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Same chainring as mine. How puzzling. Wrong chain?

Not necessarily true. I have the FSA Megatooth on my Jam², which is a 1x12 Shimano rig. It's a custom part for Focus and not the stock FSA Megatooth. Which could well mean that the wrong part fell into the box at FSA and got fitted when no one noticed. That video does rather look like a...

Please bring along your punishment! Write out 1000 times long hand: "I must not lay my bike on its derailleur!"

So windy I thought you were going to have to pedal downhill! ?

If those are the Nobby Nic's that are non-folding rigid and cost you less than 20 quid then they are not tubeless ready. The tyre sealant will bleed through the sidewalls to such an extent that you'll see the weave pattern through the rubber wall. Once you've spent a couple of days getting them...

The other thing that will do it is to freewheel with cranks vertical rather than horizontal. That really makes the motor chatter. So much so that I seem to remember Bosch commenting the fact.

Why not ask Bosch directly by using the contact form on their website?

He's towing a horse a lot of the time!

The folks over on pedelforum.de seem to think it's to make the motor play nicely with the new Nyon display and that it's irrelevant for those of us mere mortals with Kiox and Purion kit.

Too true. Last Tuesday night was out in the forest on a club ride when the youngster trying for glory broke a spoke which somehow then went through the rim tape and tyre. I don't care what liquid you're using, that ain't gonna seal. I offered him the use of a tube to save him an hour's walk...

Not at all surprising. In this part of Spain none of the official Bosch dealers have the computer software or knowledge to do any upgrading. About all they can do is take a motor out and replace it. To upgrade our two Focus bikes was a 200 mile round trip to a dealer who had Trek branded Bosch...

Yes

In the local forest - lots of acacia thorns. Current tyres have been on the bike since mid-May and have done a couple of thousand kilometres. I leave the thorns in, which means there is a slight trace of liquid. Must be 4 dozen thorns in the rear, which have gone right through the tyre and...

I'd just like to add a bit to this. I converted a couple of non-TR Schwalbe tyres to tubeless some years ago. It took 2 days for the side walls to stop weeping sealant. They needed to be laid horizontally, turned every few hours and given a good shake. They wept and wept and wept. They did...

https://en.wikipedia.org/wiki/Form_factor

I agree with @simonk on this. However, if you are worried you need an extra boost of air, use a CO2 cartridge. I have had a couple of wheels where they wouldn't pump and one or two cartridges got the tyre to pop onto the rim when no amount of pumping would do it. The only thing to remember...

https://www.bosch-ebike.com/en/products/charger/

Or, if you want a longer ride up the Thames (40 miles), how about this one: https://www.wikiloc.com/mountain-biking-trails/thames-ride-up-to-staines-3026852

The bolts come as part of a set, which you identify from their colour on the drawing rather than a number.

Ah well, no problem. All the exploded diagrams and parts lists are on this page about halfway down in the tab called "Exploded Drawings".