Which is better for a beginner?

The Billy Goat KD. It is light, has a low seat and caps at 19 MPH, so a new rider can learn in stages. The Dirt Goat 104V is too powerful and too tall for a beginner.

Can an adult ride the Billy Goat KD?

Only lightly. Its 150 lb max load and 24.5 in seat height are sized for kids 8–13. Most adults exceed the load limit and will feel cramped.

The Dirt Goat 104V is built with motorcycle-grade parts: 4-piston hydraulic brakes, Samsung 50S cells and a larger frame. The KD is a simpler kids' bike with a single disc brake and a smaller pack.

Is the Dirt Goat 104V street legal?

Not as a Class 2 or 3 e-bike. At 90 MPH and 40kW it is an off-road machine. It now comes with a VIN, which helps with registration where off-road or motorcycle rules allow.

Is the Dirt Goat 104V worth stepping up to?

Only if you ride serious off-road terrain and have the skill and gear for 40kW. For family rides or a child, the KD covers the job with far less risk and weight.

How do the batteries compare?

The KD uses a 36V 10AH pack that charges in 3–4 hours. The 104V uses a 104V 60AH Samsung 50S pack, far larger and heavier, with much longer range potential.

Goat Power Bikes Billy Goat KD vs Goat Power Bikes Dirt Goat 104V

These are not rivals in the same class. The Billy Goat KD is a 39 lb, 250W kids' e-bike for riders 8–13 up to 150 lbs, capped at 19 MPH in Power Mode. The Dirt Goat 104V is a 40kW, 1,100Nm off-road machine that tops 90 MPH, with motorcycle-grade brakes and a VIN for registration. Buy the KD for a child learning to ride; buy the 104V only for an experienced adult rider with off-road space and gear.

Choose the Billy Goat KD if you are buying for a rider aged 8–13 who needs a light, low, speed-limited bike to build confidence on.
Choose the Dirt Goat 104V if you are an experienced adult rider who wants full-size dirt-bike power, torque and brakes for serious off-road use.

Prices

Goat Power Bikes Billy Goat KD: $799.00 at Goat Power Bikes (last seen Nov 13)
Goat Power Bikes Dirt Goat 104V: $7,999.00 at Goat Power Bikes (last seen Nov 13)
Difference: the Goat Power Bikes Billy Goat KD is $7,200.00 cheaper than the Goat Power Bikes Dirt Goat 104V at the latest prices (Nov 13)

	Goat Power Bikes Billy Goat KD	Goat Power Bikes Dirt Goat 104V
Rider and load	Kids ages 8–13, 150 lb max load	Adult off-road rider, no kid sizing
Motor and power	250W motor, 19 MPH top speed in Power Mode	Up to 40kW peak, 90 MPH top speed
Torque	Not published; modest hub-drive pull	1,100Nm, about 50HP equivalent
Battery	36V 10AH, 3–4 hour charge	104V 60AH Samsung 50S cells, charges to 117.6V
Weight	39 lb net, easy to lift and transport	Far heavier; needs a ramp or two people
Brakes	Single 160mm disc	4-piston hydraulic with DOT fluid
Fit	24.5 in seat height, 52 in wheelbase	Full-size 21 in front / 18 in rear tires
Extras	LED headlight and taillight, three speed levels	5 in display with CarPlay, 3-level regen, turn signals, VIN

Spec	Goat Power Bikes Billy Goat KD	Goat Power Bikes Dirt Goat 104V
Motor power	250W	—
Battery	36V10AH	—
Battery size	11x3x4in	—
Battery weight	5LBS	—
Charging time	3-4H	—
Max speed standard	Level 1: 6MPH Level 2: 9MPH Level 3: 12MPH	—
Max speed power	Level 1: 9MPH Level 2: 13MPH Level 3: 19MPH	—
Dimensions	76x30x42in	—
Wheelbase	52in	—
Seat height	24.5in	—
Net weight	39LBS	—
Max load	150LBS	—

Spec	Goat Power Bikes Billy Goat KD	Goat Power Bikes Dirt Goat 104V
Battery capacity	—	60AH
Battery voltage	—	104V (Charges to 117.6V)
Battery cells	—	Samsung 50S cells
Peak power	—	Up to 40kW
Torque	—	1,100Nm
Top speed	—	Up to 90 MPH
Front tire	—	21-inch
Rear tire	—	18-inch
Display	—	5-inch display with CarPlay integration
Regenerative braking

Goat Power Bikes Billy Goat KD vs Goat Power Bikes Dirt Goat 104V

Prices

Goat Power Bikes Billy Goat KD vs Goat Power Bikes Dirt Goat 104V

Prices

Goat Power Bikes Dirt Goat 104V

What separates them

Price history

Prices at every store