PearTune 3.0 for Shimano EP8, EP8-RS

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 is designed to automatically activate when the eBike is powered on. When PearTune is active - you will be able to ride at a speed of 25 mph (40 km/h) and even up to 31 mph (50 km/h)!

NOTE 1: Real speed will be displayed up to 14-15mph (21-25km/h), at higher speeds the bike will show incorrect, slower than real speeds.

NOTE 2: If the bike's lights are programmed to remain permanently ON, the tuning kit will not function. The tuning kit requires the lights to be OFF for activation.

If You can switch the lights ON and OFF - tuning kit can be deactivated by switching the lights ON. Your e-bike will then work the same as before installation of the chip.

I don't have lights active but I want to be able to deactivate my tuning kit:

Many bikes are delivered with the lights function inactive, which can be activated by any Shimano service upon request.

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.

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 Lifetime 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.