and an REI shop worker said that they had to "shave off paint" to re-install the brake pads -- not a good sign. Yesterday, it started making a loud noise in the back wheel / motor area as if the motor was stuck. I had to walk it back home. I will be returning it.
a second car
Love this bike. I got it in bright orange and 1 battery. We have done so much with this bike and I purchased it over all other for the accessories, 2nd battery option, bright color, and that it fits on a standard tire tie down bike rack. This allows me to not only use it as a second car (commute, daycare drop-off, hauling kegs, groceries) but because it’s the same length as a regular bike they we are also able to travel with it and have an instant car with us.
Great bike, especially if you're short on space.
Like the previous reviewer, if my husband asks me how much this bike was, I'd change the subject! But I have nothing but positive things to say about it. It's our family's third bike (one stolen RadWagon + currently have a Spicy Curry as well) and we've loved the way they flatten Seattle's hills so much that we realized we needed two to be able to transport our whole family. Our goal was to eliminate car journeys under 10 miles and so far have been very successful. We live up a steep flight of steps and need to store the bike inside in a hallway & this bike is amazing - the Spicy Curry pretty much takes up the whole width and most of the length, the GSD's footprint is just SO MUCH SMALLER. The bike initially felt less stable than the Spicy Curry - which I have found rides pretty much like a regular bike, despite being huge BUT I was pleasantly surprised to find that loading it up with a toddler and a week's groceries actually made it feel more stable. The continuous variable shifting on this one is as close to a throttle as you can get - turn the assist up to turbo and the shifter all the way down and you are off like a shot at lights. The Bosch motor on both bikes is great, it really does seem to be MORE effective, like I go faster, when the bike is loaded more heavily... maybe it's all in my head but I was averaging 5 MPH faster WITH the kiddo and groceries up the hill than without. It doesn't corner as well as the Spicy Curry, it does feel a little more unstable, but I think that's something I'll get used to as I've only had it for 4 days so far. The kickstand is rock solid and contributes to a smaller overall footprint as well, as do the very compact built in passenger footrests - much narrower than most other bikes I've seen. The auto lock and small movement you need to engage/disengage the kickstand has already been really helpful when parking it on bike racks out and about. I also like the built in front wheel lock, but I would never rely on that in the city and do always also lock with a huge chain. As a short person (5'4") I find the cockpit is just a better fit for me too than our Spicy Curry. If I was a little taller and we had the space, another Spicy Curry would've been great (we also love that bike!) but for small spaces and small people, the GSD has been a great fit.
Great family bike!
This has been the most unbelievably useful bike! I use it mostly for taking my kids to school over very hilly terrain and some gravel. It takes it all in stride. Was very easy to set up for two kids on the back (but not cheap). I would like to upgrade to a thud buster type seat post as I do feel some bumps as the wheels are on the smaller size. I will probably purchase the second battery to expand my range.