mvly wrote:I think those are all the comments I have for the ebike itself. The rest looks rock solid.
EDIT: a few more:
1) Get Tekro E-Hydraulic ebrakes. Still Hydraulic, but have built in reed sensor to engage regen. I think the button is a pretty crappy solution because when you want to brake you don't press a button. Also you would still have to press the brake lever if you do end up using it. To much of a hassle in my opinion. The other option might have beefier hydraulic brakes, but I would stick with the Tektro Hydraulics ebrakes for now
2) I would try to do something other than HK Lipo. I notice in your picture you use them. They are cheap and you can custom your battery size easily, but I don't know if it's for everyone. Also keep in mind you are dealing with HobbyKing (HK). They can screw you pretty easily. Also their stuff tend not to last as long so I would expect high servicing cost for you. I don't know of any legit ebike company selling their ebike with HK lipo. Too much of a fire risk factor for them apparently. The stealth Bomber is LiFePo4. Outrider is Li-Mn or safe Lipo. This one might be hard for you to solve because it's pretty difficult to get legitimate, low cost, long lasting, safe, and reliable Lithium battery. Good luck on this. Maybe you can do bulk buy to keep cost in check.
3) Lyen controllers are great starter controller. For more reliability and longevity, I would go with Kelly. But again maybe you will be offering them as options already.
The big key here is to get it reliable. You don't want to spend all your money servicing these suckers! This usually means over-enginnering the ebike, which increase cost which means the only realistic way you can make money is to either: Sell it for high price OR do economy of scale and bring the cost down for the parts. Or do a little of both like what Tesla is doing with their Electric Car.
Good luck on the campaign. I am looking forward to see what the pricing structure will look like.
Thank you for your message!
1. We were thinking about different kind of brakes. The thing is to convert some kinetic energy (speed) into potential (electrical charge) we need some amount of time during regenerative braking. We cant transfer kinetik energy of the bike into potential due to couple of reasons and the most important one is because batteries are not able to store fast very big portion of energy. Thats why during fast or emergency braking using bike brakes only small fraction of energy actually will return to bike battery. Usually regenerative braking work well during relatively slow braking (long hills). For this ebike we will offer 3 types of brakes, wire disc brakes, hydraulic disc brakes, and something similar to Shimano Saint hydraulic brakes system*(high-end).
2. This type of batteries is used for our prototypes. As you mentioned they are not "idiotproof"

To our final versions we will use: 48V 20Ah LiFe battery, 72v 15AH LiFe A123 , 72V 24AH Life A123. All batteries will work with smart BMS.
3. We will offer different variants of controllers as well as motors for final products with Lyen and Kelly programable controllers. Many people who are new in ebike world dont look for 1kW+ bike , and for some people even 6kW is not enought

)
The important thing is that advanced ebikers would be able to order frame only, to build their own ebikes!
The stick in wheel here is taxes, delivery cost, documents.. We'll see..
Hope to get more comments from you fellows
