VOLspeed eBike Tuning Kit for Bosch Performance Line CX Rim Magnet Gen4/Gen5 (Preorder Ships 15th August)
VOLspeed eBike Tuning Kit for Bosch Performance Line CX Rim Magnet Gen4/Gen5 (Preorder Ships 15th August)
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This is a preorder, we expect to ship orders from 15/08/25
New for Summer 2025. This VOLspeed tuning kit is designed exclusively for eBikes powered by a Bosch Performance Line CX motor (Gen4 or Gen5) equipped with a Rim Magnet sensor (mounted on the rear wheel valve). Once installed & activated, it removes the factory 15mph (25km/h) speed limit, allowing you to unlock speeds of up to 28mph (45km/h).
Unlike other kits, VOLspeed is a single module fitted directly to the motor. Installation requires motor removal but uses the existing Rim Magnet for a clean, OEM-style finish that is completely invisible. Once fitted it needs a quick calibration, it's then activated through your handlebar controller, with no smartphone or app pairing required.
Install Info (Read Before You Buy)
To install this kit you will need to remove the bike's motor. Specialist knowledge & tools will be required, if you lack expertise you should have the kit installed by a specialist.
The module itself is mounted in a specific position on the motor, as a result there will be a few ebike models that simply do not have enough space inside.
Depending on what motor your bike has, please watch one of these install videos before buying:
Bosch Performance Line CX Gen4 Install Video
Bosch Performance Line CX Gen5 Install Video
Important: This tuning kit is only compatible with eBikes that have a Performance Line CX (Gen4/Gen5) motor & Rim Magnet. It will not work with spoke magnet models or bikes fitted with ABS. Once active, speed readings above the factory limit will not be accurate. As a result, a lower distance will be recorded by the bike's computer.
⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.
Product Benefits
Product Benefits
Why choose this product:
- Increase the bike's max speed up to 28mph (45kmh)
- Uses the original rim magnet, no wired speed sensor needed
- OEM style finish that is completely invisible
- Simple activation and speed setting using the handlebar controls
- No smartphone or app pairing required
Shipping & Returns
Shipping & Returns
We ship fast and free to the UK, USA, Australia & Canada. All orders are fully tracked and dispatched from our UK warehouse.
✅ Tariff-free shipping to the USA & Australia.
❌ Note: Orders to Canada may incur customs charges. Free shipping doesn’t apply to EU/EEA countries.
Changed your mind? No problem. We offer 30-day returns — no hassle, no stress.
If something’s not right, we’ll sort it.
🔍 See full Shipping & Returns info here
Compatibility
Compatibility
- Works with eBikes fitted with a Gen4 or Gen5 Bosch Performance Line CX motor + Rim Magnet Sensor (located on the rear wheel valve)
- This kit is not compatible with any other Rim Magnet models (Gen3 or SX)
- Please note that none of our products work with bikes fitted with ABS systems
Product Warranty
Product Warranty
In the unlikely event your product develops a fault or defect. We will replace it under warranty. All VOLspeed products come with a 2-year warranty.
To claim under warranty, simply contact us here
Software Updates
Software Updates
Updating your eBike’s motor firmware may block or disable your tuning kit.
We recommend avoiding firmware updates especially through service centres unless absolutely necessary. Most updates are optional, and a working eBike doesn’t usually need one.
Keep in mind:
✔ Firmware upgrades can remove tuning compatibility
✔ Tuning is only guaranteed to work with the firmware version available at time of purchase
✔ A blocked tuning kit due to a firmware update is not covered under warranty
If you’re unsure, reach out before updating. We’re here to help you keep your ride running exactly how you like it.
Important Legal Info
Important Legal Info
Existing eBike Warranty:
The use of any tuning products may void the warranty of your eBike. We take no responsibility for any damages resulting from the use of any of our products.
eBike Laws:
Electric bikes equipped with tuning devices are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with tuning products can be used exclusively on private property and entirely at one’s own risk. Under the EU's EN15194 regulation it is illegal to ride your eBike on public roads/cycle paths with a tuning device fitted.
By purchasing a device from eBike tuner ltd you agree that eBike tuner ltd cannot be held liable for any damage, injury, fine or cost to you, your eBike or anyone else involved in your particular incident.





Brilliant piece of Kit, its brought the bike alive, and now goes like a dream, no holding me back now 👌🏻
Brilliant, makes cycling so much more enjoyable.
Amazing it’s a must have for a eBike