The summer cycling season is in full swing, and the Czech tuning chip manufacturer PearTune is definitely not slacking off. To always bring you the best for your e-bikes at greatebike.eu, we closely monitor news from their development workshop. And this time, it is really worth it! The developers have prepared major improvements for owners of Yamaha, Specialized, Avinox drives, as well as the most widespread Bosch system.
Let's take a look at a comprehensive overview of the most interesting new things you can get for maximum riding pleasure without a speed limit.
1. Long-awaited news: Tuning for the latest Yamaha PW-X4 motors
Owners of top-tier e-bikes with the new generation of Japanese motors have finally got their wish. PearTune is officially launching a custom-developed chip for Yamaha PW-X4 drives.
This motor stands out with great dynamics in demanding terrain, which is often unnecessarily hindered by the legal limit of 25 km/h. With the new PearTune MSO (Max Speed Off) module, you will fully unleash the motor's potential, while maintaining the correct display of data on your screen.
Check out our range of tuning chips for the PW-X4 here.
2. Specialized 3.1: Easier "Plug & Play" installation with original connectors
With tuning modules, it's not just about what they can do, but also about how easily they can be installed. PearTune has significantly improved its popular line of chips for Specialized motors (version 3.1).
These products are newly equipped with original factory connectors that 100% match the manufacturer's standards. Forget about complicated wiring – installation is now a pure "Plug & Play" affair. The connectors snap together on the first click, ensuring absolute connection reliability that neither moisture nor dust can penetrate, even during the toughest enduro riding.
You can find the improved modules here.
3. Avinox drive: Detailed photo manuals for each product
The super-powerful Avinox motor is becoming a huge hit on modern e-bikes. To make the installation of the speed unlocker for this system completely hassle-free and safe, PearTune has prepared detailed picture manuals.
In the details of products intended for Avinox systems, you will now find complete step-by-step picture guides. With these detailed photo manuals, anyone can handle the installation safely and confidently within a few minutes.
Explore the Avinox range here.
4. Great news for Bosch owners: Full compatibility with the latest 20.27 update (July 2026)
The most important topic of recent weeks among e-bikers is undoubtedly the major software update from Bosch for Bosch Smart System systems (version 20.27 from July 2026). This update brings riders a noticeable improvement in torque, but many users were worried about whether the update would block their tuning.
We have great news for you! The PearTune development department immediately investigated and tested the situation. The result is 100% positive: All PearTune chips for the Bosch Smart System and Bosch Smart System + RIM magnet remain fully compatible with the new 20.27 update.
You can therefore safely update the software of your motor to the latest version in the eBike Flow app, enjoy the improved torque, and not lose the benefits of the unlocked limit in the process.
The complete range for Bosch motors here.
Want to squeeze the maximum out of your e-bike? We will advise you at greatebike.eu
Whether you ride an e-MTB or an urban crossover, PearTune products represent the pinnacle of safe and reliable tuning, developed right here in the Czech Republic.
If you are unsure about choosing the right model for your e-bike, feel free to contact us.
