Electra Kakau Cruiser Go! Electric Bike

Color: Matte Ember
Size: One Size
This item contains hazardous or flammable materials and is restricted to surface shipping only. Cannot be sent to the city of New York. 
Shipping restrictions apply.
$160 oversize shipping applies.

Members get an estimated $180.00 (10%) back on this item as a part of your annual .

Members get an estimated $180.00 (10%) back on this item.
To buy,  sign in as an REI Co-op Member or join now.

Ideal for getting to the beach or into town, the Electra Kakau Cruiser Go! electric bike features a comfortable, upright position and wide tires for a ride that's as smooth as the perfect wave.

Location Image of color Matte EmberLocation Image of color Matte Ember
Location Image of color Matte Ember


  • With a top-assisted speed of 20 mph and a range up to 40 miles, the Hyena pedal-assist system provides powerful support for the everyday rider looking to go faster and farther
  • 250 watt Hyena rear hub motor provides 3 levels of support and delivers 40 Nm of torque across speeds
  • A fully-integrated battery provides a lower center of gravity and balanced weight distribution for a smooth ride and a clean look
  • Ready to cruise on a full charge in 4 hours
  • Pair with the Trek Central App on your smartphone to access useful information like motor range, battery charge, turn-by-turn navigation and more
  • An ergonomic saddle with shock-absorbing elastomers provides ultimate comfort for all riders
  • Front and rear mechanical disc brakes provide powerful stopping
  • Patented Flat Foot Technology ensures an upright, relaxed and comfortable ride
  • 27.5 x 2.35 in. tires make for a stable, comfortable ride
  • Matching bell, saddle, grips, and fenders included
  • Rack compatible (not included)
  • Customize your ride with a bag or basket (not included)
  • Note: Electra recommends the removal and/or replacement of battery by an authorized mechanic
  • Specs and images are subject to change


This e-bike comes with Coast to Coast Support, which includes:
  • 1 year of free adjustments (see more below)
  • In-store bike assembly
  • Pickup in store or curbside
  • Bike experts available at 170+ bike shops
REI Co-op Members get more:
  • An additional year of free adjustments on e-bikes
  • 20% off shop services
  • Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
More about our free adjustments:
New bikes go through a normal break-in period, after which they should be readjusted. All electric bicycles sold at REI include free adjustments for the defined period (one year after purchase date for non-members, or two years for REI Co-op Members)—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation, chain lubrication and e-bike firmware updates. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

View the Electra Cruiser Product LineView all Electra Electric City Bikes

Technical Specs

Best Use

Recreational Cycling

E-Bike Classification

Class 1: pedal assist up to 20 mph


Hyena 250W

Motor Type

Geared Hub

Motor Torque (Nm)

40 Newton meters

Battery Type

Lithium Ion

Battery Capacity (Wh)

250 watt hours

Battery Removable


Charge Time (hrs)

4 hours

Pedal Assist Range

16-40 miles


6061-T6 aluminum



Bike Suspension

No Suspension


Hi-ten steel unicrown, straight/tapered leg

Fork Travel

Not Applicable


Forged alloy 170 mm, 42T chainring

Bottom Bracket

Hyena T47 with integrated torque and cadence sensor

Rear Cogs


Number of Gears

1 gear(s)

Brake Type

Mechanical Disc Brake


Radius CX-7

Brake Levers



Anodized alloy 27.5 in. x 36 h

Front Hub

Alloy low-flange with 6-bolt disc, 36h, nutted

Rear Hub

6-bolt disc, 36 h, nutted

Wheel Size

27.5 inches


Balloon, 27.5 in. x 2.35 in.

Tire Width

2.35 inches

Handlebar Shape

Moustache Bar


Electra cafe


Forged alloy 25.4 mm quill, 80 mm extension

Seat Post

Alloy straight post 27.2 x 400 mm


Ergonomic with shock-absorbing elastomers


Resin platform with nonslip rubber tread


1-1/8 in. steel threaded/semi-integrated




46 pounds

Bike Weight

Bike weight is based on median size, as sold, or the average of two median sizes.



Size Chart

One Size
Height Range5'3" - 6'1"
Seat Tube Center-Top47.8
Standover Height76.2
Head Tube Length17.0
Head Tube Angle (degrees)67.0
Seat Tube Angle (degrees)67.0

Sizing Notes

Measurements are stated in centimeters unless otherwise indicated.

How we measure bikes

  1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
  2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
  3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
  4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
  5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
  6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
  7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
  8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
  9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
  10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
  11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
  12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.

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