Euphree Cosmic Jay
The Euphree Cosmic Jay is an electric bike with a 48V, 15Ah pack, a 750W Bafang Geared Hub motor, a stated top speed of 28 mph (Class 3), a stated range of up to 65 miles, 720Wh of energy, a weight of 77 lbs and a load capacity of 400 lbs.
Last updated: 6 November 2026
Motor and performance
- Top speed
- 28 mph (Class 3)
- Claimed range
- Up to 65 miles
- Payload capacity
- 400 lbs
- Controller
- Custom 48V / 25A
- Throttle
- Left Thumb Throttle
- Motor specification
- 750W Bafang Geared Hub
- What the assist responds to
- Torque & Cadence
Row from the maker’s page: “Top Speed” | “28 mph (Class 3)”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Range” | “Up to 65 miles”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Total Capacity” | “400 lbs”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Controller” | “Custom 48V / 25A”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Throttle” | “Left Thumb Throttle”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Motor” | “750W Bafang Geared Hub”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Sensors” | “Torque & Cadence”
Source: euphree.com/products/cosmic-jay
Battery and charging
- Energy
- 720Wh
- Battery
- 48V, 15Ah
- Cell supplier
- LG
- Battery specification
- 48V, 15Ah (720Wh) LG Cells
- Charger
- 48V, 2 Amp
- USB port
- Type-C Port
“48V, 15Ah (720Wh) LG Cells”
Source: euphree.com/products/cosmic-jay
“48V, 15Ah (720Wh) LG Cells”
Source: euphree.com/products/cosmic-jay
“48V, 15Ah (720Wh) LG Cells”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Battery” | “48V, 15Ah (720Wh) LG Cells”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Charger” | “48V, 2 Amp”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “USB Port” | “Type-C Port”
Source: euphree.com/products/cosmic-jay
Brakes and safety
- Brakes
- Tektro E350 Hydraulic
- Brake rotors
- 203 mm Front & Rear
- Headlight
- 200 Lumens Dual Beam LED
- Taillight
- Brake Signal, 220 Deg Visibility
- Bell
- Brass Signal Bell
- Brake levers
- Adjustable w/ motor cut off
Row from the maker’s page: “Brakes” | “Tektro E350 Hydraulic”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Rotors” | “203 mm Front & Rear”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Headlight” | “200 Lumens Dual Beam LED”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Rear Light” | “Brake Signal, 220 Deg Visibility”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Bell” | “Brass Signal Bell”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Brake Levers” | “Adjustable w/ motor cut off”
Source: euphree.com/products/cosmic-jay
Frame and components
- Crankset
- 150 mm Aluminum Alloy
- Frame style
- Step-Through
- Front fork
- RST 100 mm travel, Pre load & Lockout
- Tires
- Sources disagree
CST 20 x 4"
Row from the maker’s page: “Tires” | “CST 20 x 4"”
Source: euphree.com/products/cosmic-jay
20x4"
“The wide 20x4" CST low pressure fat tires provide a stable platform with plenty of give.”
Source: euphree.com/products/cosmic-jay
- Rims
- Aluminum, Double Walled
- Spokes
- 13G Front / 12G Rear
- Chain
- KMC Z7 Stainless Steel
- Derailleur
- Shimano Altus
- Shifter
- Shimano 8 Speed Trigger Shifter
- Freewheel
- 10-32T, 8 Speed
- Pedals
- Aluminum Alloy w/ rubber grip
- Stem
- 60 mm
- Handlebar
- Aluminum Alloy, BXM Style
- Grips
- Ergonomic Locking Grips
- Saddle
- Velo Plus Comfort - Black
- Seat post
- SR Suntour NCX Suspension, 50 mm travel
- Mudguards
- Matte, Aluminum, Full Coverage
- Display
- Left-Side Color LCD
- Kickstand
- Aluminum Alloy, Adjustable Plastic Boot
- Rear rack
- Aluminum, 60 lb max
- Chainring
- 50T
- Frame material
- 6061 Aluminum Alloy
Row from the maker’s page: “Crankset” | “150 mm Aluminum Alloy”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Frame Style” | “Step-Through”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Front Fork” | “RST 100 mm travel, Pre load & Lockout”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Rims” | “Aluminum, Double Walled”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Spokes” | “13G Front / 12G Rear”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Chain” | “KMC Z7 Stainless Steel”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Derailleur” | “Shimano Altus”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Shifter” | “Shimano 8 Speed Trigger Shifter”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Freewheel” | “10-32T, 8 Speed”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Pedals” | “Aluminum Alloy w/ rubber grip”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Stem” | “60 mm”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Handlebar” | “Aluminum Alloy, BXM Style”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Grips” | “Ergonomic Locking Grips”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Saddle” | “Velo Plus Comfort - Black”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Seatpost” | “SR Suntour NCX Suspension, 50 mm travel”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Fenders” | “Matte, Aluminum, Full Coverage”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Display” | “Left-Side Color LCD”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Kickstand” | “Aluminum Alloy, Adjustable Plastic Boot”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Rear Rack” | “Aluminum, 60 lb max”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Chainring” | “50T”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Material” | “6061 Aluminum Alloy”
Source: euphree.com/products/cosmic-jay
Size and fit
- Weight
- 77 lbs
- Total length
- 68"
- Wheelbase
- 47"
- Standover height
- 18”
- Reach
- 18"
- Seat tube
- 14"
- Handlebar height
- 43"
- Saddle height range
- 30 - 37"
Row from the maker’s page: “Weight” | “77 lbs”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Total Length” | “68"”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Wheelbase” | “47"”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Standover Height” | “18””
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Rider Reach” | “18"”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Seat Tube” | “14"”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Handlebar Height” | “43"”
Source: euphree.com/products/cosmic-jay
Row from the maker’s page: “Saddle Min/Max Height” | “30 - 37"”
Source: euphree.com/products/cosmic-jay
Sources
- Cosmic Jay | Moto Style Fat Tire Electric Bike | EuphreeArchived document
Source: euphree.com/products/cosmic-jay
Retrieved October 12, 2026