Hello newbie alert

[maxb]

Hi AlI I have just joined the forum I don't have myself a Pedelec yet but I am hoping with a bit help from the mighty collective knowledge I will be steered the correct direction for my planned conversion of my trusty Trek T900 tandem. I have called round a few vendors of conversion kits and non seemed that keen so I think the best course of action will be A Taylor made DIY conversion.

Cheers Max

 

[soundwave]

 

[maxb]

Looks sweet!!
I wonder how the mid drive system works with the stoker possibly controlling
the pedal power, I know in my case I am putting in 80% of the power from the front.

 

[soundwave]

no idea tbh but another one here you can buy not cheap tho.
https://www.e-bikeshop.co.uk/Electric-Bikes-UK-Dealer/Gepida-Rodanus-Tandem-Bosch-Electric-Bike

 

[maxb]

I was looking at that, it looks real nice but looking at the sizing I think it would to big for my wife who is 4ft 11" my current tandem has a 14.5 inch rear frame which is just right for her this is why I think a DIY conversion is the only real option, I am more than happy to be wrong as I would quite like a purpose built e-tandem.

Max

 

[Nealh]

Hello maxb, Fit a BBS01 kit to the front crank to be in control there is no reason to fit it to the rear. However the bbs does in most cases need some reprogramming to get the best out of them as the factory settings can be very conservatively set in my case power was only set to 1/5th of its capability. Also which part of Engalnd.
BBS takes about 30mins to fit however to tidy things up a bit a few more hrs for the wiring etc.
With a bbs you can only have one chain wheel so you need to choose the right one for your needs.

 

[maxb]

Hello maxb, Fit a BBS01 kit to the front crank to be in control there is no reason to fit it to the rear. However the bbs does in most cases need some reprogramming to get the best out of them as the factory settings can be very conservatively set in my case power was only set to 1/5th of its capability. Also which part of Engalnd.

Hi,
I'm in Hastings.

I do quite like the idea of a BBS01 but I thought I could not fit one on the front as my chain that drives the rear is on the left side.??

Max

http://trek.scene7.com/is/image/TrekBicycleProducts/1244000_2016_A_1_T_900?wid=3000&hei=2454&fmt=jpg&qlt=50,1&op_usm=0,0,0,0&iccEmbed=0&cache=on,on&bgc=247,247,247

 

[Nealh]

Can the rear drive not be retrofiited so all is on the rhs ?
Not far from Brighton, Brightonebikes might be avble to help you with a conversion for bbs.

 

[anotherkiwi]

A Bafang BPM motor with a 17 Amp controller would be a good fit for that.

Who changes the gears? You can mount a Bafang BBS. Your chain goes from the front to the rear chainwheel. You decide your ratio I would suggest 48 tooth chainwheel on the bafang to 48 chainwheel on the back and the drive chain from the 38 to the cassette and you don't change gears on the chainwheel any more, just the 8 speeds on the cassette.

The assistance levels of the motor replace the front three speeds.

 

[maxb]

Can the rear drive not be retrofiited so all is on the rhs ?
Not far from Brighton, Brightonebikes might be avble to help you with a conversion for bbs.

Hi Nealh
I think it's possible to change the drive side but I think it would mean a group set change which is a fairly costly, it would be worth considering if the mid drive would work out better than A hub motor.

Max

 

[maxb]

A Bafang BPM motor with a 17 Amp controller would be a good fit for that.

Who changes the gears? You can mount a Bafang BBS. Your chain goes from the front to the rear chainwheel. You decide your ratio I would suggest 48 tooth chainwheel on the bafang to 48 chainwheel on the back and the drive chain from the 38 to the cassette and you don't change gears on the chainwheel any more, just the 8 speeds on the cassette.

The assistance levels of the motor replace the front three speeds.

 

[maxb]

Hi
The Captain ( person on the front) has all the controls.
So the Bafang BBS can drive from the left ?
How would the bike ride when not under power? I do like to pedal ( wife not so much ) I would plan to only plan to use the motor for long hills and strong head windows.
Max