Commuter
Euphree Solar Sparrow Belt
$1,699
Price
504 Wh
Battery
53 lb
Weight
Euphree Solar Sparrow Belt vs Trek FX+ 2
Two commuter e-bikes at $1,699–$2,299.99, every published spec lined up. Nothing here is estimated: a figure the manufacturer does not publish is shown as “—”.
Where they differ
- The Solar Sparrow Belt assists 8 mph faster.
- The Solar Sparrow Belt costs $601 less.
- The FX+ 2 claims 10 more miles of range.
- The Solar Sparrow Belt uses a torque + cadence sensor; the FX+ 2 uses a torque sensor.
- The Solar Sparrow Belt ships as class 3; the FX+ 2 ships as class 2.
Every spec, side by side
| Solar Sparrow Belt | FX+ 2 | |
|---|---|---|
| Headline | ||
| Price | $1,699 | $2,299.99 |
| Category | Commuter | Commuter |
| Price per Wh | $3.37 per Wh | $4.42 per Wh |
| Model year | 2026 | 2026 |
| Motor | ||
| Torque | — | 60 Nm |
| Motor power | 500 W | 500 W |
| Drive | Rear hub | Rear hub |
| Motor make | Bafang | — |
| Drive system | Bafang | — |
| Sensor | Torque + cadence | Torque |
| Battery & range | ||
| Battery | 504 Wh | 520 Wh |
| Voltage | 48V | — |
| Capacity | 10.5 Ah | — |
| Cells | LG | — |
| Removable battery | Yes | Yes |
| Range (claim) | 40 mi | 50 mi |
| Range as stated | Up to 40 miles | Up to 50 mi |
| Est. real range | 32 mi | 33 mi |
| Estimate assumes | 16 Wh per mile | 16 Wh per mile |
| Weight & capacity | ||
| Weight | 53 lb | 55.78 lb |
| Max load | 300 lb | 300 lb |
| Rack capacity | 50 lb | — |
| Class & speed | ||
| Ships as | Class 3: pedal assist to 28 mph | Class 2: throttle, assist to 20 mph |
| Unlocks to | Class 3 | — |
| Class | Class 3 | Class 2 |
| Throttle | Yes | Yes |
| Top assisted speed | 28 mph | 20 mph |
| Build | ||
| Gears | Single speed | 8-speed |
| Drivetrain | Gates Carbon belt, single speed | Shimano ESSA U2000 (11-45T) |
| Brakes | Hydraulic disc | Hydraulic disc |
| Front rotor | 180 mm | 180 mm |
| Rear rotor | 180 mm | 180 mm |
| Suspension | Hardtail (front only) | Hardtail (front only) |
| Fork travel | 30 mm | 63 mm |
| Rear travel | None | None |
| Front suspension | Yes | Yes |
| Suspension seatpost | — | 50 mm |
| Tires | 26 x 2.4 | 650 x 50mm (27.5 x 2.0) Bontrager GR0 Comp |
| Display | Colour LCD, left side | LCD display |
| Frame | 6061 aluminum | Alpha Gold Aluminum |
| Sizes | One size, 13 inch seat tube | S-XL |
| Step-through option | Yes | No |
| Included | ||
| Lights | Yes | Yes |
| Fenders | Yes | Yes |
| Rack | Yes | Yes |
| Kickstand | Yes | Yes |
| Safety | UL 2849* | UL 2849 |
| Safety certification | UL 2849: most models, confirm this one | UL 2849: full system |
| As the maker states it | "SGS certified to meet UL 2271 (battery) & UL 2849 (system)" | All e-systems that Trek currently uses have been tested to UL 2849 and EN 15194 as appropriate, and certified to UL 2849 |
| Warranty | 5 yr | — |
Specs transcribed from euphree.com on 09/21/2026 and www.trekbikes.com on 09/30/2026. Manufacturers revise specs without notice: confirm before buying.