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  1. C

    Shimano E6100 strange problem

    I have a BMC Alpen challemge AMP bike which has the E6100 motor fitted, had it for two years It has developed a very strange problem, when I first set of the the handlebar display unit shoots upto 30 mph ish and then drops down to the actual speed Once pedalling if I put any kind of force into...
  2. C

    Morning from sunny UK

    Morning new to this forum I have been cycling for years, retired two years ago (aged 60) after 44 years in the aerospace industry Part of my retirement present was a BMC Alpen challenge AMP electric assist bike. This bike is fitted with the shimano 6100 step power system which has now developed...
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