VOLspeed eBike Tuning Kit for Bosch Performance Line CX Rim Magnet (Gen4 Only)
VOLspeed eBike Tuning Kit for Bosch Performance Line CX Rim Magnet (Gen4 Only)
Couldn't load pickup availability
New for 2025, this VOLspeed tuning kit is designed exclusively for eBikes powered by a Bosch Performance Line CX motor (Gen4 only) 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). It's fully tested on the latest 16.19 software update too.
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.
Click here to view our list of incompatible bikes.
💡Access the instruction manual for this kit
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 with Royal Mail. Shipping rates for the USA, Australia & Canada are shown clearly at checkout – no hidden fees
🇺🇸 We cover all US import paperwork for you and ensure no surprise bills on delivery. Just one flat fee of $39 USD
🇦🇺We cover all AU import paperwork for you and ensure no surprise bills on delivery. Just one flat fee of $39 AUD
🇨🇦 Orders to Canada may incur customs charges on delivery
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
- Scott Strike 920 requires the bike's frame to be altered slightly. Contact us for more info if you have one of these.
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.
Great product! I ordered 2 one for my Santa Cruz Vala and one for my Santa Cruz Bullit. I used it first without a display. It can be a bit tricky to activate without a display. But then upgraded to the Kiox 400c and it is very user friendly
Great product, excellent communication!!
Fast shipping, TY
this VOLspeed kit has transformed my bike it now has the power it should have from the factory, easy enough to fit and it works with the latest firmware update
Love it. Wouldn’t want to go back to the standard speed now
Great product and works well - fantastic