Commuter
Rad Power Bikes Radster Road
$1,999
Price
100 Nm
Torque
720 Wh
Battery
74.5 lb
Weight
Rad Power Bikes Radster Road vs Vvolt Centauri II
Two commuter e-bikes at $1,999–$2,399, every published spec lined up. Nothing here is estimated: a figure the manufacturer does not publish is shown as “—”.
Where they differ
- The Radster Road carries 230 Wh more battery.
- The Centauri II is 21.5 lb lighter.
- The Radster Road costs $400 less.
- The Centauri II makes 20 Nm more torque.
- The Radster Road claims 5 more miles of range.
- The Radster Road uses a torque sensor; the Centauri II uses a torque + cadence sensor.
- The Radster Road is rear hub; the Centauri II is mid-drive.
- The Radster Road is hardtail (front only); the Centauri II is rigid.
- The Radster Road has a throttle; the Centauri II has no throttle.
- The Radster Road ships as class 2–3; the Centauri II ships as class 3.
Every spec, side by side
| Radster Road | Centauri II | |
|---|---|---|
| Headline | ||
| Price | $1,999 | $2,399 |
| Category | Commuter | Commuter |
| Price per Wh | $2.78 per Wh | $4.90 per Wh |
| Model year | 2026 | 2026 |
| Motor | ||
| Torque | 100 Nm | 120 Nm |
| Motor power | 750 W | 350 W |
| Peak power | — | 650 W |
| Drive | Rear hub | Mid-drive |
| Motor make | Rad | Vvolt |
| Sensor | Torque | Torque + cadence |
| Battery & range | ||
| Battery | 720 Wh | 490 Wh |
| Voltage | 48V | — |
| Capacity | 15 Ah | 13.6 Ah |
| Removable battery | Yes | Yes |
| Range (claim) | 65 mi | 60 mi |
| Range as stated | 25-65 miles | Up to 60 miles real-world on pedal assist |
| Est. real range | 36 mi | 31 mi |
| Estimate assumes | 20 Wh per mile | 16 Wh per mile |
| Weight & capacity | ||
| Weight | 74.5 lb | 53 lb |
| Max load | 320 lb | — |
| Rack capacity | 55 lb | — |
| Class & speed | ||
| Ships as | Class 2: throttle, assist to 20 mph | Class 3: pedal assist to 28 mph |
| Unlocks to | Class 3 | Class 3 |
| Class | Class 2–3 | Class 3 |
| Throttle | Yes | No |
| Top assisted speed | 28 mph | 28 mph |
| Build | ||
| Gears | 8-speed | — |
| Drivetrain | Shimano | Gates carbon belt |
| Brakes | Hydraulic disc | Hydraulic disc |
| Front rotor | 180 mm | 180 mm |
| Rear rotor | 180 mm | 180 mm |
| Suspension | Hardtail (front only) | Rigid |
| Fork travel | 80 mm | Rigid |
| Rear travel | None | None |
| Front suspension | Yes | No |
| Suspension seatpost | No | No |
| Tires | 29 x 2.2 | — |
| Display | Rad color display | — |
| Frame | Aluminum | — |
| Sizes | Regular, Large | S/M, M/L, L/XL |
| Step-through option | No | — |
| Included | ||
| Lights | Yes | Yes |
| Fenders | Yes | — |
| Rack | Yes | — |
| Kickstand | Yes | — |
| Safety | UL 2849* | UL 2849* |
| Safety certification | UL 2849: most models, confirm this one | UL 2849: most models, confirm this one |
| As the maker states it | "UL Certified to UL 2849 and UL 2271" on individual product pages, with the lineup-wide claim hedged as "All Rad ebikes are either UL Certified or tested by ACT to comply with UL 2849" | The Alpha II is tested and certified to the rigorous UL-2849 standard |
| Warranty | 2 yr | — |
| Warranty terms | Two year limited warranty; battery 300 recharge cycles or 2 years, whichever comes first (brand policy) | — |
Specs transcribed from www.radpowerbikes.com on 2026-09-19 and vvolt.com on 2026-09-20. Manufacturers revise specs without notice: confirm before buying.