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  1. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Some new developments around this ebike. Normal buyers find ebike way too much expensive for their use in India & hence are reluctant to buy it. I have been talking to home-delivery companies (who use 100cc motorcycles currently) for using this ebike and they seem very interested in it. This...
  2. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    I agree. I have a headlight, tail light setup and plan to add turn signals later. But Indian traffic is a different ball game altogether. These safety precautions do matter but play little role in your reaching home safely. :mrgreen:
  3. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    I guess thats why this is the most common setup for most e-scooters / mopeds. I have come to realize slowly that what I am making is no longer a bike but more of an e-moped that can be used as a bike recreationally. Currently I have a 22" setup which I plan to change to 20inch fat tires like...
  4. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Yes. The manufacturer say that I will need at least 48v 10ah for 50km. In my understanding, with a passenger this range will come down to ~30km.
  5. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Thanks for sharing your experience Mike. This really helps. Will try my to compare my geared & DD side by side and share my experience here. And yes, I do take Dogman's words very seriously. :D
  6. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    20% less is quite a big number. I guess I have to stick with geared motors. Thanks for giving such specific info. :D
  7. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Thanks for sharing this. I guess, acceleration is not DDs strength. Will let you know my experience once i assemble mine.
  8. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    I want to ask how much less efficient :mrgreen: , but I think the best way to find out is by myself :) . My sample should arrive next week. And I will try to post how the new DD faired against MXUS geared. Always good to get insights like this from you. Just as you said, the roads are quite...
  9. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Hahaha.....that is a good piece of info. I will have to try the bike myself to understand better. sample arrives in a week. The idiot that I am, tried all kinds of geared motors & after discussing with them finalized on DD motor without trying it on the bike. They told me everything is pretty...
  10. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    I sometimes pedal on MXUS geared (36v x 15amp) as i feel it slows down a little on flyovers but don't need to do so. Instead of 25kmph, it pulls me just fine at ~22kmph. Do you think that a 48v x 13amp bike will slow down similarly? For the moderating effect on downhills, is that because of DD...
  11. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    So does that mean that for city use, with frequent traffic signals & crazy indian traffic, geared will give better range & performance and should be more preferred? I wonder why almost every electric scooter (3 million sold every year there) in China has direct drive motor if it is not better...
  12. Choudhary

    Comparing DD vs geared motors : Best setup for city commute

    Namaste. I am from India & have been working on ebikes for sometime. I was using MXUS (Chinese) geared hub motors (250 watts) in my bikes & was happy with them but they were expensive for Indian market. I visited Shanghai Cycle fair to get more understanding of ebike technology & spent some time...
  13. Choudhary

    Life, maintenance & repairing of geared hub motors

    That actually sounds good. I read somewhere that most of the DD hub motors are actually 9c clones. But i still couldnt find any in sub $100 range. Can u share a link for this :) Servicing can't be avoided in this industry :). I do plan to stock parts & provide servicing / repairments. I just...
  14. Choudhary

    Life, maintenance & repairing of geared hub motors

    True. but as a seller, I am preparing for the worst use case. what happens when the motors are exploited to their limit. do their gears strip off? or something else happens. I talked to the company people and they said that the speed sensor dies in 3-4 years & it is easily (and cheaply)...
  15. Choudhary

    Life, maintenance & repairing of geared hub motors

    Namaste. I am based in delhi, india. for the last 6 months i have been playing with the concept of ebikes (relatively new in India). I have made 2 bikes till now: 1 semi recumbent & 1 upright. I have used mxus geared front hub motors in both & am happy with the result. I have tried the best...
  16. Choudhary

    Using a hub motor and solar panels to charge batteries

    I completely missed mentioning the charge controller. I thought it is a part of the junction box in every solar panel, hence goes without saying. My bad. So yes, I will be adding a charge controller with the panel. And I guess with that I can regulate both the voltage (at 29v may be) and...
  17. Choudhary

    Using a hub motor and solar panels to charge batteries

    Thanks a lot Dogman. That thread is full of useful information. I also agree with your suggestion of going with a 24v panel & avoid over charging of the batteries. Just to clarify, if i use a 24v panel and wire them directly to the batteries, i don't need a booster & a fan setup, right?
  18. Choudhary

    Using a hub motor and solar panels to charge batteries

    Namaste everyone. I am planning to try out a similar solar thing on my bike. I have semi recumbent sort of thing, which gives me enough length to get a 150watts panel. I have a few questions though 1. In order to charge 25.9v li battery, we use 30v charger. A 24.2 volt solar panel provides ...
  19. Choudhary

    electric kit on semi recumbent bike (India)

    About the front / rear hub motor. I know most people support rear wheel motor. The primary reason cited for this is that motor in front wheel affects handling a lot (am i right?) Now in India, biking is not as refined as in West. Most bikes weigh around 20kg. And handling is not in the first...
  20. Choudhary

    electric kit on semi recumbent bike (India)

    Another question. A little off topic though. Pedal assist system. my current bike has 8 magnet pas. it works fine. however, since it is a basic setup, it has only one power level. that means, whenever i pedal, the motor gives me a fixed amount of push. from my rides i guess it is around 80% of...
  21. Choudhary

    electric kit on semi recumbent bike (India)

    Got it. BMS is what i am getting now :)
  22. Choudhary

    electric kit on semi recumbent bike (India)

    Got some info regarding VRLA from a helpful supplier (a really big supplier) in China. The batteries I use, though have Indian company sticker, are also imported from China. So i guess this info is pretty relevant. http://imgur.com/ZK0M5Xn According to this 7ah batteries give 4.95ah at 1 hour...
  23. Choudhary

    electric kit on semi recumbent bike (India)

    I was reading the threads for batteries, and came across a brilliant piece by Ypedal. He says, 'Sealed Lead Acid batteries are rated C/20, so a 10ah lead acid battery will deliver 10 ah if it is drained over a period of 20 hours, the problem with this is that on an ebike we use energy at a much...
  24. Choudhary

    electric kit on semi recumbent bike (India)

    Thanks a lot. Went through some threads. saw some interesting things, particularly, attaching the battery on the lower side of Down tube. Alright, the controller goes outside then. Another thing, has anybody tired out / heard about the Leeds 250 series. They also use a 24v setup (but with...
  25. Choudhary

    electric kit on semi recumbent bike (India)

    Another thing. I am having hard time finding any casing for the batteries. So will be making them myself. Since I am using GEL batteries, the only position i can think of is rear rack. One battery size 151 x 65 x 94. So I will try 151 x 205 (+20) x 94 box. Is it OK to place controller in the...
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