Heybike Ranger S

What surprises us about this bike

A step-through frame, full 750 W rated motor (1400 W peak), 692 Wh battery, hydraulic-style stopping power, and a 150-lb-rated rear rack — for $1,199. The closest cross-shop is the Aventon Sinch.2 STepThru ($1,599) or the Lectric XP Lite 2.0 ($799 with weaker spec). Heybike's pricing here is aggressive even by their own standards.

The catch is that the Ranger S still uses a cadence sensor rather than the torque sensor that landed on the Mars 3.0. In practice this means power is on/off based on whether your pedals are turning, not how hard you push. For step-through bikes used for relaxed errands and short commutes — this exact use case — that's actually fine. Step-through riders typically aren't pushing hard up steep hills; they're cruising flat city streets where on/off PAS is unnoticeable. If you want a torque sensor, the Mars 3.0 is the in-brand alternative.

Power, ride, and class spec

The motor is the same 750 W rated unit Heybike puts in the Mars 3.0 — but tuned for the slightly different frame geometry and cadence sensor. Electric Bike Report's review measured the bike at "about 28 mph as advertised" with PAS engaged, and noted strong throttle pickup from a stop. Hill performance is solid for a Class 2: the bike held 18–22 mph on a 6% grade in PAS 5 in their testing — adequate for typical urban inclines, slower than the Mars 3.0's 16+ mph at 8% (which has the higher-torque setup).

The Ranger S ships as Class 2 by default — 20 mph throttle and 20 mph PAS — and unlocks to Class 3 (28 mph PAS) via the LCD display menu. There's no app required for the unlock, which some owners prefer. Class 1 (PAS only, 20 mph) is also a one-tap setting. All three modes are road-legal in 38+ US states; check local rules for bike-path restrictions on Class 3.

A 1000 W combo variant exists at $1,299 — same frame, larger 1400 W peak motor (rated up to 1000 W rather than 750 W). If you weigh 250+ lb or live somewhere hilly, the combo is worth the extra $100. For most commuters under 200 lb on flat ground, the standard 750 W is more than enough.

Range and battery

Heybike's headline range is 55 miles. Mountain Weekly News measured roughly 35 miles on a mixed urban + light-trail loop at PAS 3 with a 180 lb rider. Electric Bike Report's standardized test produced figures in the same ballpark. Plan around 30–45 miles for daily riding at typical commuter assist levels.

The pack is a 48 V / 14.4 Ah / 692 Wh removable lithium-ion with UL2849 system certification + UL2271 battery certification — the gold standard for at-rest charging in NYC, San Francisco, and most multi-unit residential buildings. Charge time is approximately 3.5 hours on the included 4 A charger (faster than the Mars 3.0's 5–6 hours because the smaller-capacity-per-cell pack accepts higher charge-rate per amp).

The battery drops out of the down tube for off-bike charging. There's only one battery slot — no dual-battery option. For long-range needs, the Heybike Hauler offers dual-battery; the Ranger S doesn't.

Build, fit, and the cargo angle

Where the Ranger S meaningfully differs from the Mars 3.0 is the frame and rack. The step-through geometry drops the top tube to a true low-step (4'11" minimum standover) — making it usable for shorter riders, anyone with mobility limitations, or anyone who rides in a skirt or formal trousers and doesn't want to swing a leg over a top tube.

The rear rack is rated to 150 lb — a meaningful step up from the Mars 3.0's 100 lb rating. That's enough for either a Yepp Maxi child seat (5 lb seat + up to 49 lb child = ~54 lb total) plus 90 lb of cargo, or a standard pannier rack with 30 lb on each side plus a 90 lb top-mount. It's not a full cargo bike — for serious two-kid hauling you want the Heybike Hauler or a true longtail — but for one kid plus the school-run grocery stop, it's well within spec.

Folded dimensions are 40 × 20 × 31 inches, identical to the Mars 3.0. Unfolded the bike is 70 × 24 × 50 in. The fold is single-pivot mid-frame; takes about 15 seconds with practice. The bike fits riders 4'11" to 6'3" per Heybike's sizing chart. The seatpost telescopes 12 inches; handlebar is height-adjustable.

Tires are 20×4 Kenda fat tires (puncture-resistant) with reinforced sidewalls. Rated for paved + gravel + light off-road. The Ranger S has slightly less aggressive tread than the Mars 3.0 — Heybike tunes the Ranger more for street use.

Compromises at $1,199

The cuts to hit this price are about the same as the Mars 3.0:

1. Mechanical disc brakes, not hydraulic. 180 mm rotors. Stop fine but require more lever pressure than hydraulic and need pad-refresh every 600–800 mi.
2. Cadence sensor — power is on/off based on pedal motion, not pedal effort. Less sophisticated than the Mars 3.0's torque sensor; fine for cruising, jerkier in low-PAS modes.
3. Tourney-tier 7-speed Shimano cassette — gear range is fine for the bike's use case, shift quality is basic.
4. Front spring fork only — no rear suspension. The Mars 3.0's Horst-link rear is the differentiator there. The Ranger S is meaningfully less smooth on rough surfaces.

The Ranger S leans into different trade-offs than the Mars 3.0: it sacrifices the rear shock and the torque sensor to fund the step-through frame and the heavier-duty rear rack. For a step-through commuter who occasionally hauls cargo, this is the right trade. For an aggressive rider who wants suspension, look at the Mars 3.0.

Verdict

The Ranger S won Electric Bike Report's 2024 Best Folding E-Bike under $1,500 award for good reason: it's the only true 750W rated folding bike in its price tier with this combination of step-through frame + 150 lb rack + 692 Wh battery + UL certification. The compromises are honest and well-aligned with the use case it's designed for: relaxed step-through commuting with occasional small-cargo hauling.

If you currently own a Heybike Ranger (the original, non-S), the S adds the step-through frame and the larger rear rack — a meaningful ergonomic upgrade if those features matter to you. For a brand-new buyer, the choice between the Ranger S and the Mars 3.0 comes down to step-through-vs-top-tube and rear-rack-capacity-vs-rear-suspension.

If you're cross-shopping the Aventon Sinch.2 ST ($1,599), the Sinch wins on hydraulic brakes and torque sensor; the Ranger S wins on price ($400 less) and rear rack capacity (150 lb vs 65 lb). For most commuters, the Ranger S is the better value.