HKM-2637267 Folding E-Bike Carries a 250W Hub and a 48V 15Ah 720Wh Pack on 14 x 2.125 Tires for the Last Mile Commute

250W · 48V 15Ah 720Wh · 14 x 2.125 · 265 lb · 37 miles · single speed · 2-step fold

Light Low and Softly Sprung for the Newest Rider in the FamilyA First Real Bike With a Motor Inside

A 250W rear hub, a 48V 15Ah 720Wh pack under the seat, 14 x 2.125 tires, a sprung fork with twin coil shocks at the back and mechanical discs at both ends, on a carbon steel frame that folds in two steps. It is listed at 37 miles and 20 mph with a 265 lb rating, and it is single speed, which on a bike this size is a feature rather than a shortcut: there is no mech hanging near the ground and nothing to index.

This is a last-mile machine, and the geometry says so: a single main beam, a short wheelbase, 14-inch wheels and a seat that sits you upright with your hands high. Fold it in two steps and it stands on its own wheels, small enough for a car boot, a hallway corner or the space under a desk, which is the difference between a folding bike that gets used and one that lives folded in a garage.

One gear is the honest choice here. A two-speed or a derailleur on a 14-inch wheel adds a mech hanging near the ground and a cable to stretch, for a gear range you would not use at 15 mph. With a 250W hub and a 720Wh pack, the motor does the work the missing gears would have done, and there is nothing to index or adjust.

At a Glance

• 250W Rear Hub — Brushless hub with throttle and pedal assist
• 720Wh Pack — 48V 15Ah under the seat, key-locked
• 37 Miles Listed — A big pack for a 250W motor
• 14 x 2.125 Tires — All-terrain casing on small wheels
• 2-Step Fold — Frame and stem, no tools
• Single Speed — One gear, nothing to index
• Twin Coil Shocks — Rear springs plus a sprung fork
• Mechanical Discs — Front and rear, cable actuated
• 265 lb Rating — 120 kg for rider and a bag
• Carbon Steel Frame — Matte black, folds to a standing package
• IP54 Rated — Splash resistant, not submersible
• LCD Display — Speed, battery and assist level

Frame, Fold and Small Wheels

The frame is carbon steel in a single-beam shape with one hinge in the main tube and a second release at the stem. Two steps, no tools, and the folded package stands on its own wheels rather than lying flat, which matters in a hallway where there is nothing to lean it against.

The battery sits in a case below the seat rather than in the beam, key-locked and wired through a sealed port. It lifts out for indoor charging, and the position keeps the weight low and central on a bike whose wheelbase is barely longer than a doorway.

Suspension is a sprung fork up front and a pair of coil springs under the rear rack, which is more travel than most 14-inch folders offer. On small wheels that is the difference between a bike you ride and a bike you feel every paving slab through.

• Frame: carbon steel, single beam, one hinge
• Stem: folding release, no tools
• Battery: 720Wh case under the seat, key-locked
• Suspension: sprung fork, twin coil springs at the rear
• Brakes: mechanical disc, front and rear
• Tires: 14 x 2.125 all-terrain

Fitted as shipped: front and rear fenders, a rear rack with a reflector at the tail, an LED headlight, a kickstand and an LCD on the bars. The tires are 14 x 2.125 all-terrain, wide enough to cope with a gravel path and narrow enough to keep the folded package small.

250W Hub and a 720Wh Pack

The motor is a 250W brushless rear hub with a throttle on the right grip and pedal assist through the display. On 14-inch wheels a 250W hub feels stronger than the number suggests, because the wheel spins up fast: it is enough for a 15 mph cruise and for the bridge on the way to the station, and the pack behind it is large enough that the motor rarely has to work at its limit. It is not built for a highway shoulder, and it does not pretend to be.

The pack is 48V 15Ah, 720Wh, which is roughly double what this class of folder usually carries. That is why the listed range is 37 miles rather than the 18 to 22 a 10Ah pack in the same frame would give, and it is why the bike weighs what it does. It sits below the seat rather than in the main beam, so the weight stays low and central on a bike with a short wheelbase. Charge time is listed at five to seven hours on the supplied charger.

Range is listed at 37 miles, and the honest split is between throttle and assist: expect the low twenties with the throttle held open, and something near 37 at a steady 12 mph with the motor helping rather than driving. Cold weather and a loaded rack pull it down, so a 6-mile daily round trip is two charges a week.

Who It Fits and How It Rides

The seat post and the bars both adjust, so one frame covers riders from about 5 ft to 6 ft 3 in, with a 265 lb rating that includes a bag on the rack. The riding position is upright with your hands high, closer to a small-wheel city bike than to a scooter, and the short wheelbase makes it nimble in traffic.

On pavement it is quick to steer and firm over cracks, and the twin rear springs take the sting out of a pothole. On gravel the 2.125 casing copes; on kerbs, stairs and wet tram tracks it does not. The small wheels are the reason.

• The last mile between a station and a front door
• A boat, a caravan or a car boot where a full-size bike will not go
• Short errands in town at 12 to 15 mph
• Not for kerbs, stairs, tram tracks or long-distance touring

What's in the Box

Before the first ride: unfold the frame and check that both releases are seated, fit the pedals, set the seat post and bar height, check both brake levers and the throttle return, then charge the pack. Fold and unfold it once at home before you rely on it in a car park in the rain.

Color and Finish

Matte black covers the frame, fork, fenders, rack and rims, with a black cockpit and saddle and purple anodising on the rear springs as the only colour. It is a plain finish for a bike that folds against bumpers and boat lockers, and it hides road film well.

Touch-up paint in the matching black is available on request. The wear points are the hinge, the stem release and the chainstay under the chain.

Battery Care and Maintenance

Charge the pack between 20 and 90 percent for daily use and take it to full about once a month so the management system can balance the cells. A 720Wh pack is large for a folder, so it is worth charging it off the bike indoors rather than in a cold car or a shed.

Check tire pressure weekly, at 30 to 40 psi on small wheels, and check the hinge and stem release for play every month, since those two joints take the whole load on a folder. Check the brake pads monthly and the cable tension at the lever, and wipe the fork stanchions after a wet ride. The hinge is the part that decides whether it still feels solid after a season.

Specifications

Frequently Asked Questions

Service and Policies

Coverage that lasts beyond the box. Orders ship free with a tracking number in 2 to 5 business days. From delivery, the product is protected for 180 days against manufacturing defects and transit damage, returnable within 30 days for a full refund, and covered by a 24-month parts-and-labor warranty on manufacturing defects. Four policies, one idea: ship it free, protect it for 180 days, take it back for 30, and stand behind it for two years.

HKM-2637267 · 14 in folding electric bike · 250W brushless rear hub · 48V 15Ah 720Wh case under the seat, key-locked and removable · 37 miles listed range · 20 mph as configured · single speed drivetrain · mechanical disc brakes front and rear · sprung fork with twin coil springs at the rear · 14 x 2.125 all-terrain tires on black rims · two-step fold with no tools, stands on its own wheels · carbon steel frame · LCD display · throttle and pedal assist · LED headlight · front and rear fenders · rear rack with a tail reflector · 265 lb load rating · IP54 rated · matte black with purple springs · five to seven hour charge · built for the last mile, a car boot, a boat or a caravan rather than kerbs, stairs or touring