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Hey everyone..I can give a definitive answer because my Bosch Performance motor (on a Haibike Trekking) gave out after 10,000 miles. One of the parts inside the motor started to wear down and the motor lost about 50% of its functionality. At 11,000 miles I finally decided to replace the motor. I...

I installed a peartune on my 2015 trekking. I thought I'd give my feedback for anyone trying to decide which dongle to use. Overall I am very happy with the device - it does everything it's supposed to with only a few minor issues and seems to work better than some of the other dongles I've seen...