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  1. snowranger

    Looking for feedback on this battery

    Hi, I am seeing this battery on aliexpress. Claims 21700 liitokala cells 52V 30ah for $249 shipped from China. Its the perfect dimensions for my scooter. Too good to be true? aliexpress link
  2. snowranger

    Advice for commuter with kid in SF

    Here is the link to my build. It is a Yuba Mundo https://endless-sphere.com/forums/viewtopic.php?f=6&t=64647 I have since replaced the Nuvinci with a simple derailleur system. Much cheaper and easier to maintain. The drive train parts are these. They tend to wear out over time...
  3. snowranger

    Advice for commuter with kid in SF

    I live in SF also, and have been ebike commuting for over 8 years. My route is from the Sunset to the Financial District (16 miles round trip). First 6 years were with a clutched hub motor and the last two with the Bafang mid drive. The hub motor was good when the kids were under 10 but now...
  4. snowranger

    Full suspension mid-drive folding ebike, oh yEs!

    Do you guys find that the chain line is okay with such short chains?
  5. snowranger

    My 16" folder Mid-drive BBS02-750w build - COMPLETED

    Nice build.. Any updates? How is the igh holding up with the power?
  6. snowranger

    How to: disable PAS on Bafang BBS02

    Has anyone used this with a cutoff switch for gear changing?
  7. snowranger

    Bafang BBSxx - fault finding and fixes

    I recently recently replaced my right side thrust bearing and am back on the road. I was wondering if it matters which way the bearing ring is placed? i.e. facing out or in? I watched a video saying that the ball tray should be facing in. Also, I used a needle nose plier to tighten the...
  8. snowranger

    Tack weld BMC/MAC Clutch

    Thanks. I watched the video. Not as easy or straightforward as I thought. There seems to be a couple different versions of clutches out there.
  9. snowranger

    Tack weld BMC/MAC Clutch

    Thanks. I'm not running excessive power. My daughter just likes to jam on the throttle.
  10. snowranger

    Tack weld BMC/MAC Clutch

    My clutches have been breaking so often that I am thinking about throwing in the towel and tack welding them. I have been playing around with a 50 amp 120V stick welder but cannot get enough penetration to make a weld. I am a newbie welder BTW. Has anyone else done this? Should I get a 1/16"...
  11. snowranger

    Bafang BBS02 Top Speed?

    With the right gearing and you adding in about 300 watts of pedaling, you can definitely hit 35 mph. My bbs02 tops out at 32 but could definitely make it with higher gearing.
  12. snowranger

    Yuba Mundo BBS02/Nuvinci (3400 mile update)

    Even with the long tail cargo bike, I was getting persistent chain dropping on bumpy roads. I imagine many are dealing with chain ring derailment. It is nerve racking to jam the chain between the motor and chain ring at 30mph through an intersection. After trying a few things, I used the...
  13. snowranger

    New Bafang Crank-Drives

    Thanks for posting that.
  14. snowranger

    New Bafang Crank-Drives

    Can you post a link to the circuit you are using? I tried using one of the diagrams I found, but could not get it to work.
  15. snowranger

    Advice requested for e-bike kit for Yuba Mundo

    I can pretty much go up anything with my bafang mid drive; however, you need to secure that rear axle since the Yuba has large horizontal dropouts. See pic.
  16. snowranger

    Advice requested for e-bike kit for Yuba Mundo

    A front hub motor would be the cheapest. The extra wide rear yuba drop-outs require an axle adapter (about $20). Also, you do not need to buy a new freewheel for front drive application.
  17. snowranger

    Bafang BBSxx - fault finding and fixes

    I just changed my pinion gear last night. So much quieter and smoother. I got 2500 miles out of this gear. I am wondering what a typical life span is with moderate power. There is also a new motor version with a new gear type. Does anyone know if this is much more durable?
  18. snowranger

    Bafang BBSxx - fault finding and fixes

    http://www.greenbikekit.com/bafang-8fun-mid-crank-kit-bbs01-bbs02-iron-gear-replacement.html
  19. snowranger

    Yuba Mundo BBS02/Nuvinci (3400 mile update)

    Thanks for the info on the double chain ring. Do you have a close up picture of how the chainrings are bolted together?
  20. snowranger

    Yuba Mundo BBS02/Nuvinci (3400 mile update)

    Fraser, I have a 20t sprocket on the Nuvinci hub. That gives me 10 - 35t. However, my front chain ring is a single 46t. That gives me a low ratio of 46/35 or 1.31. A mountain bike would give 22/32 or .69 . To get the same gearing you would need to use a 22t chainring up front. I don't...
  21. snowranger

    Nuvinci developer kits for cheap

    I just broke my speed sensor changing out the wheel. Does anyone know the specs of that sensor? Still waiting for an answer from Fallbrook.
  22. snowranger

    Nuvinci 171 spokes breaking

    I ended up getting double butted spokes (14-15-14) from dans comp. They have really good prices. http://www.danscomp.com/products-PARTS/435915/Sapim_Stainless_Double_Butted_Spoke.html I might get a sun rynolite rim which also uses 207 mm spokes. I forgot that thinner butted ones are stronger...
  23. snowranger

    Nuvinci 171 spokes breaking

    I should have mentioned 1 cross. I contacted Nuvinci, and they said that the max gauge is 13.
  24. snowranger

    Nuvinci 171 spokes breaking

    Thanks for the response. They are breaking at the nipple end. The bike is a heavy yuba mundo with 2.0 schwalbe marathon tires, run at 40 psi. Two kids ride on the back for about 2 miles per day. My total commute is about 20 miles through San Francisco hills. I actually built the wheel...
  25. snowranger

    Nuvinci 171 spokes breaking

    I have been running my N171 developer kit with the bbs02 for about 1500 miles. I regularly do 23 percent grades, and love it. The torque must be pretty high because all of a sudden, my spokes are breaking at the nipple end. They are 14ga size. I never had this problem with the BMC geared...
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