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Not sure about the impact of a small front ring on chain/ring wear, but I agree it's unlikely to be possible to change the gearing from that end. The small front ring does give a neat high chainline with a hub gear. Even on the Rose with it's traditional big ring I've noticed the chain stays a...

My understanding is they are new units, but Bosch won't sell you one unless you can supply a broken one in return because they don't want people trying to fit the motor as a kit to a 'non-Bosch' bike.

Looks OK to me. The chain can slap against the chainstay when going over bumps, which is why some people fit a chainstay protector...

As posted by Flecc earlier, improved torque transmission - motorbikes use small front sprockets. Also it's almost impossible for the chain to jump off which is an intermittent problem on all bikes. The chain inevitably jumps to the inside and jams around the bottom bracket. Jamming is...

The rechargeable LED lights are very good these days, so you could get a rear to clip on to the seatpost and a front to clip on the handlebars. That should be sufficient, unless you are into year round hardcore commuting. Mudguards will, again, be the same as any mountain bike. Seatpost clip...

Fair enough, one can only speak as one finds. I think you've done a lot more bike and ebike miles than me, so you are probably a bit fitter than you give yourself credit for. I've just come back from a short ride and with this thread in mind, I tried the AVE unassisted for a little way. It...

But I bet you have sweaty palms after a track day in your RS8.

Nice bit of research from Trex, and I agree with his conclusion. A note of caution, a friend of the chief mechanic at my local bike shop bought something that looked similar. What turned up was a dreadful contraption with faults too numerous to list. The mechanic - as a favour - spent a...

As regards using the bike without power, I don't think it's a goer. There may be very little drag from the motor, but you are going straight from assisted cycling to ordinary cycling of what is now a very heavy bike - 20kg+. Fine if you have the fitness to do it, but a better plan is to use...

The load on the bearing is pathetically small in bearing terms - a wheel bearing on a car isn't much bigger. One might think Bosch would have an idea on what loading a bearing can take, and have had such knowledge for years. There is no need to use the customer as a test bed for bearing wear...

Bob, Don't worry about some of the working class heroes on here who simply cannot abide a product aimed at the premium end of the market. I want to see the widest possible choice, so I think it's great to see cheap Chinese kits developing all the time alongside higher end kits from the likes...

I lack your obvious electrical engineering qualifications, so cannot comment on the design of the motor. What I do have is two Bosch units which have performed correctly so far. These things are very hard to judge objectively, but given the large number of Bosch units in use, it's surprising...

Looks like replacement Bosch motors are available for about £500, so it's the same as the Panasonic. The Bosch is better in one respect, it can be pulled to pieces, although as we've heard spare parts are hard to source. http://rower.com.pl/download/bosh%20ebike.pdf

Nice to know someone is on near permanent watch for an opportunity to steal your goods. The answer usually lies close to home. I had a bike stolen from my garage a few years ago. The culprit was the next door neighbour's ne'er do well son who had seen me using the bike from his bedroom...

You have summed the job up correctly. To get a significantly better bicycle in a ready made ebike you would need to pay a lot more. The bike part of , say, a £1,750 ebike would be worth about £600 at retail prices.

Your bike looks like a cheap and cheerful one which would retail for around £200. You would get a similar quality bicycle if you bought a woosh, maybe something a bit nicer if you bought a Juicy. There's a lot to be said for converting your bike if you like it, it fits you, and it is...

When I was in Croxden Country I did the Manifold Trail. No humps, it's a former railway line and I was told it's standard rail gradient which is barely any climbs at all. Doable for almost anyone on a non-powered bike. There's a guy at the southern end who hires bikes for the day. He told me...

A single full discharge is often recommended, but after that charge as often as possible. The battery will work better and last longer if it is used higher up the capacity scale. No harm in running the battery low if you have to for a particular journey. I charge my bikes after each ride...

The user should not have to use engineering skills and a micrometer to obtain a spare part. The bearing should be available as a part number from Bosch. Warranty or not is irrelevant, although in this case I would expect to pay for the part. But in return, I would expect the part to readily...

It's a heavy bike to stop and as with all bikes it is the front brake that does most of the stopping. In other words, it needs to be up to the job. You can now get cable operated hydraulic discs - the cylinder is fixed to the calliper. Worth considering, no more messing about with adjustment...