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That particular challenge is readily solved with a quality hub gear and Gates Carbon belt drive. It brings other design restrains undoubtedly, some though, could be seen by owners as advantages in their own right, but nevertheless design restraints. Without access to try several demonstrators of...

I am not convinced the lighting by dynamo issue makes a lot of sense where an e- bike carries, in a relative sense to the power required for lighting, a "gert great" electrical energy storage battery? I know the Germans, so probably elsewhere on the continent were saddled with a legacy issue...

A "medical condition", hints it might be prudent to consider if you need to get a mirror of some sort. Mine is helmet mounted as bar mounted would screw up storing and transporting the bike in my specific case. A home made clone of THIS For panniers I have a pair of rear fitting Ortlieb BACK...

That is very true in that the frame must be designed to fit a belt, as unlike a chain it can't be broken and rejoined back into a loop. Effectively, it requires the breaking of the frame's rear triangle instead. Then there is the high lateral stiffness that has to be there for the belt as its...

You might get a bit extra for a replacement battery though ;)

First of all what I clearly was discussing was efficiency in respect to speed of the motor, and how this impacts on road speeds depending on gearing. Be very sure I am not “assuming that electric motors are similar in any way to motors that burn say petrol or diesel, especially with regard to...

Is there not grounds to believe our DC motor's efficiency as others, is linked to their operating rpm? [Logic has it that any motor efficiency curve must diminish towards its lower revs, as stalled the efficiency has to be zero, power goes in but none comes out.] Thus an installation that...

Andy, please have the courtesy to only credit me with views I have actually expressed in posts.

Well, as it was a machine I was using it precisely in that context, as I do in discussing engineering matters, "(of a machine, system, or technique) developed to a high degree of complexity."

Are there Chinese bikes with Chinese kit, let alone the quoted £900 example, that are technically as sophisticated as drives from Bosch, Yamaha, Shimano etc? By that bikes with drive systems with the algorithms to manage true "power assistance" as opposed to electrically powered bikes where the...

Plus we have one with the ill regarded Impluse 2 crank drive, not one of the Bosch range. Had it from new May 2016, it is the step through Agattu, with Gates belt and Nexus 8 gearing. They are certainly a nicely built bike using what appear as quality cycling components. I read the specific...

Probably because they in their choice of bike want a cycling experience with the level of sophistication, that can't be achieved without a degree of complication?

Retrofitting a belt drive is exceedingly challenged for all but those with frame re-engineering skills and facilities, as you can't break the belt to thread through the standard configuration of the stays. Basically the bike frame has to be designed for use of the belt. Chains can be split and...

Yes, I have one circa 40 years old on a Dawes Kingpin folder, never a problem and seen no more than a few drops of oil in the hub each year. Just I don't ask of it anything like the rides, or terrains I do on our road bikes or Kalkhoff Agattu Impulse. Accept the SA versions of that vintage were...

Or they also recommend basing it on use, extending to every 3000 miles for the lighter user.

Okay, you no one would not have sold me a three speeder these days either.

True, the belt, a hub gear and a frame facilitating removal of the belt add cost compared to at least bikes with budget dérailleur gears, but IMO the shortage of the former in the UK is in part, our take on cycling. Let me put it this way, as a generalisation the UK cyclist is a recreational...

Oh, then probably don't look too deeply into the sublime Rohloff 14 speeder, with or without the electrical shift. Link; Rohloff There are some videos available out there to really get into the operating details!!! ;)

The Raleigh Centros range includes belt driven Nexus hub models. Here is a link: CENTROS RANGE I went the Gates belt combined with Nexus 8 speed hub geared back in 2016 for my wife, but now I am a very regular user of it. That is a Kalkhoff Agattu of that vintage, but unlike today features...

I had little doubt he did, I did apologise and wink.