Mighty but mini, the Tern HSD S11 electric bike gives you all the smooth power of a Bosch motor for easy pedaling in a convenient size for commuting in the city and running errands.
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- Bosch PowerPack 545 battery provides long range of up to 76 miles (121 km)
- Class 3 Bosch Performance Line Sport motor with Bosch Smart System provides up to 75 Nm of torque and increases your pedaling power by up to 340%
- Bosch ConnectModule allows you to utlize Smart System enhanced theft-protection functions like eBike Alarm and eBikeTracking
- Control all Smart System functions at your fingertips via the Bosch eBike Flow App
- App allows you to keep your e-bike system up-to-date with over-the-air updates, activate the eBike Lock, customize riding modes, view bike info, connect to dealers and more
- Kiox 300 color display that automatically activates eBike Lock when removed from the bike
- Cargo and passenger-ready with a large rear rack capacity of 176 lbs. (80 kg)
- Fits riders from 4 ft. 11 in. up to 6 ft. 5 in. (150–195 cm) with an easily adjustable cockpit
- Tested for safety and reliability; frame and fork are EFBE-tested up to the 180 kg (397 lbs.) maximum gross vehicle weight
- 1 x 11-speed Shimano Deore groupset
- Ultrabright Ignis headlight with high/low beam ensures 24/7 visibility, no matter the weather
- Always-on RearStop brake light helps you safely signal stops
- 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 3: pedal assist up to 28 mph |
| Motor | Bosch Performance Line Sport |
| Motor Type | Mid-Drive |
| Motor Torque (Nm) | 75 Newton meters |
| Battery Type | Lithium Ion |
| Battery Capacity (Wh) | 545 watt hours |
| Battery Removable | Yes |
| Charge Time (hrs) | 2-6 hours |
| Pedal Assist Range | 32-76 miles |
| Frame | 6061-AL, patented design, Tern sliding dropouts, EFBE Tri-Test approved: 180 kg |
| Step-Through | Yes |
| Bike Suspension | Front Suspension |
| Fork | Suntour custom for Tern, 1.5 in. tapered chromoly steerer, 32 mm stanchions, thru axle, EFBE approved: 180 kg |
| Fork Travel | 70 millimeters |
| Crankset | Tern HSD custom |
| Bottom Bracket | Motor integrated |
| Shifters | Shimano Deore |
| Rear Derailleur | Shimano Deore Shadow+ |
| Rear Cogs | 11-36T, 11 speed |
| Number of Gears | 11 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Magura MT4, hydraulic disc, 180 mm rotor (front), 160 mm rotor (rear) |
| Brake Levers | Magura MT4 e-stop, hydraulic, with brake light sensor |
| Rims | Tern Atlas H, 35 mm wide |
| Rear Hub | Novatec, sealed cartridge bearing, disc |
| Wheel Size | 20 inches |
| Tires | 55-406, RaceGuard puncture protection, ECE-R75 e-bike certification |
| Tire Width | 55 millimeters |
| Handlebar Shape | Moustache Bar |
| Handlebar | 6061-AL, Tern Andros adapted |
| Stem | Tern Andros, adjustable, forged construction, patented technology |
| Seat Post | Cane Creek Thudbuster G4, Tern Telescope, 34.9/30.9 mm |
| Saddle | Tern Upright by Velo |
| Pedals | Urban with nonslip surface, sealed bearings |
| Headset | Tern Flux Pro Taper by FSA, 1.5 in., angular contact bearings, Physis integrated |
| Chain | KMC 11-speed for e-bikes; EPT corrosion-resistant coating |
| Weight | 61 lbs. 14.4 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.