HKM-8410195 Commuter E-Bike Puts a 350W Hub and a Hidden 468Wh Pack Behind 26 x 2.125 Tires in Matte Black for the Daily Ride

350W · 36V 13Ah 468Wh · 26 x 2.125 · 50 mi · hidden battery · 7-speed · CHAO-YANG tires

A Lockable Cover and a Pack That Disappears Into the TubeUnderstated Looks and Real Range

A 350W rear hub with 80 Nm, a 36V 13Ah 468Wh pack tucked into the down tube behind a lockable cover, CHAO-YANG 26 x 2.125 tires, a suspension fork and mechanical discs, on a matte black carbon steel step-through frame with a rear rack. It is listed at 37 miles on the throttle, 50 miles on pedal assist and 20 mph, and the whole design is pointed at one thing: a bike you can leave locked up all day without it advertising what it is.

Matte black is the least interesting paint on the market and the most useful one for a bike that parks outside. Chain oil, road spray and the grey film that a wet winter leaves on a down tube all disappear into it, so the bike looks the same in March as it did in October without a wash. The trade is visibility: a black frame at dusk is harder to see than a white one.

The battery is the other half of the anonymity. It sits inside the down tube rather than in a case on a rack, so there is nothing to unclip, nothing to carry, and nothing obvious to steal. That is worth more than a removable pack at a station. The weight also stays between the wheels, so the bike balances when you lift it by the frame.

At a Glance

• 350W Rear Hub — 80 Nm, with a throttle and pedal assist
• 468Wh Pack — 36V 13Ah, inside the down tube
• 50 Miles Assist — 37 miles on throttle alone, listed
• 26 x 2.125 Tires — CHAO-YANG tread, city and light gravel
• Matte Black Frame — Carbon steel, step-through
• Hidden Battery — Lockable cover, nothing on show
• Three Ride Modes — Sport, pure electric and pedal assist
• Suspension Fork — Front travel, rigid rear triangle
• Mechanical Discs — Front and rear, cable actuated
• 7-Speed Drivetrain — Ride it home on a flat pack
• Internal Routing — Cables inside the frame
• Rear Rack — Frame mounted, with a tail reflector

Matte Black and a Hidden Pack

The frame is carbon steel in a step-through shape, painted matte black over the whole bike: frame, fork lowers, fenders and rack. Nothing on it is glossy, so a scuff on the top tube reads as texture rather than damage, and a bike that gets locked to a rail twice a day will collect plenty of both.

The 468Wh pack lives inside the down tube behind a cover that takes a key. That is a different proposition from a rack-mounted battery: the weight stays between the wheels, the bike balances when you lift it by the frame, and there is no second lock to think about in the rain.

Cables run inside the frame from the bars down to the motor and the rear brake. On a matte finish that matters more than on a painted one, because an external cable rubs a shiny line into matte paint within a season and there is no polish that will put it back.

• Frame: carbon steel, step-through, matte black
• Battery: 468Wh in the down tube, key-locked cover
• Fork: suspension, rigid rear triangle
• Brakes: mechanical disc, front and rear
• Tires: CHAO-YANG 26 x 2.125
• Routing: internal, bars to motor

Fitted as shipped: front and rear fenders, a rear rack with a reflector, an LED headlight, a kickstand and an LCD. The tires are CHAO-YANG 26 x 2.125, a common size with a tread for pavement and dry towpaths.

350W Hub and 468Wh of Pack

The motor is a 350W brushless rear hub rated at 80 Nm. That torque figure is the one worth reading: it is what gets a loaded commuter away from a light and up a bridge ramp without the motor sounding strained, and it is why this bike does not feel underpowered next to the 500W models. A geared hub also freewheels when you stop pedalling, so a descent with the assist off costs nothing.

Three modes are listed on the display: a sport mode that behaves like an ordinary bicycle, a pure electric mode on the throttle alone, and pedal assist with several levels. For a daily commute the useful pairing is assist on the way in and the throttle on the way home, which is what the 468Wh pack is sized for. It charges in place through a sealed port or comes out with the key if you would rather charge it at a desk.

Range is listed at 60 km on the throttle and 80 km on pedal assist, which is 37 and 50 miles. The throttle figure is the honest one for a commute, because holding a throttle drains any pack faster than pedalling, and a cold morning on top of that will take another ten percent. Figure two charges a week for twelve miles a day.

Who It Fits and How It Rides

One size covers riders from about 5 ft 4 in to 6 ft 2 in on an adjustable stem. The step-through front triangle is the part that sells it to riders coming back after a hip replacement or a long break: you step through rather than swinging a leg over a top tube, with a bag in one hand and a lock in the other.

At 20 mph it is quiet and planted, and the 7-speed shifter means the motor is an assistant rather than the whole drivetrain. The fork takes the edge off a cracked lane; the rear is rigid, which keeps a loaded rack steady.

• Daily commutes with all-day outdoor parking
• Errands with a bag on the rear rack
• Riders who would rather not advertise an e-bike
• Not for sand, snow or technical off-road riding

What's in the Box

Before the first ride: fit the front wheel, set the saddle and bars, check both brake levers and the throttle return, then charge the pack. Register the frame number the day it arrives, because a matte black bike in a rack of matte black bikes is hard to identify after the fact.

Color and Finish

Matte black covers the frame, fork lowers, fenders and rack, with black rims, a black cockpit and a black saddle. There is no accent colour at all, which is the point: this is the version of the bike that disappears into a rack rather than standing out in it.

Touch-up paint in matte black is available on request, and matte is harder to spot-repair than gloss. The wear points are the chainstay and the rack mounts.

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 468Wh pack charges in four to six hours, which is an evening, so there is no reason to leave it sitting at 100 percent for a week.

Check tire pressure weekly and the brake pads monthly, and check the cable tension at the lever after the first hundred miles, since mechanical discs settle in as the pads bed. Wipe the fork stanchions and the battery cover seal after a wet ride, oil the chain every few rides, and check the rear spoke tension after the first 20 rides, because a hub motor loads that wheel harder than a bicycle hub does.

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-8410195 · 26 in city commuter electric bike · 350W brushless rear hub rated at 80 Nm · 36V 13Ah 468Wh pack inside the down tube behind a key-locked cover · 37 miles on the throttle, 50 miles on pedal assist · 20 mph as configured · 7-speed drivetrain · mechanical disc brakes front and rear · suspension fork with a rigid rear triangle · CHAO-YANG 26 x 2.125 tires on black rims · internal cable routing · three ride modes · LCD display · throttle and pedal assist · LED headlight · front and rear fenders · rear rack with a tail reflector · carbon steel step-through frame in matte black · 265 lb load rating · four to six hour charge · built for daily commutes and all-day outdoor parking rather than sand, snow or singletrack