Union 1

100 % of 100
Assembly Options Professionally assembled by your local dealer, or DIY the assembly - its up to you!
Financing Available Buy Now, Pay Later with Klarna. We’ve partnered with Klarna to offer flexible payment options to pay over time.
30 Day Returns Our love your ride guarantee – if you’re not 100% happy with your bike, we’re not happy either. Click here for more details
Frame Warranty Covered for at least 5 years! Check out the details to see if your bike qualifies for longer.
Hydraulic disc
Tire Size
27.5 x 2.4"
Frame material

The Class 3 Union 1 electric bike gets things done. Built on a sleek aluminum frame with internal cable routing, this eBike is powered by a Bosch Performance Line Speed motor and a powertube integrated 400Wh battery. The Bosch Purion on-board computer lets you focus on the important things with a minimalist design but the data you need at the touch of a button. A 10-speed Shimano drivetrain fine-tunes your pedaling, while Tektro hydraulic disc brakes keep your speed under control. Wide tires on 27.5-inch wheels take the sting out of rough pavement. With an integrated rack, and fenders, the Union 1 lets you cut through city traffic with ease and confidence.

  • Frame Formed 6061 T6 Oversize Aluminum Alloy Thru Axle Dropout, Disc Brake Specific, Powertube Integrated Battery
  • Rear Shock *
  • Fork Formed 6061 T6 w/ Integrated Crown, Disc Brake, Thru Axle
  • Headset Integrated, Sealed Bearing
  • Cranks FSA Forged Aluminum for Bosch System
  • Sprocket FSA Forged Spider, 42 tooth w/chainguard, steel
  • Bottom Bracket *
  • Front Derailleur *
  • Rear Derailleur Shimano Deore M610, SGS
  • Shifter Shimano Deore SL-M6000, 10 Speed
  • Cogset Shimano, 11-32 tooth, 10 Speed
  • Chain KMC x10e EPT, Ebike Specific
  • Front Hub Formula, Sealed Bearing, Thru Axle
  • Rear Hub Formula, Sealed Bearing, Thru Axle
  • Spokes Black w/Silver Nipples
  • Rims Aluminum 27.5", Black Annodized, 25mm ID, Disc Specific, 32 Hole
  • Tires 27.5" x 2.4" Schwalbe Super Moto
  • Brake Levers Tektro M735, 2 Finger Lever
  • Pedals Shoe Friendly Urban Design, Resin Body
  • Handlebar Aluminum Alloy 3D Forged
  • Grips Ergo Comfort Control
  • Stem Aluminum Alloy 3D Forged
  • Seat Custom Ergo Performance
  • Seatpost Aluminum Forged Head, 350mm
  • Detangler *
  • Extras Aluminum Structural Extrusion Fenders, with Integrated Rear Rack, Rear Mounted Kickstand
  • Tape *
  • Battery Bosch PowerTube 400
  • Charger Bosch 4A
  • Motor Bosch Performance Line Speed, 85Nm Torque, 28mph
  • Display Bosch Purion
  • Range Estimated 35mi/56km to 55mi/89km
  • Brakes Tektro M735, 4 Piston Front 180mm Rotor, 2 Piston Rear 160mm Rotor
  • Product ID 4664

* Specifications are subject to change without notice

Frame Size MD 5'7" - 5'10" LG 5'10" - 6'1" XL 6'1"-6'4" SM 5'4" -5'7"
Rider Height - - - -
Bike Stand Over Height 750.0 mm 786.0 mm 820.0 mm 728.0 mm
Bike Seat Tube Length 430.0 mm 480.0 mm 530.0 mm 380.0 mm
Bike Top Tube Length 595.0 mm 610.0 mm 625.0 mm 595.0 mm
Bike Head Tube Length 160.0 mm 170.0 mm 190.0 mm 160.0 mm
Bike Head Angle 70.0 ° 70.5 ° 70.5 ° 70.0 °
Bike Seat Angle 73.0 ° 73.0 ° 73.0 ° 73.0 °
Bike Wheel Base 1125.0 mm 1135.0 mm 1151.0 mm 1125.0 mm
Bike Chain Stay Length 470.0 mm 470.0 mm 470.0 mm 470.0 mm
Bike Fork Offset 50.0 mm 50.0 mm 50.0 mm 50.0 mm
Bike Bb Height 288.0 mm 288.0 mm 288.0 mm 288.0 mm
Bike Bb Drop 65.0 mm 65.0 mm 65.0 mm 65.0 mm
Bike Stem Length 80.0 mm 80.0 mm 80.0 mm
Bike Handlebar Width 700.0 mm 700.0 mm 700.0 mm
Bike Crank Length 170.0 mm 170.0 mm 170.0 mm
Bike Seat Post Length 350.0 mm 350.0 mm 350.0 mm
Bike Stack 612.0 mm 623.0 mm 642.0 mm 612.0 mm
Bike Reach 408.0 mm 419.0 mm 429.0 mm 408.0 mm
Bike Fork Length 440.0 mm 440.0 mm 440.0 mm 440.0 mm
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There are so many factors that determine your eBike’s range: the size of your battery, the level of motor assist you select, and how much weight you are carrying. Going uphill uses more battery than a flat trail.

To help you figure out the most accurate range estimate for your eBike, please try using Bosch’s range finder tool.

Learn More

350W Bosch Performance Line Speed motor for powerful pedal assistance.

120mm travel RockShox Judy Gold fork cushions the ride, on or off-road.

Get to your destination in record time aboard this Class 3 electric bike.


There was a time when every guitar was an acoustic and it was good. Musicians got what they needed out of their instruments, and with the right group, it even rocked a bit. But then the guitar got electrified and, just like that, everything changed. Jimi. Eddie. Slash. The world would never be the same. And now, yet again, thanks to the ebike, riding will never be the same. Because what was a world of acoustic riding is about to become a world of nothing but high-fives, smiles, and maybe a few horns \m/.

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