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  1. Bike Xing

    Will Tesla stock loose 75% of its value by next January?

    I bet they'd patent the radius of the tires!!
  2. Bike Xing

    Etrike Touring

    Go for it with the mid-drive. You'd be one of the first for that long of a trip which is cooler than it is risky. And it will be an advantage with the weight and hills. On the derailleur thing, I'm surprised more people on this forum are not derailleur haters. On my purely human powered...
  3. Bike Xing

    Etrike Touring

    Seems like a reasonable setup. The biggest wild card is all of the weight. 650 lbs is a bit on the crazy side ...by about 200 lbs. I've played with a few of the Bafang 750 crank drives and they're quite nice. I've also had some experience with the Nuvinci N360. I wouldn't worry as much...
  4. Bike Xing

    A No Solder/Weld 18650 Build

    Love the data.
  5. Bike Xing

    I'm considering buying a Chevy Volt

    We have a Prius Plug-in and we're fairly satisfied with it. We would have liked to go all electric but this is our "do everything" family car and we couldn't make the short range work for as often as we need long range. After we bought it though GM lowered the price of the Volt enough to make...
  6. Bike Xing

    Rohloff SPEEDHUB 500/14 (for mid drive)

    With my Rohloff and both Nuvinci's I cut power while shifting and plow through a large portion of range at a time. It's not a problem. I would be fine with the Nuvinci for a street-only application, maybe, but the weight of the Rohloff off road is nice. Plus, taking the wheel off to manage...
  7. Bike Xing

    VW Buggy Under the Knife, Need Advice

    The price difference is on par with the cost of upgrading the brakes and having regen will be like getting a brake upgrade. The AC-35 motor and controller is $3450. Plus I really like the way a vehicle with regen drives.
  8. Bike Xing

    'Theft of power' lands electric-car driver in jail

    Do it! :D
  9. Bike Xing

    Rohloff SPEEDHUB 500/14 (for mid drive)

    I put a Rohloff on my latest bike. It's here: http://endless-sphere.com/forums/viewtopic.php?f=3&t=55524 I've used a few Nuvinci's and now this. Mostly I like the wider speed range of the Rohloff. The weight difference is also monumental. Otherwise it's comparable. I have had issues with the...
  10. Bike Xing

    VW Buggy Under the Knife, Need Advice

    It's looking like the AC-3X or AC-50 are the only good options. Does anybody out there have experience with these motors in a buggy? I think the engine I pulled made about 65 hp at about 4500 rpm.
  11. Bike Xing

    VW Buggy Under the Knife, Need Advice

    Great points on voltage. This S-10 is using a brushed motor though. Still informative...
  12. Bike Xing

    VW Buggy Under the Knife, Need Advice

    I bought this buggy a few years ago with the intent to convert it to electric. Earlier this year I finally pulled the perfectly good gas engine and sold it. I've been looking for a good brushless motor system to put in. I can't find many examples of people making cars of this size with...
  13. Bike Xing

    where did they come up with this combo..

    The motor interface specifications are captured here: The gears will have a torque limitation as well, but I don't know what they are for this box. Matex sells planetary gears that would likely fit in that housing. I built a bunch of gearboxes that are kind of similar. They look like this...
  14. Bike Xing

    where to find an affordable ac/dc tig welder or DIY?

    I've got what you're looking for. http://www.eastwood.com/ We just bought the 200 AC/DC tig from here a few months ago and it's been great. I think maybe they raised there prices a tiny bit though. I thought we paid $750 and now it's $850. I also have a Lincoln MIG but this new machine is...
  15. Bike Xing

    Have you had a BMSBattery Charger Fail?

    I've had one out of two fail. That about matches the total sample for this survey. It caught fire the very first time I tried to use it. I couldn't tell what caused the problem.
  16. Bike Xing

    Bike Xing's build history

    Donor bikes in order of when they were converted: ~1990 specialized stumpjumper 2001 Trek 4300 2001 Specialized FSR 2013 Specialized Rockhopper 29er 2009 Fuji Thrill Lt Starting with the Fuji Thrill: 400 W MAC motor Rohloff hub with 16T Wide freewheeling bottom bracket with 38T drive and 32T...
  17. Bike Xing

    Test: rear end car with e-bike on rack

    Here's the end of the snow ride in Tahoe. Another guy on a fat bike rode this same trail and based on the tracks he had an easier time of it. I did okay though.
  18. Bike Xing

    Test: rear end car with e-bike on rack

    I built these myself. I never really put together a build thread. I have put some stuff together for ride results. http://endless-sphere.com/forums/viewtopic.php?f=28&t=51114 I took it for an 18 mile trail ride for the maiden voyage and then into the snow this last weekend. Before I made the...
  19. Bike Xing

    Tesla Buys Nearly 2 Billion Panasonic Cells

    Tesla is also making battery backup units for SolarCity. http://www.solarcity.com/residential/energy-storage.aspx http://www.greentechmedia.com/articles/read/Lesson-Learned-From-SolarCitys-First-Home-Energy-Storage-Installs
  20. Bike Xing

    bottom bracket wobbling effect

    On new freewheels I see a little bit (~1 mm) of side to side movement when the cranks spin. On very old beat up freewheels that have been in sand and mud I've see as much as 3 mm. It has never been enough to cause a chain to derail though. How much side to side motion are you seeing?
  21. Bike Xing

    Test: rear end car with e-bike on rack

    Risen from the ashes: This time with a Rohloff rear hub for a little more high end and a little less weight, and a new full suspension Fuji bike.
  22. Bike Xing

    Direct drive non-hub vs hub efficiency

    A hub motor sounds fine for the application you describe; and yes, likely more efficient. I'm a huge fan of mid-drives. That's all I've ridden since around 2005 or 2006, but I like super light weight and therefore lower power. If you don't mind the weight, and you know you're going high power...
  23. Bike Xing

    How to Solar Charge an Electric Bicycle

    This can't be said enough: a grid tied system is the best approach. Not utilizing the panel fully is a waste of resources. And, it's totally possible to put a tiny and inexpensive grid tied system on your house if that's what you want. I put a 580 W system on my old house. Two panels and two...
  24. Bike Xing

    Building cylindrical battery pack for Dummy!

    Just wanted to note another couple good techniques to make end plates: 3D print them. If you don't have access to a printer through a Techshop or work, you can find services on the internet that can print what you want from a 3D model. They're a bit expensive though. You could then use the 3D...
  25. Bike Xing

    Anything To Say About The Xing Middrive?

    Thanks for the props, but yeah, I agree, no kingdom here. I make them and I do ride them off road, seriously. It allows me to do things I could never do on human power alone. Like riding up incredibly steep hills (much slower than a 1+kW bike). I use them to commute too sometimes, but mostly...
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