Differences between Derby Cycles Impulse2.0 and Impulse2.2

The durable Impulse1.0 motor that was developed in coorperation with Daum Inc. in 2011 was developed further and installed as Impulse2.0 in several bikes model year 2014, 2015 and 2016.

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The Impulse motors from Derby Cycle – constructional changes in 2018

It’s August 2017, event in Cloppenburg at Derby Cycle – it’s an obligatory event for everybody, who had troubles within the last two years with the Impulse2.0 and EVO motors. The customers are bothered and discontented. The dealers are in the line of fire between frustrated pedelec bikers with their motor problems and Derby Cycles field stuff that denied that there exist problems with the motors. But a dealer needs customers. So what should a dealer do? He calms down the customers and changed the motor, well knowing that the next failure will occur in a few month. That’s the normal process of all dealers – really all dealers? No! A few people put the screws on Derby, they want solutions and a reliable motor for their customers, else they will thread with consequences.

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Alasdair’s Giant Quick-E+ (US) with Yamaha PW (Quick&Dirty)

Alasdair is no member of the pedelecmonitor. I found his bike review on an EBR-Forum-Thread. The header was „my biggest issue with the ebike reviews, is that I can’t find any reviews over long term use“ – he matched exactly my thoughts.

So I was asking for reviews – positives and negatives. Here is Alasdairs statement about his Giant Quick-E+ with the Yamaha PW syncdrive.


I also have a child seat on it to run errands with my 14mo, he loves it![…] Continue reading