This is a real problem, especially the 500W maximum power issue. This would immediately make most eBikes on the market illegal, unless we can claim grandfather rights. Bikes built to this spec will not be legal in Europe.
It's not maximum power though:
Proposed changes
The government proposes 2 changes to existing regulations:
- to amend the legal definition of how EAPCs are classified so that the maximum continuous rated power of the electric motor must not exceed 500 watts instead of 250 watts as set out in the current regulations
- to allow ‘twist and go’ EAPCs to have throttle assistance up to 15.5mph (25km/h) without the need for type approval.
That is no different from as at present, maximum continuous rated power, i.e. double the present power.
I've supported the proposal and it is clear from the way the questionaire is steered that the DfT does too. Below are my two key responses to the two questions:
"A lifetime of assisted cycling knowledge from joining the trade in 1950 when the assistance came from tiny add-on petrol motors and always keeping in touch with the subject. Seventeen years of giving advice and hearing from others in the
https://www.pedelecs.co.uk/forum/, since becoming the first ever forum member in October 2006. All the knowledge gained strongly indicates that the assistance must be adequate for average people and not just fit cyclists, leaving the safety aspect to the very sensible 15.5mph assist speed limit."
"A common method of an assist system applying power is by torque sensing, giving a multiple of the power the cyclist puts in. Unfortunately that once again disadvantages the less able while advantaging the very able, the opposite of the purpose of an assist system. Providing a throttle to enable enough assistance on demand when needed overcomes that problem for the less able. The other common system on ebikes is cadence sensing, switching on the power just by rotating the pedals. That has the unfortunate consequence of applying more power than necessary at times, such as in crowded slow moving traffic, meaning there are safety implications which throttle control avoids."
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