Tern HSD S8i Active Plus 2023 - Electric Folding Bike
Enormously Useful. Surprisingly Smaller.
The Tern HSD S8i Active plus compact electric cargo bike is mighty but mini: It's easy to handle, easy to share, extremely comfortable to ride, carries a whole lot of cargo—and all of this in a compact design that's shorter than a standard bicycle.
Key features:
- Tern HSD, 6061-AL frame
- Suntour custom for Tern forks with 70mm of travel to smooth out the road
- Shimano Nexus 8-speed hub gives maintenance free shifting
- Magura brakes offer all-weather stopping power
- Schwalbe Big Ben tyres given plenty of traction in most conditions
- Sizes: One Size
- Colours: Matt Black
- The Tern HSD S8i Active Plus is available with 0% APR finance
Drive Information:
- Motor: Bosch Active Line Plus (Gen 3), max speed 25 kph (EU)
- Battery: Bosch PowerPack 400
- User Interface: Bosch Purion, 4 mode selectable, walk assist
Easy to Handle
Whether you're riding, storing, or moving it around, the HSD is a breeze to handle. It's shorter than a regular bike and its weight is the same as a regular ebike.
Kiddie Carry
Bring the kiddo. The HSD's extra-long Atlas H Rack gives plenty of heel clearance and room for your kiddo to enjoy the view rather than being smushed up against your back. The rack is rated to 60 kg (132 lb), so when paired with the right Passenger System accessories, the HSD is ready for your growing family.
Flat Fold
Fifteen seconds and the HSD transforms into a flat package that's perfect for fitting into SUVs, station wagons, or bus storage compartments.
Ready to Haul
Despite its diminutive stature, the HSD is a mid-sized cargo bike with some serious hauling capacity. With a maximum gross vehicle weight of 170 kg (374 lb) and an XL-sized Atlas H Rack, it'll carry a week's worth of groceries or camping equipment for the weekend. It even has a dedicated trailer mount, so adding extra cargo is a cinch.
Vertical Parking
The HSD flips up for convenient vertical parking. Take it upstairs in an elevator and park it inside at home or at work—it needs just a wee bit of floor space.
A Comfier Ride
With a longer wheelbase and extra-low center of gravity, the HSD is smoother and more stable than your standard ebike. Easy-Step frame design paired with an adjustable stem and seatpost offers a comfortable upright riding position for both taller and shorter riders. Add a suspension fork and balloon tires and even the meanest cobblestone roads are comfortably navigated.
All Tredz bikes are:
- Fully built & ready to ride
- Fully checked & tested by Cytech qualified mechanics
- Available with 0% APR finance on any basket over £99
- UK price match promise
- 365 day no hassle returns
- Free delivery in the UK Mainland on a date that suits you
In the box with every Tredz bike is:
- Free Tredz 9 key trail tool
- Free Tredz pedal spanner
- Free basic pedals
- Tredz drawstring kit bag
- 16 point quality control check sheet
- Basic bike setup instructions
- Free Cycle Plan insurance voucher
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Tern HSD, 6061-AL, patented design, Tern sliding dropouts |
| Fork | Suntour custom for Tern, 1.5" tapered Chromoly steerer, 32 mm stanchions, Thru-axle, 70 mm travel |
| Headset | Tern Flux Pro Taper, 1.5", angular contact bearings, Physis integrated |
| Stem | Tern Andros (G2), adjustable, forged construction, patented technology |
| Bars | Tern Sweep, 6061-AL, Tern Andros adapted |
| Front Brake | Magura® MT4 hydraulic disc brakes |
| Rear Brake | Magura® MT4 hydraulic disc brakes |
| Brake Lever | Magura, hydraulic |
| Shifters | Shimano Nexus 8 |
| Speed | 8 |
| Rims | Tern Atlas H, wide 35 mm |
| Front Hub | Novatec, Thru-axle, sealed bearings |
| Rear Hub | SHIMANO Nexus 8 |
| Spokes | Stainless steel |
| Front Tyre | Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification |
| Rear Tyre | Schwalbe Big Ben, 55-406, RaceGuard puncture protection, ECE-R75 ebike certification |
| Seat Post | Tern Telescope, 34.9/30.9 mm, 2014-AL |
| Saddle | Tern HSD |
| Chainset | Tern HSD custom, Gates CDX CNC machined beltring |
| Bottom Bracket | Motor integrated |
| Chain | Gates Carbon Drive CDX belt |
| Cassette | Gates CDX, precision CNC machined cog |
| Pedals | Urban with non-slip surface |
| Weight | 170 kg (374 lbs) |
| Battery Size (WH) | Bosch PowerPack 400 |
| Motor | Bosch Active Line Plus (Gen 3), max speed 25 kph (EU) |
| User Interface | Bosch Purion, 4 mode selectable, walk assist |
Electric Bike Bike Size Chart
|
Height |
e Bike Size |
e Road Bike Size |
e Mountain Bike Size* |
|
4’8” – 5’1” 143 – 155 cm |
XXS |
44 cm |
13” (33 cm) |
|
5’1” – 5’4” 155 – 163 cm |
XS |
48 cm |
15” (38 cm) |
|
5’4” – 5’7” 163 – 170 cm |
S |
51 cm |
16” (41 cm) |
|
5’7” – 5’10” 170 – 178 cm |
M |
54 cm |
18” (46cm) |
|
5’10” – 6’0” 178 – 183 cm |
L |
56 cm |
19” (48cm) |
|
6’0” – 6’3” 183 – 191 cm |
XL |
58 cm |
20” (51 cm) |
|
6’3” – 6’5” 191 – 196 cm |
XXL |
60 cm |
21” (53 cm) |
|
6’5” – 6’9” 196 – 205 cm |
XXXL |
62 cm |
22” (56 cm) |
* Mountain bikes are sized differently to road bikes. Typically, they are sized in inches as the first MTBs were produced in the USA. European brands like Lapierre and Haibike like to use centimeters for all their bikes. The measurements of their mountain bikes doesn’t match their road bikes but is like a simple conversion from the inches measurement. This is why we have included cm measurements in brackets for the e mountain bike column.
See our bike size guide for more on bike sizing
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