The Sparta d-Burst M8Tb is the flagship of Sparta’s sporty d-series, built for confident urban commuting and longer rides over hilly terrain. At its heart sits a Bosch Performance Line CX mid-motor delivering a punchy 85 Nm of torque, paired with a frame-integrated Bosch PowerTube battery (400, 500 or 625 Wh depending on configuration) that returns up to around 110 km of range. Power is managed through a clear, centrally mounted Bosch Intuvia display.
Where many e-bikes use a chain, the d-Burst runs a clean, low-maintenance carbon belt drive matched to a Shimano Alfine 8-speed internal hub, so shifting stays smooth even when stationary and there is no oily chain to fuss over. Hydraulic disc brakes, 28-inch wheels and a stiff aluminium low-step frame round out a composed, sure-footed ride.
- Bosch Performance Line CX motor, 85 Nm torque
- Maintenance-free carbon belt drive with Shimano Alfine 8-speed hub
- Frame-integrated, removable Bosch PowerTube battery
- Hydraulic disc brakes and integrated lighting
- Pedal-assist to 25 km/h – UK road-legal EAPC, no throttle
A Closer Look at the Sparta d-Burst M8Tb
The Bosch Performance Line CX motor’s 85Nm of torque is Bosch’s higher-output drive unit, more commonly seen on trail eMTBs than trekking bikes — on the d-Burst it translates to confident hill-climbing on a bike built for commuting and longer leisure rides rather than trail riding. The frame-integrated PowerTube battery is offered in 400, 500 or 625Wh depending on configuration, giving up to around 110km of range on the largest option.
What sets the d-Burst apart from a typical Bosch-powered commuter is the drivetrain: a carbon belt in place of a chain, matched to a Shimano Alfine 8-speed internal hub. There’s no oily chain to catch trouser legs or transfer grime, shifting stays smooth even when stationary at lights, and the belt itself needs none of the lubrication a chain does.
Who Rides the d-Burst M8Tb, and Where
This suits confident urban commuters and riders covering hilly terrain who want low-maintenance running gear rather than a chain to clean and lube. Because assistance is pedal-only, capped at 25km/h with no throttle, it’s a fully UK road-legal EAPC (250W class) requiring no licence, tax or insurance.
Setup & Care
The carbon belt drive needs virtually no maintenance beyond an occasional check of belt tension and pulley alignment — refer to the manual below for the correct procedure rather than treating it like a chain. Charge the removable PowerTube battery per Bosch’s guidance, and the Bosch Intuvia display will flag any system faults early. Hydraulic disc brakes and integrated lighting should be checked as part of a normal pre-ride routine.
Downloads
Sparta d-Burst M8Tb: Frequently Asked Questions
Why a belt drive instead of a chain?
A carbon belt doesn’t need lubrication, won’t rust, and lasts significantly longer than a chain under normal use — a genuine low-maintenance advantage for year-round UK commuting, at the cost of needing a specific frame design to fit it.
Is it road legal, and do I need a licence?
Yes — pedal-assist only, no throttle, capped at 25km/h, making it a fully UK road-legal 250W EAPC. No licence, tax or insurance is required.
How do I pay, and is finance available?
We currently accept payment by bank transfer. Card payments are coming soon — finance is planned but not yet live; see our Finance page.
What’s your returns policy?
14-day hassle-free returns on unused bikes in original packaging; faulty bikes receive a free collection. Full terms on our Delivery & Returns page.
What’s the maximum range?
Up to approximately 110km with the largest 625Wh PowerTube battery, depending on terrain and assist level.
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