Is this the best value new bike,release soon?

[Kudoscycles]

Is the derailleur system up to it?

I ask partly because in another thread KudosDave posted: "I cannot find anything wrong with a good quality derailleur system(Alivio or Deore) provided that you are not trying to feed a crank drive motor system through it."

This KTM bike has Alivio derailleurs by the look of it.

Rob...all the KTM bikes with derailleur gears have generation 2 Bosch system which reduces the power during highly loaded gear changes so as to allow a relatively smooth shift.
I do remember being told that Bosch and Shimano had at one time a quality problem that the Bosch crank system caused failure of the Nexus hub gears. I questioned a Shimano engineer at Eurobike about this and he advised that a combination of Generation 2 Bosch and all the Nexus hub gears being upgraded to Alfine spec had overcome the problem.
KudosDave

 

[RobF]

I agree the power in a derailleur bike ought to be along the top line of the chain.

But this doesn't explain why derailleurs exploded when linked to clonky Chinese crank drives.

Perhaps, as KudosDave says, it's all down to the change.

My faith in any 'shift assist' system is limited, so I think mechanical sympathy from the rider is what's called for.

I don't see that as a product weakness in this case, any mechanical system needs proper operation.

Another point, I am not trying to flog anything on here, so it matters not to me what folk think of any bike or drive system.

I have two Bosch bikes, so far, so good, but it is increasingly apparent to me that all ebikes are compromised in one way or another, which in turn requires compromises from the rider.

 

[trex]

...
But we are both naughty boys talking about this because Trex will be along in 10 mins to tell us both why a crank drive is best,flak hats back on!!!
KudosDave

the derailleur is spring loaded, non load bearing, the chain just runs through it.
The noise that can some times be heard when changing gear comes from the chain straddling two rear cogs, when you change gear while the chain is still under load.
There is therefore no mechanical reason why the derailleur should be damaged by gear change. So I am afraid to say that kudosdave spreads fear about derailleurs for no good reason.
Using a hub gear avoids the chain straddling two cogs but if the chain is still under load, the hub gear may get sticky, even bangs.
Most crank drives now have gear sensors that reduce or cut the power on gear change. The Bafang BBS01 and BBS02 have very sophisticated controllers that stop the motor vey quickly when you stop pedalling, therefore practically eliminate the chain banging, Woosh will have their gear sensor that you can retro-fit to your CD bikes if you feel it's needed. You can test ride both the Bafang BBS01 and the Woosh Sport CD fitted with gear sensor at Redbridge this Sunday.

 

[oldtom]

My faith in any 'shift assist' system is limited, so I think mechanical sympathy from the rider is what's called for.

Abolutely!

It astonishes me at times when I see people riding bikes with saddle heights so low that they cannot pedal properly. Usually, such people claim they like to be able to put their feet on the ground while remaining seated.

When people go from childhood to adulthood, never having learned how to ride a bike properly, it's almost certain that those same people will have no understanding of other things bicycle. I find it incredible that some adults struggle to mend punctures, totally ignore any kind of chain lubrication and complain of difficult gear changing through a complete lack of empathy with anything mechanical.

It's the same syndrome as we read about not long ago when there was a spate of cycling deaths on the streets of London. Those who choose to ride up the nearside of large vehicles at junctions where a vehicle might be turning left regardless of signal, display fatal stupidity and a complete disregard for the potential dangers inherent in urban cycling. That is because of a lack of cycling knowledge or education.

Compulsory cycling proficiency and testing for everyone before school-leaving age would go a long way to eradicating that particular problem. It would also help general road safety if obtaining a driving licence were contingent upon a cycling proficiency/road safety examination.

Tom