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  1. M

    Mid-Drive 80100 : my project !

    Design is done, I'm going to start to buy commercial components. I finally decided to do the second stage with 2 belts HTD5M 20mm width. The torque starts to be awesome at this second stage if performing with peak 7000W. . . . Question : My bottom bracket is 68mm. If I add the 2 external...
  2. M

    Mid-Drive 80100 : my project !

    just bought that :twisted: .
  3. M

    Mid-Drive 80100 : my project !

    ...one more concept for folding bike 20" : . Java Folding Bike 451 . . ..and its mid drive C80100
  4. M

    LMX P2 : Freeride trials motorcycle frame development

    Thx for the infos guys ! Hope you will update and grow your product range and business. If you grow up with a second workshop, it's a good sign :wink: Last thing I would know, do you manufacture all your parts (I don't peak of commercial parts) ? or do you ask to contractors for specific...
  5. M

    LMX P2 : Freeride trials motorcycle frame development

    ...in Paris, you can easily pretend 80k€ as Engineer in an international company, with 10 years senority !! But what you do is most rewarding that any job !! One more time (as Daft Punk says) : CONGRATULATION. I would love create or integrate a compagny like yours, you are a example for me...
  6. M

    LMX P2 : Freeride trials motorcycle frame development

    ...bravo les Frenchies !! c'est pas mal du tout votre affaire :wink: . Congratulation from La Region Parisienne :mrgreen: .
  7. M

    Mid-Drive 80100 : my project !

    ..here is my Excel Sheet with all the parameters following my mid drive (ratio-wheel-kv-Volts-Km/h-eff) : . . Yellow : Enter the value Green : Results .
  8. M

    Mid-Drive 80100 : my project !

    ...let's talk my imagination for a powerfull and agressive 20" city bike, I like the idea :mrgreen: : . Java CL20 (406) . Connondale Hooligan . Java Freccia (451)
  9. M

    Mid-Drive 80100 : my project !

    Yes of course Dan, as I already wrote it before, I didn't find 3D model of freewheel and adapted crank... :mrgreen:
  10. M

    Mid-Drive 80100 : my project !

    I continued yesterday to brainstorm and I arrived to something not so bad for standard motor C80100-130kv : -50km/h = 436 rpm at the wheel -Derailleur chainring 11/42 stage : ratio = 3.81:1 = 114 rpm at crank -Chainring belt/crank 14/42 stage : ratio = 1:3 -2nd stage belt 72/18 : ratio = 1:4...
  11. M

    Mid-Drive 80100 : my project !

    Yes, this is what I wrote : :mrgreen: :mrgreen:
  12. M

    Mid-Drive 80100 : my project !

    Can you explain why I should not go for that type of reducer ?
  13. M

    Mid-Drive 80100 : my project !

    Hey Ecyclist, I try to find this kind of reducer (PLE, PLF, etc...) for C80100, but I never fund for Ø12 shaft C80100...
  14. M

    Mid-Drive 80100 : my project !

    ok for 70 rpm, but how fast ? 50km/h ? I understand well your point of view, but I consider that the ratio 42/11, with 26" wheels, at 50km/h, is not something "difficult". I use to do it without motor when I can do it. But for sure, I consider 50km/h as the max speed, and it will be certainly...
  15. M

    Mid-Drive 80100 : my project !

    Hey dan, you mean that when loaded, I have to consider 15% of losses between loaded/not loaded ? Here is my brainstorming to calculate the kv following speed, crank rpm, and battery : If I consider 50km/h with a 26-1.00 tyre = 436 rpm at the rear wheel If I consider last chainring stage ratio...
  16. M

    Mid-Drive 80100 : my project !

    DanGT86, you're totally right, for the 2 stages belts drive, about the pitch of the second belt ! I didn't find (or not good searched..) charts with Power/RPM - HTD5M/HTD8M for 20mm wide belt... but I thought about it ! My thought on this is : -1st stage : not enough resistant torque, it's...
  17. M

    Mid-Drive 80100 : my project !

    Visual comparative between 1 stage and 2 stage belt drive : (bottom brackets are 68mm standards, not large)
  18. M

    Mid-Drive 80100 : my project !

    Hello everybody :D I don't plane to use it off-road We are speaking about a potential 7000w mid drive, not EC 250w.... :mrgreen: Just to have an idea of the price, in this case with 70kv motor (inclued) and one stage belt drive system : (I just made a copy/adaptation of the 2 stages belt...
  19. M

    AVIAN featherweight mid drive

    I can't wait to see the follow up with 80mm motor :D
  20. M

    Mid-Drive 80100 : my project !

    Thanks Ecyclist for your encouragaments :) But if you plane to "commercialize" your reducer, I could be interested :wink: I have to confess, that I prefere have a small reducer as yours that a multi belt drive reducer, in terms of space, but I know too that it's a compromise between...
  21. M

    Flier Brushless ESC HV 300A For Ebike

    Hey Tahustvedt, did you buy this controller ? I'm interested with this controller, 200A or 300A, the price is low, but what about the quality ? Yes you can manage the current limite :wink: In my case I plane to use it at 12s with a current max at 160A (or 7000w max), these controllers look...
  22. M

    Mid-Drive 80100 : my project !

    Do you plane to create an more strong reducer for the 80100 ? can this reducer pass the 80100 torque ? What is the ratio ? How does it cost to you ? do you have machinery for mcahining ? Is it the same reduction process than that ? : https://www.youtube.com/watch?v=8DYuSvJ-CUw Sure that it's...
  23. M

    Mid-Drive 80100 : my project !

    Hey everybody, don't have time to reply each posts... but great compact reducer Avian ! is it an home made reducer ? do you know its efficiency ? I like the idea to have a dismontable 18650 battery pack, you can replace "easily" a cell if needed... I like too the LMX (frenchy), but the motor...
  24. M

    Mid-Drive 80100 : my project !

    yes my friend, lots of possibility, solutions and design following your need/requirements ! where do you live ? I live near of Paris at Puteaux, I would like to go at work with an electric bicycle, but the problem is the ascent on my path (120m on 4km), that's why I want a powerfull assistance...
  25. M

    Mid-Drive 80100 : my project !

    I want to keep the crankset : -in case of failure, I want to be able to go back home :mrgreen: -I want continue to pedal, it's good for health and grow the autonomy :wink: -I want to keep the derailleur as gearbox for the electric motorization (for big ascent) -for the police, it must look...
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