SpeedBox — break the limits

Installation

Plug it in. Ride.

No cutting, no soldering, no software to load. The module goes in line with the connectors your motor already has, which is why fitting takes minutes and comes straight back out.

SpeedBox 1.2 for Shimano module with its inline harness and connectors
One sealed board on a short harness. It plugs in between the motor and the speed sensor — nothing is cut and nothing is soldered.
SpeedBox 1.3 B.Tuning for Bosch Smart System
Bosch Smart System, Gen.4 — 1.3 B.Tuning
SpeedBox 1.2 B.Tuning for Shimano EP8 and E7000
Shimano EP8, E7000 — E-Tube port stays free
SpeedBox 1.2 B.Tuning for Bafang with 3-pin connector
Bafang 3-pin — count the pins on your motor plug

Before you start

  • Charge the battery — a flat pack makes the test ride useless.
  • Photograph the connectors before you unplug them.
  • Confirm the module name against your motor code one last time.
  • Keep the packaging and your order number for the warranty.

Tools

  • Torx and Allen key set for the motor cover
  • Crank puller for Bosch and Brose mid-drives (we stock it)
  • Torque wrench for the crank arm
  • A clean cloth and cable ties for routing
  • Your phone, if you bought a B.Tuning module

The five steps

  1. 01

    Switch off and lift the bike

    Remove the battery where the bike allows it, or switch the system fully off. Put the bike in a stand or hang it so the rear wheel turns freely — you will need to spin it in the last step.

  2. 02

    Open the motor cover

    Take off the drive-side motor cover with a Torx or Allen key. On Bosch and Brose mid-drives you also remove the crank arm with a crank puller to reach the connectors.

  3. 03

    Unplug the motor cable

    Find the speed-sensor and motor cable the manual identifies, release the locking tab and pull the plug apart. Nothing is cut — the module simply goes into the gap you have opened.

  4. 04

    Insert the module in line

    Push the module's plugs into both halves of the connector until they click, then tuck the board into the free space behind the cover with the cable routed clear of the crank.

  5. 05

    Refit, then test

    Close the cover, refit the crank to the correct torque and reconnect the battery. Spin the rear wheel with the system on and check the display reads normally before you ride.

Notes by motor

Bosch

Smart System bikes take the 1.x range and older Gen 2–4 bikes the 2.0 or 3.0. The crank puller is needed on both.

Shimano

Modules sit behind the motor cover on EP8, E7000, E8000, E6100, E6000 and E5000 drives. E-Tube port variants keep the diagnostic port usable.

Yamaha

Runs from PW through PW-X4 and the Giant-branded SynDrive motors. The module goes in line at the motor, under the cover.

Giant

SynDrive Pro and Sport motors use the Giant-specific harness. Cable routing behind the motor cover needs care on the Revolt and Trance ranges.

Brose and Specialized

Brose S-Mag, Specialized 1.1, 1.2, 2.1 and SL motors each take a specific harness — check the module name against the motor code before fitting.

Bafang

M-series drives use 3-pin, 4-pin or 8-pin connectors. Count the pins on your motor plug, because the module must match it exactly.

Step-by-step manual

Every module has its own illustrated manual for your exact motor. Open the library and find yours.

Browse manuals

Fitting a module allows assistance above 25 km/h. A bike modified this way is treated as a moped in South Africa and may only be used on private land or closed circuits — never on public roads. Fit it yourself only if you are comfortable working on your bike; otherwise ask us or your local dealer.