HSD S8i

Enormously Useful. Surprisingly Smaller.

Find a Dealer Specifications

$3,799

Bosch® Active Line Plus motor with Purion display
400 Wh battery for a range of up to 110 km (69 mi)
Custom Suntour suspension fork
Shimano® Nexus 8 internal-gear hub
Magura® MT4 hydraulic disc brakes
Gates Carbon Drive® CDX belt
Abus® keyed-alike frame lock
Fits riders from 150 to 195 cm (4’11” – 6’5”)
Fits one Thule® Yepp Maxi, Yepp Nexxt Maxi, or Bobike® GO Maxi child seat—no adapters needed

Photo may show optional accessories.

Black

Tundra

20" wheels

Electric

Top-Tier

A balanced mix of smooth riding and agility—without feeling twitchy. An upright position to see over traffic and a sensitive suspension fork for comfort make it suitable for touring as well.

aktiv Radfahren

Product Reviews

Aktiv Radfahren

I don’t want to switch to the car anymore. With a bike I am more mobile, faster and more flexible.

Fully Charged Show

These electro assist bikes might be small and nimble, but can also hold a fair amount of delivery stock and could be part of the answer to making high street shops more accessible.Read more

Cycling Electric

A cleverly specced folding electric bike that can be used for commuting, school runs or load carrying.

ElektroRad

One thing is clear: despite only four months of use, I can no longer imagine life without my Tern.

ARCD Clubmagazin

This e-bike is a cool eye-catcher and a conversation starter.

Bicycling Magazine

The HSD can handle up to 374 pounds, accepts one child seat, and works with a variety of cargo accessories for the front and rear for all your commuting and errand-running pleasure.

Welt

In return, you will receive an extremely versatile and low-maintenance bike that, thanks to its many smart transport ideas, has the right solution for almost every everyday task Read more

ElektroRad

I fly past an endless queue of cars waiting for parking spaces. My worries about getting all my shopping on my bike are in vain: The panniers are well filled, but I could have packed even more.

Elektrobike

In practical tests, the small load mule convinced with good handling and pleasant riding comfort.

eBikeTips

The HSD you’d buy just as a city workhorse, and then eventually you’d realize that it was capable of doing 90% of the journeys your car did. Read more

Specifications

General Info

Color:

Black

Tundra

Wheel Size:

20" wheels

Speeds:

1 x 8

Weight:

25.4 kg (55.9 lb)

Folding Size:

163 x 40.5 x 86 cm (64" x 15.9" x 34")

Folding Time:

5 sec

Frame Sizes:

One size

Gear Inches:

31" - 95" (2.47 - 7.56 m)

Distance: Seatpost to Handlebar:

Min: 490 mm (19.3"); Max: 590 mm (23")

Distance: Saddle to Pedal:

Min: 690 mm (27.2") Max: 1050 mm (41.3")

Suggested Rider Height:

150 - 195 cm (4'11" - 6'5")

Max Gross Vehicle Weight:

170 kg (374 lbs)

Max Rider Weight:

120 kg. (264 lbs.)

Frame

Frame:

Tern HSD, 6061-AL, patented design, Tern sliding dropouts, EFBE Tri-Test approved: 170 kg

Fork:

Suntour custom for Tern, 1.5" tapered Chromoly steerer, 32 mm stanchions, Thru-axle, 70 mm travel, EFBE tested for 170 kg

Cockpit

Handlepost:

Tern Physis 3D (G2), 3D forged, 5 patented technologies, 12°, 290 mm

Stem:

Tern Andros (G2), adjustable, forged construction, patented technology

Headset:

Tern Flux Pro Taper, 1.5", angular contact bearings, Physis integrated

Handlebar:

Tern Sweep, 6061-AL, Tern Andros adapted

Grips/Bar Tape:

Ergon

Saddle:

Tern HSD

Seatpost:

Tern Telescope, 34.9/30.9 mm, 2014-AL

Seatpost Clamp:

Tern Collar, 6061-AL, 2pc

Brakes

Front Brake:

Magura MT4, hydraulic disc, 180 mm rotor

Rear Brake:

Magura MT4, hydraulic disc, 160 mm rotor

Brake Levers:

Magura, hydraulic

Brake Cable & Housing:

Magura, hydraulic

Wheels

Front Wheel:

Tern Atlas H, cargo wheel

Rear Wheel:

Tern Atlas H, cargo wheel

Front Hub:

Novatec, Thru-axle, sealed bearings

Rear Hub:

Shimano Nexus 8

Spokes and Nipples:

Stainless steel

Rims:

Tern Atlas H, wide 35 mm

Tires:

Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification

Transmission

Shifter(s):

Shimano Nexus 8

Crankset:

Tern HSD custom, Gates CDX CNC machined beltring

Cassette/Freewheel:

Gates CDX, precision CNC machined cog

Bottom Bracket:

Motor integrated

Chain:

Gates Carbon Drive CDX belt

Pedals:

Urban with non-slip surface

Shifter Cable & Housing:

Shimano

E-System

Motor:

Bosch Active Line Plus (Gen 3), max speed 25 kph (EU); max speed 20 mph (US)

Battery:

Bosch PowerPack 400

Display:

Bosch Purion, 4 mode selectable, walk assist

Range:

42 -110 km (26-69 mi)

Charger:

Bosch Standard Charger

Bells & Whistles

Bell:

Aluminum

Chainguard:

Gates integrated

Kickstand:

Ursus, rear mount

Luggage Socket:

Combo Mount

Front Light:

Tern Valo Direct, 45 lux/190 lumens

Rear Light:

Herrmans H-Trace, for eBike

Fenders:

SKS, stainless hardware

Rack(s):

Atlas H rack, Atlas Rack Mount, 6 point mounting, max load capacity 60 kg (132 lb)

Accessory:

ABUS 5650L, 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.

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