Looking for Bosch bike reviews

[Artstu]

I've been looking to find a few reviews on the Bosch crank drive in action, I've come across a few here and there, but there doesn't seem to be much on here about them.

I'm also not finding many places in the UK that seem to be selling them? for sure I could just be looking in the wrong places.

This thread had a fair bit of info Endless-sphere.com • View topic - New Bosch drive system but not many bikes.

So I want a nice Bosch powered bike supplied by a dealer here in the UK for around £1600 please

 

[banbury frank]

Hi link for somebody with one

http://www.pedelecs.co.uk/forum/electric-bicycles/9050-ktm-cross-macina-bosch-arrives-4.html

Uk suppler £2800 WOW

Just e-bikes from Justebikes.co.uk | UK e-bike Sales | Electric bike sales and servicing

Frank

 

[eTim]

Here's a thread I started on the subject:

http://www.pedelecs.co.uk/forum/electric-bicycles/8658-haibike-xduro-fs-first-impressions.html

 

[eddieo]

Google Translate

lots of info on here....

Just in the door from over a month in Croati/Italy so will respond to this in the next day or two

 

[Artstu]

Interesting Eddie thanks, but guessing that isn't the thread you wanted to share?

Thanks Frank and Tim.

 

[james@justebikes.co.uk]

Hi ArtStu,
I'm sure you've worked out we can supply you with the full range of Bosch powered Haibikes. What you may not know is that Take Charge Bikes in Bath can now supply too. Call David on 01225 789568 to arrange a test ride.

Rgds,

James

 

[Artstu]

Anyone done this mod yet I wonder? for some reason I can't understand a word he's saying [video=youtube;ivu8gFTzHmY]http://www.youtube.com/watch?v=ivu8gFTzHmY[/video]

 

[kitchenman]

Whats that number plate all about 849 ZEP?

Just had someone translate for me. It IS a number plate. Cool! ... and its orange lettering which matches my Street Machine.. Gotta get one ... Bike Jewelry!

 

[flecc]

Whats that number plate all about 849 ZEP?

Possibly saying it needs to be registered because it exceeds the EU speed limits. The high speed/high power e-bike classes in Germany have to carry number plates.

 

[eTim]

Looks like an elaborate way of enabling/disabling the rear wheel sensor so that the bike will go faster. What's the fastest the bike will go?

Just a thought - would it be possible to vary the speed/assistance by creating a sliding detector on the rear stay so that the rear sensor will count faster or slower thereby varying the speed/assistance?

 

[eddieo]

Whats that number plate all about 849 ZEP?

Just had someone translate for me. It IS a number plate. Cool! ... and its orange lettering which matches my Street Machine.. Gotta get one ... Bike Jewelry!

He is saying that the modification he is about to show, which is switchable on and off, means it puts bike in S class requiring a number plate. Unfortunately my German speaking friend has started a new job last week and really under presure...I could get a translation otherwise.

Come on Google! how about a dubbing translation service!

In the next video they strip down the Bosch motor of a KTM Macina, the bike I had sob sob....

 

[eddieo]

Looks like an elaborate way of enabling/disabling the rear wheel sensor so that the bike will go faster. What's the fastest the bike will go?

Just a thought - would it be possible to vary the speed/assistance by creating a sliding detector on the rear stay so that the rear sensor will count faster or slower thereby varying the speed/assistance?

I understand that some have moved sensor to crank and increased the speed significantly. This looks better as you can switch it on or of. I would think 20 mph + easily, as motor has so much grunt...

more video here: http://www.youtube.com/user/MrEleagle

 

[Artstu]

I guess it must be possible to tell the unit you're running 20" wheels via programming, that should allow all the assistance you need when you're still on 27" wheels

Moving the sensor won't up and down the stay won't make any difference, it'll still see the magnet every revolution regardless of where it is on the stay, hence why they point it at the pedal.

edit, I think I have that the wrong way round don't I, we need to tell it we're on bigger wheels I think

 

[mike killay]

Looks like an elaborate way of enabling/disabling the rear wheel sensor so that the bike will go faster. What's the fastest the bike will go?

Just a thought - would it be possible to vary the speed/assistance by creating a sliding detector on the rear stay so that the rear sensor will count faster or slower thereby varying the speed/assistance?

I think it all depends upon what the sensor is reading. On the Tonaros it's a magnet that can easily be removed allowing the bike to go up to 18-19mph on the flat.
If on the Bosch it reads the spokes as they go past, sliding the sensor along will make no difference as the number of spokes going past per revolution will remain the same. What he seems to have done is make the sensor mobile so it can be turned to read the crank instead of the wheel. As the cranks are turning much slower than wheel, the controller that thinks it is reading the wheel is fooled into thinking that the bike is going much slower than it really is thus it continues to supply power.

 

[james@justebikes.co.uk]

Anyone done this mod yet I wonder? for some reason I can't understand a word he's saying [video=youtube;ivu8gFTzHmY]http://www.youtube.com/watch?v=ivu8gFTzHmY[/video]

Yes, and the Russians used a pencil!

 

[eddieo]

I played about with the spoke sensor and it made no difference...I think Mike probably right. but there are 3 sensors apparently.

"Three sensors to calculate speed, cadence and torque. This leads to the optimal motor support. By this technique no energy is wasted, what makes the Bosch drive very efficiently"

 

[Artstu]

Yes, and the Russians used a pencil!

Have you got a link? go on I know you're dying to share it with us

 

[hihihi]

As I understand german:
Yes, the sensor needs a magnet to pass by for it to register movement. In the video, at 8:40 he says that you could just snap a magnet onto the inner pedal axis because they're mostly made of steel. Or, for more security add a drop of hot glue.
And finally, at 11:08 you see the original spoke magnet slid down to oppose the new sensor position.

 

[mike killay]

As I understand german:
Yes, the sensor needs a magnet to pass by for it to register movement. In the video, at 8:40 he says that you could just snap a magnet onto the inner pedal axis because they're mostly made of steel. Or, for more security add a drop of hot glue.
And finally, at 11:08 you see the original spoke magnet slid down to oppose the new sensor position.

I didn't see it at first, but as you say, at 11.08 you can see achrome coloured magnet on the spoke. From what Eedieo says, simply removing this does not work, so obviously the controller needs some sort of time signal. By using the crank, the signal is much slower. His modification gives instant switching between the two modes.

 

[Tor Atle Lunde]

I played about with the spoke sensor and it made no difference...I think Mike probably right. but there are 3 sensors apparently.

"Three sensors to calculate speed, cadence and torque. This leads to the optimal motor support. By this technique no energy is wasted, what makes the Bosch drive very efficiently"

The cadence and torque sensors are probably inside the motor casing.

I wonder what the difference is between the 250W and 350W versions....someone will dissect and investigate for sure