Haibike sDuro Yamaha powered 2015 eBike range revealed!

[RobF]

Dragging this back on topic, I see the Yamaha system has only three assist levels.

That's one or two too few for me.

If I imagine a Bosch bike with only three levels, the difference between them would be too great for general riding.

Might be OK for extreme mountain biking where the rider is pulsing the pedals and spending most of his time trying to pick lines and balance the bike.

But the Yamaha system is fitted to trekking bikes as well.

 

[Martin@e-bikeshop]

Hi Rob,

I found it to not be a problem, both on and off road..
Heard many say that Eco mode on Bosch does next to nothing before. Although I do disagree with this as I use Eco quite often.

The 3 modes are simple.
Lets call it 4 modes of course including Off

Probably worth giving it a bash first rather than shoot it down.
The modes offer different support to the Bosch.

Martin

 

[Gubbins]

When I get a new bike I usually sell my old one on eBay as most bike shops don't trade and gauge the worth of mine by what's actually being sold on eBay. I have been looking for a while and cant find anything to compare so how can I find out what mine is worth?

 

[RobF]

Hi Rob,

I found it to not be a problem, both on and off road..
Heard many say that Eco mode on Bosch does next to nothing before. Although I do disagree with this as I use Eco quite often.

The 3 modes are simple.
Lets call it 4 modes of course including Off

Probably worth giving it a bash first rather than shoot it down.
The modes offer different support to the Bosch.

Martin

My remark was hardly shooting something down, and it's only a ruddy bike, no children were harmed in the making of my post.

Touchy retailers aside, the fact remains only three levels of assist looks a bit limiting to me for trekking/road use.

Apart from anything else, three levels will limit the opportunities for battery management.

I doubt the assist system is so different from the Bosch, which I think could do with an extra level.

Bosch's use of percentage assistance is confusing, but if we talk about amount of available grunt from the motor, it would seem sensible to me to offer 20 per cent, 40 per cent, 60 per cent , 80 per cent and 100 per cent.

 

[flecc]

I think personal peferences come into it Rob, I hate lots of power level switching seeing it as a nuisance, it is only a few watts we have anyway. Standard and High is all I want at most.

Over the years three levels have been the most common on crank drives, though earlier ones only had two. Most of the motors with the higher number of switched power levels have been very recent and I'm not sure the demand for that is widespread yet.
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[Gubbins]

I think personal peferences come into it Rob, I hate lots of power level switching seeing it as a nuisance, it is only a few watts we have anyway. Standard and High is all I want at most.

Over the years three levels have been the most common on crank drives, though earlier ones only had two. Most of the motors with the higher number of switched power levels have been very recent and I'm not sure the demand for that is widespread yet.
.

Variable would be on my list.....

 

[flecc]

Variable would be on my list.....

That would be a torque sensor or twistgrip then!
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[Gubbins]

That would be a torque sensor or twistgrip then!
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Please don't confuse me with all you technically knowledgeable people who post on here. Whilst I enjoy reading what you post a lot of it goes over my head
I know I don't want a twist grip, and the words "torque sensor" are just words.. A sensor that senses torque?
I have never understood the difference between torque and power. Except when I had a diesel turbo car "chipped" and got a supposedly 40% increase in torque.... Well I definitely noticed that!
I was thinking more in the lines of.. Instead of moving up the modes in 4 jumps, but in smaller increments.

 

[flecc]

Sorry Phill, understood now. A torque sensor on e-bikes is really a pressure sensor that measures the pedal force you are putting in. On e-bikes with them, pedalling harder usually increases the power pro-rata, so a continuous power gradient rather than steps.

The nearest I know to what you want is the eZee bikes EAF control switch, it has I think nine equal power increase steps.
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