Specifications HSD S8i

 Wheel Size 20"
Speeds 1x8
Folding Size
163 x 40.5 x 86 cm (64" x 15.9" x 34")
Frame Sizes One Size
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
Front Brake
Magura MT4, hydraulic disc, 180 mm rotor
Rear Brake
Magura MT4, hydraulic disc, 160 mm rotor
Wheels
Tern Atlas H, cargo wheel
Front Hub
Novatec, Thru-axle, sealed bearings
Rear Hub
Shimano Nexus 8
Tires
Schwalbe Big Ben, 55-406, Race Guard puncture protection, ECE-R75 Ebike Certified
Shifters Shimano Nexus 8
Rack Atlas H Rack, Max Load 132lb
Bottom Bracket Motor-integrated
Chain
Gates Carbon Drive CDX Belt
Pedals
Urban with non-slip surface
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
26-69 mi
Front Light
Tern Valo Direct, 45 lux/190 lumens
Rear Light
Herrmans H-Trace, for eBike
Lock
ABUS 5650L, keyed-alike with Bosch battery

ALL ROADS ARE
O p e n

Free Triage

It does not cost anything to diagnose a problem. Estimates provided prior to service.

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E-Bike Certified

Our head mechanic is Bosch and Shimano Steps certified. 

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Shimano Di2 or SRAM AXS

We have you covered. Our years of experience get you going quickly.

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Open U.P. A Little

Browse Complete Builds

"Working Hard to Stay Small"

From the minds behind BMC and Cervelo

Andy and Gerard created Open in search of a more pure mission: Design bikes they want to ride, build them with high quality materials in small batches, and sell them to other people looking for a great bike, great rides, and great service. 

Testimonials

★★★★★

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Los Angeles, CA

“What is truly amazing is the attention Open paid to making it work exceptionally well in every configuration. The U.P. doesn’t just accept different [wheel/tire] standards - each feels native.

Peloton Magazine

“The Open U.P. will change where you ride. A long-term review of this gravel/’cross/road bike proves that it really is as versatile as it promises. It feels natural on pavement and somehow still takes to the dirt like it was designed for it—a blend I’ve yet to experience with other bikes.”

Bicycling Magazine

“I really shouldn’t start my review with this, but I’m going to. The Open UPPER has become my all-time favorite bike. Period. End of story. If you buy one, you’ll love it.”

FeedTheHabit

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Tire
C l e a r a n c e

The Open U.P. is designed to use road, road plus, and even mountain wheels with uniform handling. 

- 2.1" wide tires on mountain wheels
- 47mm tires on 650b wheels

The Open U.P. can be configured in a variety of ways for confident, fast, rides on all surfaces.  

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