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Electric city bike Trek District+ 3 N7 B LS cobra blood 540 Wh

Electric city bike Trek District+ 3 Lowstep belt red: grease-free Bosch 540 Wh, 27.20 kg in L

Kč72,960.57 Incl. Tax

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Trek District+ 3 N7 B Lowstep Cobra Blood: sea air without the rust

This Trek District+ 3 N7 B Lowstep in Cobra Blood red, an intense burgundy, is built for those who live near the sea. Its Gates belt doesn't rust, and its Nexus 7-speed hub keeps the gears protected from sand and moisture. Bosch Active Line Plus motor, 540 Wh battery, 27.20 kg in size 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 residents of Valras, Sérignan or Portiragnes who ride in salty air, and for anyone who hates maintenance. It's for the rider who wants an electric city bike to take out, use and put away, without thinking about it between services.

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.

Sea air attacks a chain within weeks: rust, squeaks, accelerated wear. The Gates belt, with no exposed metal, isn't affected by corrosion, and the Nexus hub encloses its gears in a sealed housing. An occasional rinse with fresh water is enough to keep the drivetrain in good shape after a ride along the seafront.

On the cycle path linking Béziers to the coast, the headwind is often the real climb: the Active Line Plus motor supports you smoothly and the 540 Wh battery leaves a margin for the round trip. Once you reach 25 km/h, the assistance cuts out, as on any approved e-bike.

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: the N7 B is the District+ 3 best equipped to handle damp conditions, at 27.20 kg. For more push into the wind, the N5 B combines a Gates CDX belt with the Performance Line motor.

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

Does salt affect the belt?	No, it doesn't rust; just rinse it with fresh water.
And the other parts?	Rinse the bike with fresh water after riding by the sea, without a pressure washer.
Is a headwind a problem?	The Bosch motor compensates; choose a higher mode on the way back.
Does the red fade in the sun?	Store the bike under cover to preserve the shine of this deep red.

The LVR Cycles verdict

The District+ for coastal dwellers and anyone allergic to maintenance, with a drivetrain that doesn't rust. Its Cobra Blood burgundy red never goes unnoticed.

Pros
+ Rust-proof drivetrain
+ Sealed hub, protected from sea spray
+ Distinctive burgundy shade

Cons
- Belt replacement more specialised
- 27.20 kg in size L

Why buy from LVR Cycles? In Béziers, we explain the right maintenance for seaside riding, check the belt and hub and handle the Bosch updates.

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-5354981

Data sheet