HKM-3619411 29-Inch Full Suspension Electric Mountain Bike 1000 W Geared Rear Hub 27-Speed Kenda Knobby 48 V 922 Wh

HKM-3619411 · 1000 W Rear Hub · 922 Wh · 28 mph · 27 Spd · 70 mi Low Assist · 55 lb · 29 x 2.4 in Kenda Knobby

A Geared Rear Hub and an Air Fork That Keep 29 Inch Wheels RollingRear Hub Pull on a Real Trail Frame

HKM-3619411 is a 29 in full suspension electric mountain bike built around a 1000 W geared rear hub and a 48 V 19.2 Ah pack of about 922 Wh. The aluminum frame carries an air sprung fork with lockout and a frame mounted rear shock, so roots and broken pavement reach the rider as movement. Twenty seven gears cover the fire road climb and the flat ride home, and a twist throttle covers the stretches where pedaling stops being fun. At about 55 lb it is a trail bike with a motor bolted in.

A geared hub motor in the rear wheel keeps the drivetrain simple and lets the bike pedal like a normal bike when the assist is off, which matters on a technical descent where the motor is only in the way. The battery sits inside the down tube and lifts out with a key, so the charge happens indoors on a counter rather than next to the bike in a shed. Up front the air fork takes the bigger hits, out back the shock keeps the rear tire on the ground.

It is bought by riders who want a real trail bike first. The slack head angle puts the rider between the wheels rather than over the bars, 27 gears cover a steep switchback to a flat bike path, and disc brakes with a 180 mm front rotor do the slowing. Range reads in bands: up to 70 mi in low assist, closer to 35 mi when trail and assist both go up.

At a Glance

• 1000 W Rear Hub — Geared brushless motor that pulls to 28 mph on assist
• 922 Wh Pack — 48 V 19.2 Ah battery hidden in the down tube
• 28 mph Ceiling — Top assisted speed on flat ground
• 70 mi Low Assist — Rated range on pavement, about 35 mi on hard trails
• 27-Speed Drivetrain — Triple chainring with a 9 speed Shimano cassette
• Full Suspension — Air sprung fork with lockout plus a frame mounted rear shock
• Disc Brakes — 180 mm front rotor and 160 mm rear rotor
• 29 x 2.4 in Kenda — Knobby tires that hold a loose line
• Backlit LCD — Speed battery level assist mode odometer and trip on the bar
• Five Assist Levels — Cadence sensing plus a twist throttle on the right grip
• Integrated Lights — LED headlight and brake light run off the main battery
• 55 lb Complete — 25 kg on the scale with the battery fitted
• 330 lb Rating — 150 kg covering rider and gear on the seat

Frame, Motor and Battery

The frame is aluminum alloy in a full suspension layout, the rear wheel hung on a four bar linkage. That keeps the tire planted through a root garden instead of skipping across it. The air sprung fork takes the bigger hits and locks out on the road.

A 1000 W geared brushless motor sits in the rear wheel, so the chain line stays standard and the bike pedals normally with the power off. Geared hubs give up a little noise for low speed pull on steep climbs. A triple ring and a 9 speed cassette make 27 gears.

Both wheels are 29 in with 2.4 in knobby Kenda tires, a size that rolls over roots and broken pavement and still leaves room for real tread. Disc brakes sit at both ends, with a 180 mm rotor up front and a 160 mm out back over stainless 13 gauge spokes.

• Air sprung suspension fork with lockout lever on the crown
• Frame mounted rear air shock with adjustable preload
• Internal cable routing through the frame and the down tube battery bay

Fitted as standard: a backlit LCD showing speed, battery level, assist mode, odometer and trip distance, buttons on the left grip, a twist throttle on the right grip, and integrated LED headlight and brake light wired through the controller.

Battery, Range and Charging

The 48 V 19.2 Ah pack works out to about 922 Wh and lives inside the down tube, sliding up and out with the key for indoor charging. Inside, 21700 format cells run under a management system against overcharge, over discharge and short circuit, and an LED on the side shows state of charge off the bike. The keyed cradle keeps the pack put at a trailhead. The bay also shields the cells from spray thrown up by the front wheel.

Range is a function of assist level, grade, rider weight and tire pressure, and the honest way to read it is in bands. On flat pavement in assist level one the bike is rated up to 70 mi. On steep trail in assist level five with a heavy rider, the same pack is closer to 35 mi. Cold mornings pull the top figure down further, and the halfway rule is how most riders learn the real number.

A full charge takes 4 to 6 hours on the included 2 A charger, and the pack is rated past 800 cycles before capacity falls below about 80 percent. A walk assist mode pushes the bike at about 3.7 mph up stairs and ramps, and the twist throttle covers the same ground without pedaling.

Who It Fits and How It Rides

One frame size covers riders from about 5 ft 7 in to 6 ft 3 in and up to 330 lb of rider and gear, with saddle height and stem adjustable to close the rest of the gap. It suits trail loops on gravel and hard packed dirt, rough commutes over broken pavement, and weekend rides that mix both.

What it is not is a lightweight road bike. At about 55 lb with the battery it rewards planning on stairs and racks. Inside its element it does the same job weekly: pull up the climb, hold the line down, roll home on pavement.

• Trail loops on loose gravel and hard packed dirt
• Rough commutes over broken pavement and bike paths
• Weekend rides that mix climbs descents and road sections

What's in the Box

The bike ships in one carton at 90 percent assembled, so the first job is turning the bars straight, checking pedals and quick releases, and charging the pack fully before the first ride. Check each item against the list, and keep the carton for the first month in case a part goes back.

Colors and Finish

The frame comes in grey, red and blue over black trim, each a smooth coat that keeps its depth in the sun. Black stays on the fork lowers, the bar, the saddle and the rims, so the color reads as one clean shape across the top tube and the down tube rather than scattered over parts.

The grey option pairs with either a color or a black and white display, while the red and blue frames come with the color display fitted as standard on the bar.

Battery Care and Maintenance

Charge the pack indoors at room temperature and unplug it when full. If the bike sits for a month, store the pack between about 30 and 70 percent charge and top it up every few weeks; lithium cells age fastest at empty and full. Cold mornings below 40 F pull 10 to 20 percent off capacity until the pack warms.

Check tire pressure before rides at 45 PSI or the sidewall rating, confirm the battery is locked in and the brakes bite firm. Wipe the frame with a damp cloth after muddy rides and keep water out of the display and the charge port. Clear grit from the brake pads after wet rides, and have the fork and shock serviced yearly on real trail use. The charge port cap stays shut between rides.

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-3619411 is the trail bike with a motor in the rear wheel: 29 in wheels in a full suspension aluminum frame, an air sprung fork with lockout, a frame mounted rear shock and a 1000 W geared hub that pulls to 28 mph. The 48 V 19.2 Ah pack hides in the down tube at about 922 Wh, good for 70 mi of low assist or about 35 mi of hard trail, and 27 gears cover the climbs between. Disc brakes run 180 mm and 160 mm rotors, the 2.4 in Kenda knobbies hold a loose line, and 55 lb of bike carries 330 lb within a 5 ft 7 in to 6 ft 3 in fit. Five assist levels and a twist throttle cover the legs that are done, and the keyed pack charges indoors in 4 to 6 hours. It asks for planning on stairs at 55 lb, and it is a trail machine rather than a road bike. Charge the pack indoors and the bike does the same quiet job every week.