Converting bike with rollerbrakes

[erik_bp]

Hi,

I'm in the situation that I finally want to make the jump into the (hopefully)wonderful world of electric bikes. I want to convert my existing bike, which has Shimano roller brakes. I've been looking at the following three motors:

https://bmsbattery.com/ebike-kit/437-q85-36v250w-roller-brake-front-driving-hub-motor-ebike-kit.html

http://www.8funmotor.com/product.asp?id=1

http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2011-92-K47B.8RWSV

Does any of you guys have any experience with mentioned motors and would you recommend either of them? Also I took some measurements of my bike and I'm pretty sure that the motors should fit, do you agree?:

Total spacing: 105mm.

I'm also considering buying the following:

https://bmsbattery.com/ebike-kit/546-s06s-250w-torque-simulation-sine-wave-controller-ebike-kit.html?search_query=torque+simulation&results=15

https://bmsbattery.com/ebike-parts/504-pas-pulse-padel-assistant-sensor-with-12-pcs-magnets-parts.html

https://bmsbattery.com/ebike-kit/670-s-lcd3-lcd-meter-for-s-series-controlers-ebike-kit.html

https://bmsbattery.com/ebike-parts/52-brake-grip-parts.html

Do I need anything else, except for a battery?

Best regards,
Erik

 

[Deleted member 4366]

Why don't you fit a rear or mid motor? What bike is it?

 

[erik_bp]

Why don't you fit a rear or mid motor? What bike is it?

It is a MBK Concept:

http://mbk-cykler.dk/portfolio-item/concept-7-3/

I'm not sure if the frame is made by MBK or if it is some kind of generic frame. The bike has 7 internal gears and that is why I don't want a rear hub motor. Regarding mid drive motors, I have been considering the Bafang BBS02. Technically is seems like a good solution, but due to my vanity I prefer a front hub motor.

Are you aware of any mid drive motors, which are more discrete but not crazy expensive like the Vivax Assist:

http://www.vivax-assist.com/en/produkte/vivax-assist-4-0/vivax-assist_4-0.html

 

[Deleted member 4366]

Rather than mess about with drum brakes, another option would be to get some better disc brake used forks from Ebay or wherever and then you can choose whatever motor you want.

 

[erik_bp]

Rather than mess about with drum brakes, another option would be to get some better disc brake used forks from Ebay or wherever and then you can choose whatever motor you want.

For time being I would like to keep the standard fork and fiddle with the roller brakes as a consequence. I have definitely noted your advice. If I get hooked on electric bikes, I think that I will invest in a new bike where a rear hub motor and disc brakes is an option.

How about the extra parts I have selected? Are they fine or do i need something extra?

 

[mechaniker]

Hi Erik,

i have a Motor for rollerbrake in my home.
Its new and unused for 100mm forks with rollerbrake and the weigth is 2kg
Diameter for the spokes is 120mm
It has 36v 250watt
Brand is shengyi:
http://www.syimotor.com/products_detail/&productId=81a09d70-96ba-49b5-8a34-48e76ac5020e.html

if you want you can have it for 80Euro but no waranty and no take back
shipping would be 15euro

I bought this motor last year in china for my selfinterest but I lost the interest on that motor and brought him to basement ;-)