PearTune 3.0 for Shimano EP8

This Peartune tuning kit removes the 16mph (25km/h) speed limit, allowing the motor to help you at higher speeds. For these Shimano bikes, the speed limit is raised to 31mph (50km/h).

Real speed will be displayed up to 14-15mph (21-25km/h), at higher speeds the bike will show incorrect, slower than real speeds.

The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:

Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]

The tuning kit can be activated directly from your bike’s display by pressing the 'LIGHT' switch. Once activated, the tuning kit allows you to reach speeds of 25 mph (40 km/h) and even up to 31 mph (50 km/h)!

To deactivate the tuning kit, press the 'LIGHT' switch again. Your eBike will then function as if the chip is not installed.

If there are no lights installed on the eBike or the Light button function is not active, do not connect the red cable. In this case, the tuning kit will be activated when you power on the eBike.

This Peartune tuning kit is made to fit all Shimano EP8 motors, with all Shimano displays made for EP8 motors. Not compatible with Shimano EP801!

Works with the Giant Revolt E+ Di2 powered by Shimano EP8 (mind product options)

Not Compatible with Shimano E8000 / E7000 / E5000. You would need Peatune for Shimano E8000 / E7000 / E5000. Not Compatible with Shimano EP801. You would need PearTune 3.0 for Shimano EP801/EP6

The MSO can be activated or deactivated anytime using the bike menu's light control function. Refer to the bike manual for detailed instructions. If the lights are ON, PearTune MSO is OFF. When the lights are OFF, PearTune MSO is ON. If you disconnect the red power cable, PearTune MSO will be "always ON," meaning it will activate automatically when you switch on your bike. If you have any troubles with installation or disassembly, do not hesitate to contact us.

If you are planning to install PearTune on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated.

Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use of Peartune products. Electric bikes equipped with Peartune products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with Peartune products can be used exclusively on private property and entirely at one’s own risk. The use of Peartune products may void the warranty of your ebike.

We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.

Peartune products are thoroughly tested and we stand by their quality - Peartune provides 2 years warranty to all their products.

Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.