The K9 4 - Open Box - Fully Loaded

Your K9 4 comes with a swing-open front door for easy access, as well as one lockable storage bench. The bench can be used for human seating, or removed entirely to maximize floor space.

You'll also receive the TechnoFlex floor mat, movable anchor bolt, and double-clip leash, so your K9 passengers stay safe and secure.

You can add more leashes, a cushy dog bed or sun shade too!

All K9 bikes also ship with two seatbelts for humans - just in case.

Click to learn more about our layout options!

Full warranty. Your bike is guaranteed to work perfectly for you. If you run into problems or defects during the one-year warranty period, we will cover both parts and service to get your bike running smoothly. Extended warranty is also available. (Read more)

Easy returns. All new U.S. Bunch Bikes come with a 14-day trial period, beginning the day after you receive your bike. We want you to be able to try out your bike life - risk free! If the bike doesn't work for you, let us know within 14 days. We'll arrange return shipping and refund 100% of what you paid. (Read more)

Exceptional service. That's forever - not just for one year. We're here to make your bike life fun, smooth and stress free! Please check out our reviews for feedback from our customers about the Bunch Bike experience.

Safety Certification: The Bunch Bike 4+ is fully UL certified to both UL 2271 and UL 2849.

Range Per Charge: 20-30 miles depending on load and terrain

Maximum Speed: 20mph

NEW Battery: UL Certified 48v 12.8Ah Li-ion - 614 Wh, LG Cells

Battery Charger: UL Certified 48v 2A Smart Charger with LED indicator

NEW Brake System: Tektro Auriga E-Twin+ E545 / E540 Hydraulic Disc Brakes with Ratcheting Parking Brake, 180mm / 2.3mm Rotors & Supersized Resevoir

Cargo Box: Marine-grade varnished plywood with lockable storage benches

Chain: KMC 27

NEW Crankset: 38T, 170mm DAPU crankset with Torque Sensor

Derailleur: 7-Speed Shimano Tourney

NEW Display: Integrated LCD display + controls with added USB charging port

Fenders: Full coverage black steel for front and rear

NEW Firmware: Bunch Bike v4 with all-new Flexible Assist Levels + PowerBoost variable throttle

Freewheel: Shimano 7-Speed

Frame: Steel - Black CNC painted, ED rust-proof internal coating

Grips: Comfort EVA foam grips

Handlebars: Alloy, Height adjustable by 8.5"

NEW Lights: Front - Spanninga Axendo 60 Lux; Rear - Spanninga Lineo - integrated in battery case

Motor: UL Certified 500W brushless, DAPU M155 Geared Hub Motor, 45 Nm of torque

Pedals: Wellgo K79 with reflectors

Rims: Samson, double wall, alloy, (36H front | 36H rear)

Saddle: Bunch comfort saddle - black

Seat Belts: Four 3-point seat belts included

Seatpost: Promax, 28.6mm x 350mm

Seatpost Clamp: Promax 319Q, quick release

NEW Shifter: Shimano Altus SL-M315 7-speed

Spokes: 12-gauge stainless steel

Steering Damper: Single gas-spring damper

NEW Torque Sensor: UL Certified Bottom Bracket Torque Sensor with sensitive, variable response

NEW Rear Rack: Included, 66-pound load limit, integrated battery rack. Lower profile accommodates wider range of rider heights

Tires: CST C-1635, Front - 20" x 2.15" | Rear - 24" x 2.00"

Throttle: Wuxing 108XL side-pull thumb throttle

Recommended Rider Height:

5'2" - 6'6" - On standard equipment

4'11" - 5'1" - Let us know so we can customize the seat

Seat Height: 29.5" - 39.5" (measured from bottom of pedal stroke)

Handlebar Height: 43" - 49"

Total Length: 83"

Width at Widest Point: 33.25"

Handlebar Width: 24"

Usable Length of Rear Rack: 14"

Rear Rack Capacity: 55 lbs.

Total Loading Capacity of Bike: 350 lbs.

Max Loading Capacity of Cargo Area: 220 lbs.

Bike Weight: 152 lbs.

Seatpost Diameter: 28.6 mm

Cargo Box Internal Width: 23"

Wood Thickness: 0.5"

Cargo Box Internal Length: 35.75"

Cargo Box Height: 18.5" at the front to 22" near the handlebars

Height of Benches from Floor: 9.25"

Depth of Benches: 9"

Height from Ground to Floor of Box: 15"

Width of Door: 18.25"

Distance between Front Wheels: 29" (center to center)

Distance from Rear Wheel to Front Wheels: 73" (back edge of rear wheel to front edge of front wheels)

Sedona and Honey are high-gloss lacquer finishes that highlight the natural woodgrain.

Cool Black and Sleek White are premium paint finishes that create a uniform semi-gloss appearance without visible woodgrain. 

Custom Design: Create a showstopping custom look and highlight your brand, your organization, or your family's unique style. Learn more about pricing and options here. We also offer a range of artist collaborations.