SpeedBox 3.0 Tuning Module for Bosch Mid-Drive Motors – Adjustable Speed Limit

The SpeedBox 3.0 is a third-generation tuning module built for e-bikes running Bosch mid-drive motors. It fits Active Line Plus, Performance Line, Performance Line CX, Performance Line Speed and Cargo Line drive units. Fourth-generation (Gen4) Bosch drive units are supported as well. The module lets you select the speed at which electric assistance stops.

What sets this generation apart is the display behaviour. Simple speed limiter workarounds halve your readings, so the screen shows nonsense above the cut-off point. The SpeedBox 3.0 keeps your real speed, maximum speed, average speed, trip distance and total odometer intact. Your dashboard therefore stays honest at every speed.

Control runs entirely through the controller you already have. Compatible displays include KIOX, INTUVIA, NYON, PURION and COBI. A short press of the WALK function shows 9.9 km/h on screen, confirming that assistance is unlocked. Trigger WALK again and 2.5 km/h appears, restoring the factory 25 km/h limit. Controllers without a WALK function use the – + – + button combination instead.

Key Benefits

• Accurate readings above 25 km/h – real speed, trip distance and odometer stay correct on the display.
• Selectable speed limit – choose your setting anywhere on the scale up to 99 km/h.
• Fast on and off switching – everything happens on the controller, with no extra buttons or apps.
• Works without WALK – controllers lacking WALK use the – + – + sequence to activate.
• Plug-and-play fitting – connects to original Bosch connectors, with no cutting or soldering.
• Colour-coded connectors – every plug carries its own colour, so assembly stays straightforward.
• Gen4 motor support – works with Bosch drive units built in 2020 and later.
• Automatic settings memory – your chosen limit is stored after roughly 5 seconds of inactivity.

Who Is This For

This tuning chip suits e-bikes fitted with Bosch mid-drive motors. Supported drive units are Active Line Plus, Performance Line, Performance Line CX, Performance Line Speed and Cargo Line. Fourth-generation Gen4 drive units are covered too, which makes the module relevant to a wide range of recent bikes.

On the cockpit side, the module pairs with KIOX, INTUVIA, NYON, PURION and COBI displays. Please note one important limitation: it is not designed for the Bosch Smart System, and it is not managed through the SpeedBox App. Check your display and drive unit generation before ordering.

The product is intended for off-road riding and private tracks, where changing the speed limit is legal. It answers a specific need: riders who find the factory 25 km/h limit too low on closed circuits. Note that the module does not alter motor power, torque or battery capacity. Instead, it changes only the speed at which electric assistance cuts out.

Technical Specifications

Why Choose the SpeedBox 3.0

The strongest argument is data integrity. Many alternatives distort what the screen reports, which makes trip planning and range estimates unreliable. Here, maximum and average speed figures stay true, so your ride log remains usable.

Flexibility is the second differentiator. Rather than a single fixed setting, you move through the scale using the assistance modes: Turbo, eMTB, Tour, Eco and back again. Values run from 1.5 (15 km/h) through 3.0 (30 km/h) up to 9.9, representing 99 km/h. Confirm your choice with a brief WALK activation or by turning the rear wheel a full 360°.

Finally, installation stays simple. Each plug connects in the direction of its lock, without twisting. Because every connector carries a colour marking, the chance of a wiring mistake is small. After fitting, it is worth testing the activation and limit-change sequences once. On a brand-new bike, ride at least 10 km before activating the module.

Frequently Asked Questions

Which Bosch motors does the SpeedBox 3.0 fit?

• Active Line Plus, Performance Line and Performance Line CX.
• Performance Line Speed and Cargo Line.
• Gen4 drive units produced from 2020 onwards.

Which displays work with this module?

• KIOX, INTUVIA and NYON.
• PURION and COBI.
• The Bosch Smart System is not supported.

How do I switch the module on and off?

• Briefly trigger WALK; 9.9 km/h means assistance is unlocked.
• Trigger WALK again; 2.5 km/h restores the 25 km/h factory limit.
• Without a WALK function, use the – + – + button combination.

Does the display still show correct data?

• Real speed, maximum speed and average speed stay accurate.
• Trip distance and total odometer remain correct.
• Readings are not halved above the standard cut-off.

How do I choose a different speed limit?

• Cycle through Turbo → eMTB → Tour → Eco → Tour → eMTB → Turbo.
• Values read 1.5 = 15 km/h, 2.0 = 20, 2.5 = 25, 3.0 = 30 and 9.9 = 99 km/h.
• Confirm with a short WALK press or one full rear wheel rotation.

Does installation require cutting or soldering?

• No. The module uses original Bosch connectors.
• Connect each plug in the direction of its lock, without twisting.
• Colour-coded plugs reduce the risk of assembly errors.

Does it increase motor power or battery capacity?

• No. Power, torque and battery capacity stay unchanged.
• Only the assistance cut-off speed is affected.

Do my settings survive a restart?

• The selected limit is stored after around 5 seconds of inactivity.
• New bikes should cover at least 10 km before first activation.

With support for five Bosch drive unit families, five display types and a limit scale reaching 99 km/h, the SpeedBox 3.0 gives closed-circuit riders precise control over their assistance cut-off. Accurate readings, controller-based switching and plug-and-play wiring make it a considered upgrade for Bosch-powered e-bikes used off public roads.