Mighty But Mini

What makes it an S11?

  • Bosch Performance Line motor with Bosch Smart System provides up to 75 Nm of torque and increases your pedaling power by up to 340%
  • Bosch ConnectModule—for the Smart System’s enhanced theft-protection functions like eBike Alarm and eBikeTracking
  • Kiox 300 color display that automatically activates eBike Lock when removed from the bike
  • 1x11-speed Shimano Deore groupset
  • Ultra-bright Ignis Headlight with high/low beam ensures 24/7 visibility, no matter the weather
  • Always-on RearStop Brake Light helps you safely signal stops

HSD Highlights

  • Control all Smart System functions at your fingertips via the Bosch eBike Flow App: keep your e-bike system up-to-date with over-the-air updates, activate the eBike Lock, customize riding modes, view bike information, connect to dealers, and more! 
  • Bosch PowerPack 545 battery provides long range of up to 121 km (76 mi) 
  • Cargo and passenger-ready: large rear rack capacity of 80 kg (176 lb) means you can carry one infant to a medium-sized adult passenger, or lots of cargo
  • Fits riders 150 - 195 cm (4’11” - 6’5”) with an easily-adjustable cockpit
  • Tested for safety and reliability: frame and fork are EFBE-tested up to the 180 kg (397 lb) Maximum Gross Vehicle Weight
HSD S11 gen2 Red
  • 20" wheels

Product Reviews

Our pick for the best city bike of 2022 looks a lot like the dense urban areas it was built to thrive in: There’s no wasted space. The Tern HSD S11 is a compact electric city and commuter bike designed with functionality and utility in mind.

Electric Bike Report

The amount of thought Tern has put into their bikes really is astounding and it’s hard to look at the HSD and not wonder how they managed to fit so much utility, so much practicality into such a small e-bike.

Electric Bike Report


General Info
1 x 11
28.1 kg (61.9 lb)
Gear Inches:
32" - 104" (2.54 - 8.32 m)
Folding Size:
165 × 39.5 × 87 cm (65 × 15.6 × 34.3 in)
Folding Time:
5 seconds
Frame Sizes:
One size
Distance: Seatpost to Handlebar:
52 - 62.5 cm (20.5 - 24.6 in)
Distance: Saddle to Pedal:
76 - 110 cm (29.9 - 43.3 in)
Suggested Rider Height:
150 - 195 cm (59.1 - 76.8 in)
Max Gross Vehicle Weight:
180 kg (396.8 lb)
Max Rider Weight:
120 kg (264.6 lb)
Tern HSD, 6061-AL, patented design, Tern sliding dropouts, EFBE Tri-Test approved: 180 kg
Suntour custom for Tern, 1.5" tapered Chromoly steerer, 32 mm stanchions, Thru-axle, 70 mm travel, EFBE approved: 180 kg
Tern Physis 3D, 3D forged, 5 patented technologies, 12°, 290 mm
Tern Andros, adjustable, forged construction, patented technology
Tern Flux Pro Taper by FSA, 1.5", angular contact bearings, Physis integrated
Tern Sweep, 6061-AL, Tern Andros adapted
Grips/Bar Tape:
Tern Upright by Velo
Cane Creek Thudbuster G4, Tern Telescope, 34.9/30.9 mm
Seatpost Clamp:
Tern Collar
Front Brake:
Magura MT4, hydraulic disc, 180 mm rotor
Rear Brake:
Magura MT4, hydraulic disc, 160 mm rotor
Brake Levers:
Magura MT4 e-stop, hydraulic, with brake light sensor
Brake Cable & Housing:
Magura, hydraulic
Front Wheel:
Tern Atlas H, cargo wheel
Rear Wheel:
Tern Atlas H, cargo wheel
Front Hub:
Novatec, Thru-axle, sealed bearings
Rear Hub:
Novatec, sealed cartridge bearing, disc
Spokes and Nipples:
Stainless steel, double-butted
Tern Atlas H, wide 35 mm
Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification
Shimano Deore, 1 x 11 spd
Rear Derailleur:
Shimano Deore Shadow+
Tern HSD custom
11-36T, 11 spd
Bottom Bracket:
Motor integrated
KMC 11 spd, for eBike, EPT corrosion resistant coating
Urban with non-slip surface, sealed bearings
Shifter Cable & Housing:
Jagwire LEX-SL, slick treatment, alloy ferrules
Bosch Performance Sport, 340% Assist, 75 Nm Torque, max speed 28 mph (US)
Bosch PowerPack 545
Bosch Kiox 300 w/ LED remote, 4 mode selectable, walk assist, connectivity with Bosch eBike Flow app, electronic bike lock
Lock & Alarm:
Bosch Connect Module, GPS/GSM connectivity; 1 year free cell connectivity, Anti-theft alarm
545 Wh: 51-121 km (32-76 mi)
100-240V, 4A (US)
Bells & Whistles
Pitch Plus, brass
Custom Bash Guard
Ursus, rear mount
Luggage Socket:
Combo Mount
Front Light:
Ignis Headlight, Ultra wide 700 lumens, Hi/Lo Beam
Rear Light:
RearStop Brake Light, Always on
SKS, stainless hardware
Atlas H rack, Atlas Rack Mount, 6 point mounting, 80 kg capacity
Frame Lock:
ABUS, keyed-alike with Bosch battery

*Note: These are our standard model specifications. The bike's weight and folded dimension may not include racks and fenders. The specifications for your country may differ slightly. We do our best to ensure that the specifications listed here accurately reflect the exact parts found on our production bikes. However, component changes do occur for various reasons and there may be brief delays on site updates. We reserve the right to make component changes without prior notification, which may cause discrepancies with the information listed on the web.