Tern Orox S12 Electric Bike
Explore new ground with the Tern Orox S12 electric bike. Outfitted with a Bosch Performance Line CX motor, the bike powers up hills and can carry lots of gear for multiday trips far from home.
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- Shimano Deore XT 1 x 12-speed groupset for fast and precise shifting
- 27.5 in. stud-compatible Vee Snowball tires take on even the toughest conditions
- Hill-attacking Bosch Performance Line CX motor provides up to 85 Nm of torque and 340% support
- 725 Wh battery provides a range of 52 to 91 miles
- Dual-battery system draws from up to 2 batteries for ultralong range (second battery not included)
- Bosch Smart System with ConnectModule lets you access and control advanced functions like eBike Alarm and eBike Tracking
- Splash- and dustproof Kiox 300 color display with LED remote for intuitive control
- Powerful and responsive Magura 4-piston hydraulic brakes
- EFBE-certified safe and reliable for massive hauls, with a Max Gross Vehicle Weight of 210 kg (462 lbs.) on pavement and 180 kg (397 lbs.) off-road
- 2 frame sizes to fit riders 5 ft. 1 in. to 6 ft. 5 in. (155–195 cm) tall, and weighing up to 286 lbs. (130 kg)
- Weight: 73 lbs. 3.2 oz. without battery
- 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 | Bike Touring Backpacking |
|---|---|
| E-Bike Classification | Class 1: pedal assist up to 20 mph |
| Motor | Bosch Performance CX, max speed 20 mph (US) |
| Motor Type | Mid-Drive |
| Motor Torque (Nm) | 85 Newton meters |
| Battery Type | Lithium Ion |
| Battery Capacity (Wh) | 725 watt hours |
| Battery Removable | Yes |
| Charge Time (hrs) | 2.3-6 hours |
| Pedal Assist Range | 52-91 miles |
| Mountain Bike Style | Fat-tire |
| Frame | Tern Orox, 6061-AL, patented design, EFBE tested and approved |
| Step-Through | No |
| Bike Suspension | No Suspension |
| Fork | Atlas X, butted chromoly steel, EFBE tested and approved |
| Crankset | Tern Orox custom |
| Bottom Bracket | Motor Integrated |
| Shifters | Shimano Deore, 1 x 12-speed |
| Rear Derailleur | Shimano Deore XT Shadow+ |
| Rear Cogs | Shimano 10-51T, 12-speed |
| Number of Gears | 12 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Magura MT5, 4-piston hydraulic disc, 203 mm rotor |
| Brake Levers | Magura MT5, hydraulic |
| Rims | Tern Atlas X, custom doublewall construction |
| Front Hub | Tern Atlas X, CNC body, disc cooling fins, Boost thru axle, integrated Tern Tool with 5 mm hex/T20 Torx |
| Rear Hub | Tern Atlas X, CNC body, disc cooling fins, Boost thru axle, Syntace X-12 standard |
| Wheel Size | 27.5 inches |
| Tires | Vee Snow Ball, 27.5 x 4 in. |
| Tire Width | 4 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | Level Nine, AL-7050, 800 mm, riser, eMTB approved |
| Stem | Level Nine, 45 mm (M), 65 mm (L), Syntace VR-3 certified |
| Seat Post | Syntace P6 AL7050, 34.9 mm, Syntace VR-3 SP-approved |
| Saddle | Ergon SM, E-Mountain Sport, chromoly rail |
| Pedals | MTB, nonslip |
| Headset | FSA, 1.5 in., angular-contact bearings |
| Chain | KMC 12-speed, for e-bike, EPT corrosion-resistant coating |
| Weight | Bike without battery: 73 lbs. 3.2 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 |
| M | L | |
|---|---|---|
| Height Range | 5’1″ - 6’1″ | 5’5″ - 6’5″ |
| Reach | 610 - 660 | 670 - 730 |
| Seat Tube Center-Top | 710 - 990 | 765 - 1045 |
| Standover Height | 700 | 700 |
Sizing Notes
Measurements are stated in millimeters unless otherwise indicated.
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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Perfect for Alaska
This is a perfect bike for year round variable conditions in rough climates. The motor is powerful and quiet compared to other e-bikes I have ridden. I do not intend to use it for passengers, but am very happy with the carrying capacity and second battery/extended range potential. As a petite female I have no trouble handling this heavy and large frame. It helps to have precious experience with larger tires and a Bosch motor. To have this delivered to Fairbanks free of charge was a selling point for me- giving up color choice, tire size and model.
Not designed to transport kids
Despite what Tern's website shows, this bike is not designed to carry kids. Can you? Yes. But my experience trying to ride the Orox with two 35 lb toddlers was that it becomes highly unstable with side to side swaying due to their body motion as you pedal. After my wife and I tried multiple times, we reached out to Tern who confirmed that the frame was not designed to dampen that type of motion unlike all of their other models, and the frame designer at Tern did not agree that Tern should be marketing the Orox as a kid hauler to begin with. We returned the Orox after that conversation and ordered a GSD which could not be more different with kids onboard. The GSD is completely stable even when they flail around. That said, the Orox was amazing to ride with just fixed cargo. It was totally stable, any crack/pothole/bump was not something to be concerned about. One gripe though...the kickstand rattles non-stop. And I mean every bump results in it banging into the underside of the frame. It is nonstop noise while riding. Tern suggested zip tying a piece of rubber to make it quieter which I never honestly tried.
really with the kid hauler guy..
what spoiled **** spends $7000 on a bicycle without doing any research on it? and I wouldn't expect ANY bike to be stable with 2-35 toddlers kicking and shaking it around.. specially with a 5"7 140lb "man" riding them.. this is a great well built bike.. im touring with one now.. I have a pretty major load on mine.. and a trailer behind it.. and it does great