I agree Trex, for commuting you could do a DIY conversion of a bike for about £800 or there about with full suspension - see Cyclezee latest blog posting.

 

Keep up Colin, that was last week;)

Clear outline of the BF mid drive product line, should be able to get a hard-copy at next weeks eurobike

[ATTACH]6648.vB[/ATTACH]

Clear outline of the BF mid drive product line, should be able to get a hard-copy at next weeks eurobike

[ATTACH=CONFIG]6648[/ATTACH]

 

Hi t3sla,

 

Thanks, interesting find - internal sine wave controller and more crank wheel options - I assume these are future developments - getting better all the time.

 

Is it possible for you to point us to your source of that information?

Keep up Colin, that was last week;)

 

Just pointing out the possibilities John, I thought I would mention it as it did not appear on the forum.

 

I like the idea if you do not like the finished bike you can easily transfer it over to another and reinstate the old one back to original.

Hi I have ordered A 48 volt 500 watt version for testing from Bafang we will limit to 22MPH My only fear is how long the chain and gears will last

 

we will give the kit to one off my customers who destroys anything he rides

 

He has had our new 500 watt CST motor for 4 months running 48 volts with 20 amp controller limited to 22MPH NO problems We call that our Baby kit

 

 

The mid drive Kit will be with a 48 volt 10AH battery with optional 15 AH and 20AH battery

 

 

Frank

Hi t3sla,

 

Thanks, interesting find - internal sine wave controller and more crank wheel options - I assume these are future developments - getting better all the time.

 

Is it possible for you to point us to your source of that information?

 

From the horse's mouth, specifically the '14 product catalog.

 

The unit has always had a sine wave controller (the key to its relatively silent operation)

 

Annoyingly the information provided by most B2C online traders isn't clear and this chart clarifies what's currently on offer from bafang.

 

I'll be really excited to watch this product mature and gain increased functionality (torque sensing)

 

Also thanks to to the user who posted the output dyno results, interesting read :thumbup:

I guess that 100 Nm torque is at the crank, which has a diameter of about 10 inches, so torque at the back wheel would be about 29 Nm at the back wheel in first gear with 44/34T gearing.

Clear outline of the BF mid drive product line, should be able to get a hard-copy at next weeks eurobike

[ATTACH=CONFIG]6648[/ATTACH]

 

 

I hope you can post here anything you can find out at Eurobike.

 

Thanks, shemozzle999

I subscribe myself to this thread.

Somebody on ES has got hold of the 750w 48v version, and in a couple of weeks he'll have some for sale. He showed a picture of the BBS02 with stamping that said 48v 20A 500w

Endless-sphere.com • View topic - New Bafang Crank-drives

Hi

 

 

 

 

We will have Available in 2 months the 48 volt 500 watt Bafang crank drive kit With a 48 volt 10AH battery with it Fitted in our Kube Battery weight 4.5 Kilos in mounting case

 

Price with 10AH 48 volt li-ion battery £995

 

Price with 15A battery 48 volt Li-ion £1295

 

We also offer a fitting service £200

 

Buy your bike online have it delivered to us for conversion

 

we are working on next years range

 

mid crank drive 500 watts 48 volts

 

Geard 500 watt CST rear Motor 48 volts

 

3,000 watt direct direct drive rear motor 66 volt

 

 

we dont do 36 volts to under powered wast off Time look at the big players all going 48 volts

 

 

 

 

Frank

...

 

we dont do 36 volts to under powered wast off Time look at the big players all going 48 volts

 

Frank

 

Which ones of the big boys are you talking about?

Which ones of the big boys are you talking about?

 

Perhaps Frank is referring to those with a high BMI score:eek:

Hi Bionx see the Dt xl and rrxl

 

 

Batteries

 

Panasonic 47 volt

 

http://www.ktm-bikes.at/e-bike/e-bike/erace-p.php

 

They have realised 48 volts = GRUNT

 

 

Frank

Edited September 5, 201312 yr by banbury frank

Bionx Battery DT XL or RR XL: Li-Ion / 48 V / 8.8 Ah / 423 Wh, eRace 650 P: also 48V, 8,8Ah.

 

About the same 'grunt' as 36V 15AH.

 

The 47V Panasonic motor is something else, that's progress.

we dont do 36 volts to under powered wast off Time look at the big players all going 48 volts

 

Nonsense Frank - unless you're 20 stone or want to cruise around on a moped without pedaling then maybe ! Even with all the hills round here I don't pull more than about 350-500W most of the time - only up a >15% slope would I pull 700-1kw. Over 1.2kW acceleration is a waste of battery for an average sized rider. imho !

Edited September 5, 201312 yr by 103Alex1

Frank is obviously going to supply 3kw kits - but is there any donor bike that can use this kind of power safely?

Hi

 

been selling 60 volt 2500 watt bikes for 5 years now using Diamondback Bikes NEVER had a problem and the batteries 16 AH lipo4 weight was 14 kilos range 50 miles NO pedalling top sped 43 MPH

 

 

Before that 60 volt 20AH lead acid batteries same bike 35 kilos off batteries

 

AND trex Get you facts right the AH off a battery has nothing to do with GRUNT only range if you point a 36 volt bike at a hill my 48 volt will get to the top way before you 36 volt

 

Frank

Re voltage, maybe you should go to the voltages that endless sphere uses use, ie 72 volt to over 100 volt and not "play" at a puny 48 volts.

These kind of totally illegal (by massive margins) promotions by sellers do make me wonder if the recent thread regarding the promotion of illegal bikes etc. was perhaps correct at least to some degree.

3 kw is not a Pedelec it is a motor bike.

Hi

 

been selling 60 volt 2500 watt bikes for 5 years now using Diamondback Bikes NEVER had a problem and the batteries 16 AH lipo4 weight was 14 kilos range 50 miles NO pedalling top sped 43 MPH

 

 

Before that 60 volt 20AH lead acid batteries same bike 35 kilos off batteries

 

AND trex Get you facts right the AH off a battery has nothing to do with GRUNT only range if you point a 36 volt bike at a hill my 48 volt will get to the top way before you 36 volt

 

Frank

 

... and a 72V bike will get there even faster no doubt. But the point is that there's a balance between speed and power on a bicycle for it to feel in any way natural. It's a matter of individual taste. If I'm not pedalling I'd far rather sit on a comfy moped than a bike saddle cruising at 43mph !

 

Most of the time I turn my power down a bit because I don't like feeling as if there's someone pushing me forcefully from behind. It doesn't make the ride feel especially pleasant and definitely stops feeling like cycling much. On anything but the very steepest slopes this is the case on full throttle - and there are only 2-3 hills steep enough to demand full throttle an any ride for me. Speed-wise I personally don't want to cruise at 30mph - it gets cold over a protracted period aside from anything else and you start looking for a pair of goggles to stop your eyes running on account of the wind. Would rather save it for a few downhills. There's no motor power contributing there and having cracked how to hit 48.2mph this afternoon on a decent steep 0.6mile stretch I know all I have to do is fit a set of regular tyres to break 50 if I want a bit of a buzz.

 

If you're already taking very steep hills at 15mph riding naturally it does beg the question do you really need or want to buy a juice-guzzler to make that 18mph for the 5 minutes of the hour you're riding up it ? It's not a rhetorical question just a question. I personally feel on the limit of 'switch to moped' territory at 36V. Think it's something you gradually decide where your preferences lie.... but faster and more powerful doesn't always feel better.

Edited September 5, 201312 yr by 103Alex1

so Frank, if two of your bikes have a race to the top of a hill, one having BBS02 and the other, a 3kw beast.

Whih one will win?

Somebody on ES has got hold of the 750w 48v version, and in a couple of weeks he'll have some for sale. He showed a picture of the BBS02 with stamping that said 48v 20A 500w

Endless-sphere.com • View topic - New Bafang Crank-drives

 

I think the 750W version will be a BBS-01, the photo you mentioned was posted by another member nippynoo showing a BBS-02 unit which has a "coaster brake function" ?, he is also a Pedelec member who was a tester in that UK grant testing program.

 

He appears to be having a problem with this unit staying firmly clamped to the bottom bracket and is suggesting it should be loctited to it. I assume this has something to do with the coaster brake operation.

 

I hope he will report here what the problems are and where he sourced it so that others can avoid it.

Edited September 6, 201312 yr by shemozzle999

the BBS01 motor being heavy, tends to droop. I tied mine to the downtube.

I think the 750W version will be a BBS-01, the photo you mentioned was posted by another member nippynoo showing a BBS-02 unit which has a "coaster brake function" ?, he is also a Pedelec member who was a tester in that UK grant testing program.

 

He appears to be having a problem with this unit staying firmly clamped to the bottom bracket and is suggesting it should be loctited to it. I assume this has something to do with the coaster brake operation.

 

I hope he will report here what the problems are and where he sourced it so that others can avoid it.

From what I read, Nippynoo has never fitted one. He was going on the opinion of his local bicycle mechanic, who maybe has never fitted one either. Those that had fitted them dismissed that as being a potential problem.

 

The coaster brake version needs to make the chain go backwards by back-pedalling. I'd guess that the only difference would be in the way the chain-wheel free-wheels. The motor and main drive will be the same

I can confirm it's rock steady, the BB nuts have 4 ridges, you can always install the inner nut with the ridges against the frame, the ridges will key into the frame but it will damage your paint.