Price
Motor (Nominal)
Range
Battery
Technical Architecture
Overview
Price
$2,000
MSRP
Motor
750 W
Nominal Output
Battery
504 Wh
Battery Capacity
Speed
28 mph
Unlocked Top Speed
Payload
300 lbs
Max Load Capacity · bike weighs 60 lbs
Safety Standards
UL 2849 Certified
Electrical System Integrity
UL 2271 Certified
Battery Performance & Safety
Foldable
No
Frame style(s): High-Step
Score breakdown
47 out of 100 — Worth considering
Data notice. MISSING DATA: Battery & Range / Battery ingress protection
The arithmetic, in full
Power & Drive10.5 / 16
Battery & Range4 / 21
Safety & Braking7.5 / 14
Ride Quality & Components15 / 32
Utility & Practicality6 / 8
Display & Connectivity4 / 9
Performance score47 / 100
Value — 47 points ÷ $2,00023.5 pts per $1,000
Show every metric and rung — how each subtotal was earned
Every metric below is a ladder. The bike sits on one rung, and that rung’s points are the points it earns. Add the six category subtotals and you get the score at the top of the page. There is no weighting step, no normalisation and nothing rounded away.
Adding a bike never moves another bike’s score. The score is absolute, not a curve. A bike that earned 62 in January earns 62 in December unless its specification changes or we correct a data error — and we log every correction.
Power & Drive
Peak power output4 / 9.5
This bike: 960 W — 900–1,049 W
Under 600 W0 pts600–749 W1.5 pts750–899 W2.5 pts900–1,049 W4 ptsThis bike1,050–1,199 W5.5 pts1,200–1,349 W7 pts1,350–1,499 W8 pts1,500 W or more9.5 pts
System voltage x controller amperage - the one number that decides acceleration and hill climbing. Scored once, not three times.
Pedal-assist sensing3.5 / 3.5
This bike: Torque — Torque sensor
Cadence sensor only0 ptsTorque sensor3.5 ptsThis bike
A torque sensor measures how hard you pedal and matches it. Every bike has at least a cadence sensor, so cadence alone earns nothing.
Throttle1 / 1
This bike: Yes — Throttle included
No throttle0 ptsThrottle included1 ptThis bike
Lets you pull away from a stop without pedalling - useful with a load, on a hill, in traffic, or with joint pain.
Speed class2 / 2
This bike: 28 mph — 28 mph (Class 3)
Below 20 mph0 pts20–27 mph (Class 1/2)0.5 pts28 mph (Class 3)2 ptsThis bike
Class 3 bikes (28 mph) keep pace with city traffic. Class 1 and 2 stop assisting at 20 mph.
Battery & Range
Usable battery capacity4 / 12
This bike: 504 Wh — 500–649 Wh
Under 350 Wh0 pts350–499 Wh2 pts500–649 Wh4 ptsThis bike650–799 Wh6 pts800–999 Wh8 pts1,000–1,299 Wh10 pts1,300 Wh or more12 pts
Total watt-hours you can carry, counting a second battery if one is included. Capacity is scored once whether it arrives in one pack or two.
Charger speed0 / 3
This bike: 96 W charger — Under 100 W
Under 100 W0 ptsThis bike100–149 W0.5 pts150–199 W1 pt200–249 W2 pts250–349 W2.5 pts350 W or more3 pts
The charger's own output in watts. Scored on the charger alone so that a large battery is not penalised, and so a 36 V high-amp charger cannot pass for a 48 V one.
Cell supplier0 / 2
This bike: China Tier 1 — Not LG, Samsung or Panasonic
Not LG, Samsung or Panasonic0 ptsThis bikeLG, Samsung or Panasonic2 pts
Cells from LG, Samsung or Panasonic publish cycle-life and thermal data. Anything else earns nothing.
Battery ingress protection0 / 4
This bike: not published by the manufacturer
The manufacturer does not publish this specification, so the bike scores zero here. We do not guess, and we do not quietly skip the metric — that would let an unpublished spec look like a strong one.
The published IP rating of the battery pack - not the bike. IPX5 is a water-jet test only; IP65 adds a dust-tight claim; IPX7 adds immersion.
Safety & Braking
Braking system3 / 6.5
This bike: Hydro 2p — Hydraulic disc, 2-piston
Rim, V-brake, coaster or mechanical disc0 ptsHydraulic disc, 2-piston3 ptsThis bikeHydraulic disc, 4-piston6.5 pts
Mechanical disc is the bare minimum and earns nothing. Hydraulic discs stop harder with less hand effort; a four-piston calliper is more than twice the braking power of a two-piston and over double the price.
Brake hardware1 / 2.5
This bike: Tektro — Tier-2 name brand (Tektro, Star Union)
Unbranded or not published0 ptsTier-2 name brand (Tektro, Star Union)1 ptThis bikePremium (Magura, Shimano, SRAM, TRP, Hayes)2.5 pts
Whether pads, rotors and callipers can be bought and serviced anywhere. Tektro and Star Union are both serviceable; Magura is better.
Motor cut-off at the brake lever2 / 2
This bike: Yes — Motor cut-off at the brake lever
Throttle fitted, no cut-off at the lever0 ptsMotor cut-off at the brake lever2 ptsThis bikeNo throttle fitted - the failure mode does not apply2 pts
On a throttle bike, squeezing the brake should cut motor power. It is a backstop for a stuck throttle or a controller fault. A bike with no throttle cannot have that failure, so it scores full marks here.
Brake-activated light1.5 / 1.5
This bike: Yes — Brake-activated rear light
No brake light0 ptsBrake-activated rear light1.5 ptsThis bike
A rear light that brightens under braking is the cheapest way to be seen slowing down.
Turn signals0 / 1.5
This bike: No — No turn signals
No turn signals0 ptsThis bikeIntegrated turn signals1.5 pts
Signal without taking a hand off the bars.
Ride Quality & Components
Suspension2.5 / 11
This bike: OEM — Unbranded suspension fork
Rigid steel fork0 ptsRigid aluminium or carbon fork0.5 ptsUnbranded suspension fork2.5 ptsThis bikeName-brand suspension fork (SR Suntour, RST, KKE)6.5 ptsPremium suspension fork (Fox, RockShox, Marzocchi)9 ptsPremium fork plus rear suspension11 pts
A rigid steel fork costs about $6 to make; a name-brand suspension fork is $80 or more. The spread reflects that.
Drivetrain4 / 10.5
This bike: Single / Gate Belt — Single-speed belt drive
Single-speed chain0 pts3–7 speed, entry tier2 ptsSingle-speed belt drive4 ptsThis bike7–8 speed, mid tier4 pts9+ speed, quality tier7 ptsInternally-geared hub or gearbox with belt10.5 pts
Gear range, shifting quality and maintenance burden on one ladder. An internally-geared hub with a belt is several levels above a single-speed chain and costs roughly eighty times as much.
Tyres1.5 / 1.5
This bike: Kenda — Premium brand (Maxxis, Schwalbe, Kenda, Continental)
Unbranded or OEM0 ptsValue brand (CST, Chaoyang, Innova)1 ptPremium brand (Maxxis, Schwalbe, Kenda, Continental)1.5 ptsThis bike
The best available proxy for grip, rolling resistance and puncture resistance. Deliberately kept small - a name-brand tyre is only about $5 more.
Frame finish1.5 / 2
This bike: Smooth — Smooth welds
Basic welds0 ptsSmooth welds1.5 ptsThis bikeGravity-cast or hydroformed2 pts
Weld finish is a visible proxy for frame manufacturing control.
Axle standard2 / 2.5
This bike: Yes — Thru-axle
Bolt-on or nutted axle0 ptsQuick-release axle0.5 ptsThru-axle2 ptsThis bikeThreaded thru-axle2.5 pts
A thru-axle holds the wheel more securely than a quick-release; a threaded thru-axle more securely still.
Stem1.5 / 2
This bike: Adjustable — Tooled adjustable stem
Non-adjustable stem0 ptsTooled adjustable stem1.5 ptsThis bikeQuick-release adjustable stem2 pts
An adjustable stem lets one bike fit several riders. A quick-release adjustable stem costs roughly triple a tooled one.
Pedals1.5 / 2
This bike: Aluminum — Aluminium
Plastic0 ptsSteel0.5 ptsAluminium1.5 ptsThis bikeQuick-release aluminium2 pts
The part most owners replace first. Quick-release aluminium pedals fold the bike into a smaller space and do not snap.
Lock-on grips0.5 / 0.5
This bike: Yes — Lock-on grips
Standard grips0 ptsLock-on grips0.5 ptsThis bike
Lock-on grips do not twist loose or slide off in the wet.
Utility & Practicality
Rack & cargo system2.5 / 4
This bike: Yes / Aluminum — Aluminium rack
No rack included0 ptsSteel rack1.5 ptsAluminium rack2.5 ptsThis bikeAluminium rack with standard accessory interface (MIK/AVS)4 pts
Whether the bike carries anything out of the box, and whether accessories clip to a published standard instead of needing bungee cords.
Fenders & weather protection2 / 2.5
This bike: Yes / Aluminum — Metal fenders
No fenders0 ptsBasic plastic fenders0.5 ptsMetal fenders2 ptsThis bikeFull-coverage composite fenders2.5 pts
Full-coverage fenders are what make an e-bike usable in the rain. Composite fenders do not rattle, rust or cut.
Kickstand1.5 / 1.5
This bike: Adjustable — Adjustable or double-leg kickstand
No kickstand0 ptsFixed kickstand1 ptAdjustable or double-leg kickstand1.5 ptsThis bike
An adjustable or double-leg stand holds a loaded bike upright.
Display & Connectivity
Display2.5 / 6.5
This bike: Color LCD — Colour LCD or OLED
LED indicator only0 ptsMonochrome LCD1.5 ptsColour LCD or OLED2.5 ptsThis bikeTFT4.5 ptsTouchscreen TFT6.5 pts
How much you can read at a glance, in sunlight, without stopping. A touchscreen TFT is $40-50 of cost over a colour LCD.
Rider tuning1.5 / 2
This bike: Somewhat — Partial tuning
No rider tuning0 ptsPartial tuning1.5 ptsThis bikeFull rider tuning2 pts
Whether you can change how the bike delivers power, or only how much.
App connectivity0 / 0.5
This bike: No — No app
No app0 ptsThis bikeApp connectivity0.5 pts
Useful for firmware updates and diagnostics. Nice to have, but most riders do not use it.
Features we show but do not score
0 points — useful to know, not evidence of quality—Quick-release pedals✓Lock-on grips—Tyre sealant fitted—Plastic-free packaging—Second battery included—Foldable frame
These are real, checkable facts about the bike, and buyers ask about them. None of them predicts whether the bike is good, so none of them moves the score. Quick-release pedals are convenient; they are not a quarter of a braking system.
Editorial Insights
Key Benefits & Drawbacks
Reasons to Buy
- Delivers a strong balance of performance and value for everyday riding.
- Features intuitive controls that are welcoming for first-time e-bike riders.
- Sturdy frame construction ensures long-term durability.
Reasons to Avoid
- May lack the specialized components required for extreme off-road use.
- Heavier curb weight compared to premium, lightweight analog bicycles.
Expert Verdict
In-Depth Analysis
Editorial Review: Evaluating theSolar Sparrow
Sticking with the Euphree family, the Euphree Solar Sparrow takes a sharp turn away from the heavy, high-powered "SUV" architecture of the Stellar Falcon 2 and moves directly into sleek, European-style urban minimalism. Billed as the brand's lightest, most affordable, and most approachable model yet, the Solar Sparrow is built for riders who want absolute simplicity without sacrificing premium comfort.
By tossing out a clunky traditional chain in favor of a silent Gates Carbon Belt Drive and keeping the bike exceptionally lightweight, Euphree created a virtually maintenance-free neighborhood cruiser. It glides over city streets with a clever dual-suspension layout hidden seamlessly inside a low step-through frame.
The Technical Snapshot
- Power & Zippy Performance: Driven by a snappy 500W nominal Bafang rear hub motor that peaks at a muscular 900W and 75Nm of torque. Despite its lighter weight, it punches way above its weight class on hills, delivering quick, quiet off-the-line acceleration.
- The Belt Drive Twist: Utilizes a single-speed Gates Carbon Belt Drive (60T chainring / 20T rear cog) instead of a greasy chain, greasy derailleur, or complex shifter gears. It is completely grease-free, silent, rust-proof, and rated for up to 10,000 miles of maintenance-free riding.
- Dual-Sensor Adaptability: Carries over Euphree’s signature selectable torque and cadence sensor ecosystem. You can toggle the torque sensor for an instantaneous, bionic pedaling response that extends your range, or switch to the cadence sensor for effortless "cruise-control" gliding.
- Battery & Safety Range: Houses a slim, down-tube integrated 48V 10.5Ah (504Wh) battery built with premium cells, pushing a real-world range of 22 miles in Turbo up to 56 miles in Eco mode. The full build is SGS certified to UL 2849 standards for top-tier electrical safety.
- Drivetrain & Speed: Operates as a class-switchable commuter. It runs beautifully at Class 2 speeds (20 mph max via the left thumb throttle), but can be easily unlocked via the full-color display to achieve Class 3 speeds up to 28 mph under pedal assist.
- Hidden Dual-Suspension: Retains a plush ride quality via a unique, integrated "Uni-Fork" head-tube monoshock (30mm of travel) tucked into the front fork to absorb abrupt sidewalk transitions, paired with a premium SR Suntour NCX rocker suspension seatpost and a wide, cushy Velo comfort saddle.
- Brakes & All-Weather Control: Stopped reliably by Tektro E350 hydraulic disc brakes clamped onto 180mm rotors front and back. It rolls on efficient, fast-rolling 26x2.4-inch Kenda Kwik Six tires designed to balance low friction on pavement with solid wet-weather grip.
- Sizing & Frame Aesthetics: Crafted with an ultra-accessible aluminum step-through frame boasting a low 16-inch standover height. Weighing just 60 pounds fully dressed (or 54 lbs stripped of its battery), it handles with immense agility. The one-size geometry features a 90° adjustable stem and swept-back bars, specifically optimized to fit riders from 4'11" to 5'10" (with a 300-lb total weight capacity).
- Commuter Perks: Arrives fully styled in five vivid colorways, equipped with full-coverage metal fenders, a 50-pound capacity MIK-compatible rear rack, a blinding 200-lux dual-beam LED headlight, a rear brake-sensing light, and a vibrant color display with an integrated USB-C device charging port.
Key Specifications
Solar Sparrow
Performance
- Motor (Nominal)
- 750 W
- Motor (Peak)
- --
- Battery
- 504 Wh
- Battery (Ah)
- 10.5 Ah
- Range
- 50 mi
- Top Speed
- 28 mph
Practicality
- Price
- $1,799
- Weight
- 60 lbs
- Payload Capacity
- 300 lbs
- Foldable
- No
Real-World Range Estimator
Fine-tuned for the 504 Wh Battery
25.2 mi
Motor Type
Terrain Profile
The Science of eBike Range
Estimated range is total usable battery capacity divided by adjusted energy consumption: Range (mi) = Battery (Wh) ÷ Adjusted Consumption (Wh/mi). Manufacturer range claims are measured in ideal lab conditions, so this model starts from a real-world baseline and applies a multiplier for each factor you change above.
The variables
- Baseline: 20 Wh per mile, for a 180 lb rider on flat ground using standard assist with a hub motor. Every adjustment below is a multiplier against that number.
- PAS level: assist is banded rather than linear, because a controller delivers set power steps rather than a smooth ramp. Levels 1–2 draw 30% less energy than standard, level 4 draws 30% more, and level 5 draws 60% more — the jump at the top is steep because aerodynamic drag rises with the square of speed.
- Motor type: mid-drive motors run through the gearing, so they hold a more efficient operating range under load and consume roughly 14% less energy than a hub motor over the same route. Hub motors lose more to heat when they bog down on climbs.
- Rider weight: consumption rises 5% for every full 20 lbs over the 180 lb baseline, reflecting the extra rolling resistance and the energy lost accelerating more mass back up to speed.
- Terrain: a hilly profile adds 30% over flat ground. Regenerative braking recovers very little of what a climb costs, so elevation is close to a straight energy penalty.
This estimate is independent of the Battery & Range score in the rating breakdown, which scores the published specification rather than predicting a single ride. Treat the figure as a planning guide — tyre pressure, wind, temperature and stop-start riding all move the real number.
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