PearTune 4.0 Tuning kit for Bosch Smart System CX Gen4 + Gen5 with Rim Magnet
PearTune 4.0 Tuning kit for Bosch Smart System CX Gen4 + Gen5 with Rim Magnet
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PearTune 4.0 is a tuning kit for eBikes powered by a Bosch Performance Line CX (Gen4/Gen5) motors + Rim Magnet Sensor
Once fitted and activated it will remove the factory 15mph speed limit. PearTune works with eBikes fitted with or without a display. For bike's with displays, 19kmh will briefly appear after pressing - + - + on your controller, this indicates the chip is on.
It's fully tested on the latest 19.24 Bosch drive unit update and comes with a 1-year warranty
Installation Info (Read Before You Buy)
This tuning kit requires a moderate to advanced installation. Download Instructions here (PDF). It comes with three key components:
• Tuning module
• Replacement speed sensor
• Electromagnet unit
The motor will need to be removed to fit this kit. If you’re not comfortable working on your eBike’s motor, we highly recommend having it installed by a professional bike technician.
Important:
After purchase, we’ll reach out by email to confirm compatibility with your ebike before dispatching your order. There are a small number of ebikes that don't have enough space to fit the kit
⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.
Product Benefits
Product Benefits
Why choose this product:
- Plug & ride installation
- Simple activation using the light button
- Completely removes factory speed limit when active
Shipping & Returns
Shipping & Returns
We ship fast and free to the UK via Royal Mail Tracked 48. Tracked 24 is available as a paid option.
🇺🇸 USA
Free shipping on all orders
Your parcel is exported from the UK and handed to USPS for final delivery.
All tariff charges and import paperwork is handled by us. No surprise customs bills on arrival.
🇦🇺 Australia
Free shipping on all orders.
Parcels are delivered by Australia Post once they reach your local network.
We manage all import paperwork, so you won’t receive any unexpected fees.
🇨🇦 Canada
Shipped from the UK with full tracking via FedEx
Canadian orders may be subject to import duties or customs charges on arrival.
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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 Shimano EP801 motors
- Only select 'with Di2' variant if your bike has wireless shifting (most bikes do not have this)
- Not compatible with; Cannondale Moterra SL1 2025, Orbea bikes with EP8RS
Warranty
Warranty
In the unlikely event your product develops a fault or defect. We will replace it under warranty. All PearTune products come with a 1 year warranty.
To claim under warranty, simply contact us here
Important Legal Notice
Important Legal Notice
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.
