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What's the likely efficiency of pedal power capture in 'normal' usage? I'd guess (and it really would be a guess) around 80% pedal input power to electric output power, another 10% loss going into then out of the battery, and finally 80% at best electrical->mechanical power in the motor. If the...

Most hub motors are geared internally. There are a few direct drive motors around, but the lack of gearing generally makes them fairly inefficient except at high speed, and unsuitable for hill climbing. I don't know the 'typical' ratio in a geared hub motor, maybe one of the experts will give...

Ours were https://www.amazon.co.uk/gp/product/B087BT4HQP/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1, £13.99 a pair (we only use one) They wobble a bit, but not as much as I feared before buying them. I think it's the length of the stem rather than the flexibility that gives the wobble. It...

We've got similar ones to the ones billyboya references in the very first post. https://www.ebay.co.uk/itm/225340653950 They are very easy to tuck away and then reset. As we lean the tandem against the garage wall to park we need to tuck the right mirror away after every ride (2 seconds) and...

Any wing mirrors that don't stick out won't give a good view of what is behind. What matters for a good view is what position the mirrors are at, it doesn't make any difference how they are mounted to get them to that position. (The mount does make a difference to how stable the view is.) One...

You need to say what you want it for; 5 minute rides to the shop or hard offroad mountain bike rides. How fit are you? How much do you want to spend?

If you post a photo of two of the battery, especially the connectors, someone may be able to identify it. It may well be a fairly standard battery (though 24v is less common now). I've heard good things about eBike batteries mentioned above, but if there is a stock battery available it is...

Welcome and enjoy your bike. I hope you don't get any problems you need to ask about, but tell us anyway how you like your bike.

A friend was pushed off his (non-e) bike into a London canal some time ago. The bike was stolen; and the canal didn't help the laptop in his backpack. Partly his own fault, he was on the phone to our son at the time so maybe not concentrating and as in control as he should have been. Our son got...

It certainly looks as if the spokes have had a significant knock of some sort, and I agree with the comments that its best to replace them. But I can see how some bad forces on the wheel could bend the spokes fairly evenly; leaving the wheel reasonably concentric and true. Removing a very...

Far from a complete solution, but I think it would help if energy companies were required to make their prepayment meters charge at the lowest of their standard rates.

Usually twist grips for eg gears rotate on the part away from the edges of the handlebars, and the end part of the grip is fixed rigid to the handlebar. I'd guess the same would be true of most twist throttles. but maybe not. If it is it's that fixed grip part that needs the end cut to access...

We've got one similar to the one billyboya referenced in the first post. It was quite awkward to fit it: riser bars with a significant sweep back means it has to be attached on a slightly bendy bit of the bars. Given that, it is remarkably stable. The glass is quite small and is maybe too...

We still have a strong memory of 'Glasgow traffic lights' as we call them from when we lived there many years ago. They seemed to work on a backwards logic. If they saw a car coming they would turn the lights red so it had to stop. They wouldn't go green again until a car came on the crossing...

I don't know about that particular one, but several head units have their own internal batteries and might behave like that as that battery got low.

A conversion is less attractive than a bike made as electric, especially with a battered base bike. We've been lucky so far with fairly basic locks. It obviously depends where you lock it, and when, and even how regularly. I think the lock on our HL style battery would be a few seconds to pick...

Hub gear back wheels can be even worse. We've used Gaadi, very good. They seem to be fat for their nominal width; I'd go for one size down in future.

Another vote for late April to mid May to avoid the midges. Though I think they have got earlier with global warming. And a thank you for all the posts and photos.

It isn't illegal to sell them; it is just illegal to ride them except under various quite rigid limitations. If a bike with a throttle is old enough it can be legal (as long as it satisfies the other criteria), and others can be certified as Nealh said above. he said if a policeman saw you he...

Sometimes threads on this forum go quite a long way off-topic.