More on Shimano's new STEPS mid-motor e-system

[flecc]

An information summary on this link

More detailed information if wanted in Martins thread on this link

 

[trex]

is it going to be this one?

datasheet:

http://endless-sphere.com/forums/download/file.php?id=116632&sid=43bc78ff0719eb674df49cd5a14ade42

 

[flecc]

It may well be, Martin's thread may help identify it as that.

 

[trex]

perfect combination - and saving some weight.
It has the potential of giving Bosch a serious headache.
If only Shimano could shrink it down to the size of an orange.

 

[Electrifying Cycles]

Perhaps it could ease Bosch's supply issue

 

[flecc]

Perhaps it could ease Bosch's supply issue

Possibly, though I think Bosch might be ungrateful.

 

[Martin@e-bikeshop]

perfect combination - and saving some weight.
It has the potential of giving Bosch a serious headache.
If only Shimano could shrink it down to the size of an orange.

True Trex..
I am all ears for the new Shimnao system. Im hoping it will be great like many of their components.
But on the specs already released, the Bosch beats it in Nm torque and charge time! Thats the only 2 real bits of info they have released. Will have to see in due course. Not that I am a biased Bosch fan at all I was a Panasonic man at heart. But the Germans may have converted me over the last year or so.

I think the system will be great as long as they don't make it mandatory to couple it with some of their higher end groupsets to manufacturers. As this could drive the price up significantly to the end user.

Lets wait for more info and see what happens, they make some real good quality components so hopefully they have nailed it 'this time round'!

Regards
Martin

 

[Deleted member 4366]

I wouldn't worry too much about the torque figure just yet. They didn't say where the torque is measured, so you might not be comparing like with like.

3.1 kg seems pretty good, but that implies that there's not a lot of copper in the motor. It looks like an in-runner motor with an epicyclic gear reduction system about the size of a Q100 (by approximate scaling), which is also an in-runner, so I'd expect about the same power. A Q100 is 2.1 kg, so that would leave 1kg for the gearbox and final drive, which seems about right for a three-speed gearbox.

The patent mentions a plurality of gears, but somewhere in brackets it mentioned 3-speed, so does that mean that you'll need rear gears as well or will they have different heavier versions with more ratios?

One other thing I noticed is that they've used Hollowtech type cranks on splines rather than the square taper ones on the compeditors motors.

 

[flecc]

Hopefully they'll have versions with more gears following. When they introduced their automatic changing hub gear system they started with 3 speed only, but once proven introduced versions with more gears.

 

[Martin@e-bikeshop]

d8veh,
What happened to your signature? I liked the old one it suited you

Martin

 

[Deleted member 4366]

d8veh,
What happened to your signature? I liked the old one it suited you

Martin

It lasted three years and then wore out.

 

[Martin@e-bikeshop]

It lasted three years and then wore out.

Fair enough.. Thought this would suit you -
I wanted to study hard but there is no NOBEL Prize in Engineering!

Martin