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Electric city bike Trek District+ 3 N7 B LS dark star 540 Wh

Electric city bike Trek District+ 3 Lowstep belt black: Active Line Plus 540 Wh, Nexus 7, 27.20 kg in L

$4,280.24 Incl. Tax

~~$4,721.02~~ MSRP

Recommended supplier selling price in 2026

Color

Black

Size

Size charts

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Trek District+ 3 N7 B Lowstep Dark Star: the bike that sleeps in the hallway

Deep black and with no frills, the Trek District+ 3 N7 B Lowstep Dark Star is designed to live alongside your home: its Gates belt leaves no grease marks on the floor or the hallway walls. A Bosch Active Line Plus motor, a 540 Wh battery, a Nexus 7-speed hub and full equipment, for 27.20 kg in L according to Trek.

Technical specifications

Frame	Alpha Platinum aluminium Lowstep (low step-over), removable integrated battery, cables integrated through the cockpit, 135x5 mm quick-release rear axle
Motor	Bosch Active Line Plus, Bosch smart system, 60 Nm (Trek figure); assistance cuts out at 25 km/h
Battery	Bosch PowerTube 540 Wh, integrated into the down tube and removable
Controls / display	Bosch Purion 200 on the handlebar
Drivetrain	Shimano Nexus C3001 7-speed internal gear hub, Gates CDC CenterTrack belt, 22T sprocket, ProWheel alloy 165 mm chainset
Fork	SR Suntour NEX-E25 coil spring, adjustable preload, 60 mm travel, 100 mm quick release
Brakes	Shimano MT200 hydraulic disc, Shimano RT10 centerlock 160 mm rotors
Wheels / tyres	Bontrager Kovee double-wall Tubeless Ready 23 mm rims, Shimano centerlock hubs / Bontrager E6 Hard-Case Lite 700x50 reflective tyres
Cockpit	Alloy 630 mm handlebar, 25 mm rise; Bontrager alloy adjustable-angle stem, Blendr compatible, 70 or 110 mm depending on size; ergonomic grips
Saddle / seatpost	Bontrager Boulevard saddle, alloy suspension seatpost 31.6 mm, 300 mm
Equipment	SKS front and rear mudguards, MIK-compatible alloy rear rack, Pletscher Comp Flex 18 kickstand, city pedals
Weight	27.20 kg in size L (Trek figure)

At a glance

✓ Gates CDC CenterTrack belt	✓ Nexus 7-speed internal gear hub
✓ Bosch Active Line Plus	✓ Removable PowerTube 540 Wh
✓ 60 mm suspension fork	✓ 27.20 kg in size L

Who is it for?

For the city dweller who keeps their bike in a flat, a hallway or a shared bike room and wants to avoid mess. It will also suit families sharing the bike between two people of similar height, thanks to the step-through frame and adjustable stem.

The LVR workshop view

The Gates belt: goodbye greasy chain. Instead of a chain, this District+ transmits your pedalling through a carbon-fibre-reinforced Gates CDC belt, guided by a central CenterTrack rail that stops it jumping off. It needs no grease, doesn't rust and won't stain your trousers. Combined with the Nexus hub, which keeps the gears inside, it forms the cleanest and quietest drivetrain in the District+ 3 range.

	Nexus hub + chain	Nexus hub + Gates belt	Shimano CUES derailleur
How it works	Gears hidden in the rear hub	Gears in the hub, carbon belt	External sprockets and derailleur
Shifting	Possible at a standstill, at red lights	Possible at a standstill, at red lights	While pedalling, smoothly
Maintenance	Low, chain to grease	Very low, no greasing	Regular: cleaning, adjustment
Who for	Simple urban journeys	Everyday use without the grime	Varied terrain, sporty rides

In short: the N7 B takes the 540 Wh battery of the N7 540 and replaces the chain with a Gates belt. You gain cleanliness and peace of mind on maintenance, ideal if the bike lives in the hallway or the office bike room.

The Pletscher Comp Flex 18 kickstand keeps the bike upright in a narrow hallway, and the SKS mudguards limit the mud brought indoors on rainy days. The Gates belt, dry to the touch, can brush against a coat or bag without dirtying it, which makes all the difference when the bike sleeps by the door.

The Shimano Nexus C3001 hub groups seven gears in a sealed housing: no derailleur sticking out and risking getting bent against a wall or in a crowded bike room. It only needs periodic servicing, which we carry out in the workshop along with checking the Bosch system.

Which District+ should you choose?

Model	Motor	Battery	Drivetrain	Weight (L)
District+ 3 N7 540 LS	Bosch Active Line Plus	540 Wh	Nexus 7-speed hub, chain	27.70 kg
District+ 3 N7 B LS	Bosch Active Line Plus	540 Wh	Nexus 7-speed hub, Gates belt	27.20 kg
District+ 4 N5 B LS	Bosch Performance Line	600 Wh	Nexus 5-speed hub, Gates belt	27.70 kg
District+ 3 R9 540 LS	Bosch Active Line Plus	540 Wh	CUES 9-speed derailleur	24.30 kg

Our take: among the 540 Wh versions, the N7 B is the cleanest to live with indoors. The derailleur-equipped R9 540 is the lightest quoted by Trek (24.30 kg) but needs its chain greasing.

LVR sizing advice

Four sizes cover riders from 147 to 203 cm. For an upright, relaxed ride in the town centre, go for the smaller size if you're unsure; for long rides, the larger size gives your legs more room. The L and XL get a 110 mm stem, compared with 70 mm on the S and M.

Size	S	M	L	XL
Rider height (cm)	147-155	155-173	170-185	185-203
Inseam (cm)	69-88	77-96	80-99	86-105
Stem (mm)	70	70	110	110

Source: Trek size guide. Bike fitting available in our Béziers shop.

Your questions

Will the bike make a mess indoors?	The belt carries no grease; only the tyres need a wipe.
Can two people share it?	Yes, if they're of similar height; the saddle and stem are easy to adjust.
Does the hub need servicing?	Periodic servicing in the workshop is enough, with no day-to-day adjustment.
Does the black scratch?	Like any paint; a clear frame protector limits scuffs.

The LVR Cycles verdict

The ideal District+ for flats and hallways, with no grease and no fragile derailleur. Its deep Dark Star black blends into any interior.

Pros
+ Clean belt for indoors
+ No exposed derailleur
+ Kickstand and mudguards as standard

Cons
- Over 27 kg to carry upstairs
- 60 mm fork without lockout

Why buy from LVR Cycles? As a Trek retailer in Béziers, we set up your District+ for one or two users, fit a frame protector if needed and service the belt drive.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.

Reference TRK-5354973

Data sheet