Urtopia
Urtopia - Carbon Joy Ultra E-Bike
When the manufacturer offers free accessories or promotional bundles with this bike, we honor those offers at Brimstone Bicycles. Manufacturer eligibility and terms apply.
Pickup available at Brimstone Bicycles Shop
Usually ready in 2-4 days
Description:
Light to ride, comfy to cruise, built tough.
Light as Air, Bold by Design
The Carbon Joy Ultra electric cruiser bike is 50% lighter than aluminum while ensuring exceptional strength and durability. Its flowing ribbon-inspired chainstays evoke motion, while the seat-tube-free frame is designed to turn heads and stand out.
Effortless Comfort, Perfect Fit
Designed for all-day comfort, the step-through frame and 20-inch wheels allow effortless mounting for riders of all heights. Enjoy smooth, nimble handling with carbon fork and shock-absorbing saddle, and adjustable 0-60° handlebars for customized positioning.

Carbon Joy Ultra Technical Specs
| General Info | |
| Model | Carbon Joy Ultra E-bike |
|---|---|
| Net Weight | 42 lbs (without accessories) |
| Material | Carbon fiber (frame, fork) |
| Range | Up to 70 miles |
| *The 70-mile range was tested with a 180 lb rider in ECO mode on flat roads without throttle. | |
| Top Speed | 20 mph by default, 25 mph upon unlock |
| Total Weight Limit | 330 lbs |
| Rider Height | 4’11’’ - 6’3’’ |
| Brakes | TEKTRO hydraulic disc brake with power cut-off sensor |
| Wheels | Kenda 20’’ × 3.0’’, Thru-Axle |
| E-Bike System | |
| Class | Class 2 |
| Motor | 500W (Peak Power 750W) rear hub motor, 60Nm torque |
| Throttle | Yes (up to 20 mph) |
| Battery | 529.2Wh Samsung Li-ion, UL-2271 certified |
| Pedal Assist | 4 levels (Eco, Tour, Boost, Turbo) |
| Charger | 3.5 hrs fast charger |
| Sensors | Torque sensor |
| Lights | Front: External light, 30 Lux Rear: External tail light |
| Water Resistance | IP65 |
| Drivetrain | |
| Chainrings | 50T |
| Crankset | Aluminum alloy, 152mm |
| Cassette | 12-32T, 8 Speed |
| Chain | Shimano 8 speed |
| Rear Derailleur | Shimano 8 speed |
| Shift Lever | 8 Speed Trigger |
| Pedals | PP, 103 × 84 × 24mm |
| Cockpit | |
| Handlebar | Aluminum, extender 0–60° adjustable |
| Grips | Durable ergonomic grips, lockable |
| Comfort Saddle | 273 × 160 × 75mm |
| Seat Post | Aluminum alloy, 2-stage adjustable design Diameter: φ30.9mm (inner), φ34.9mm (outer) Adjustment range: 100mm (inner), 120mm (outer) |
Shipping
Ready to ship in 2 days.
Return Policy
Our regular policy applies, please check our return policy for more details.