The TSDZ2B is the updated successor to the classic TSDZ2, featuring an improved torque sensor, revised internal gearing and better thermal management for quieter, more responsive assistance. This 36V 250W variant is configured for pedal-assist with a 6km/h walk-assist mode only – there is no full hand throttle – so it is road-legal in the UK (EAPC) and can be ridden on public roads and cycle paths with no licence, tax or insurance. The torque-sensing bottom-bracket design reads your pedalling force and scales power naturally, giving a refined ride that feels like a stronger version of yourself. Includes motor, colour display, PAS, brake cut-off levers and loom. Fits standard threaded 68-73mm bottom brackets.


Tongsheng TSDZ2B 250W Mid-Drive Kit (36V) – Road Legal
UK road-legal (EAPC)
Original price was: £349.00.£279.20Current price is: £279.20.
Price includes 20% VAT.
Next-gen Tongsheng TSDZ2B 250W 36V torque-sensing mid-drive with 6km/h walk-assist. Road-legal in the UK (EAPC).
About this item
- Throttle: 6km/h walk-assist only
- Motor Power: 250W (continuous)
- Motor type: Mid-drive (bottom bracket), torque-sensing
- Rated power: 250W
- Voltage: 36V
- Generation: TSDZ2B (improved sensor)
- Bottom bracket fit: Threaded 68-73mm
In stock — dispatched within 2–3 working days
Free UK delivery on bikes · 30-day returns
| Brand | |
|---|---|
| Throttle | Walk-assist (6 km/h) |
| Motor Power | 250W (continuous) |
| Motor type | Mid-drive (bottom bracket), torque-sensing |
| Rated power | 250W |
| Voltage | 36V |
| Throttle | 6km/h walk-assist only |
| Generation | TSDZ2B (improved sensor) |
| Bottom bracket fit | Threaded 68-73mm |
| UK status | Road-legal (EAPC) |
UK road-legal (EAPC)
This electric bike meets UK Electrically Assisted Pedal Cycle (EAPC) requirements: a 250W motor providing pedal-assistance that cuts off at 15.5 mph (25 km/h). It can be ridden on UK roads, cycle paths and bridleways with no licence, registration, road tax or insurance required, by riders aged 14 or over.
Manufacturer Warranty
All e-bikes sold by VOLTARC come with the full manufacturer's warranty. Coverage typically includes:
- Frame & Fork — 2–5 years against manufacturing defects
- Motor & Battery — 2 years (capacity guarantee: ≥60 % after 500 charge cycles)
- Electrical components — 1–2 years
- Consumables (brake pads, tyres, chain) — not covered
How to make a claim
Email support@e-bikes.biz with your order number and a description of the issue. We aim to respond within 1 business day.
Extended Support
VOLTARC offers optional 3-year extended cover for an additional fee. Ask us at checkout.
No. EAPC (Electrically Assisted Pedal Cycle) e-bikes are legal on UK roads without a licence, insurance, or registration, provided the motor assists only while pedalling and is limited to 250 W / 15.5 mph.
Range depends on the battery size, rider weight, terrain, and assist level. Check the specific product specification for its stated range; typical figures are 40–120 miles per charge.
Most batteries charge in 3–6 hours from flat using the supplied charger. Fast-charge options (where available) can halve this time.
Yes. Our bikes carry an IP rating (see spec tab) and are designed for UK weather. Avoid submerging the battery or motor. Dry and lightly oil the drivetrain after wet rides.
14-day hassle-free returns on unused bikes in original packaging. For faulty bikes we will arrange a free collection. See our returns page for full details.
Finance is not yet available at checkout — it's planned for a future release. See our Finance page for the latest status and to register your interest.






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