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  1. R

    I am trying to find out the Watt draw of the First Generation Duracell flashlight Costco sold.The 3&4 cell using C battery.Bafang bbs02 compatible?

    300 mA is less than a third of an amp. So you won't be able to measure the 0.5A (500mA) that you are estimating for your light. It should have been zero if the light wasn't turned on. There is short in your circuit somewhere.
  2. R

    I am trying to find out the Watt draw of the First Generation Duracell flashlight Costco sold.The 3&4 cell using C battery.Bafang bbs02 compatible?

    https://www.allaboutcircuits.com/textbook/experiments/chpt-2/ammeter-usage/
  3. R

    I am trying to find out the Watt draw of the First Generation Duracell flashlight Costco sold.The 3&4 cell using C battery.Bafang bbs02 compatible?

    Watt is a unit of power and not current. Watts = Amps (current) X Voltage. So 3W at 6V would be 0.5A of current. If you have a multimeter, you can measure the current while the light is on. Select the current function on the multimeter and choose DC. Put the probes in series with the circuit.
  4. R

    Yeah, e-bikes are the future

    I get where you are coming from, but I have never felt like a purist. E-bikes are part of the future for sure and more than half the bikes I see on the road these days are e-bikes. I enjoy riding both my e-bikes and my road bikes. I do my own maintenance on my bikes, so haven't had too many...
  5. R

    Battery compatibility questions for first build. Tips appreciated

    I have a Jumbo Shark battery from EM3EV that I am very happy with and they have a good reputation here. So your first battery would be a good choice. I am not familiar with the second seller. Yes, you should get a battery rated at or above the current your controller is rated for.
  6. R

    E-bike build Overvolting dd hub motor

    It seems like a 100W LED white chip with a 60° lens that you need a fan to keep cool would blind oncoming drivers. Also, do you really need to charge your phone on your 1.7 mile commute at 40 mph? I probably sound like a grumpy old man, and I am one, but it is a little frustrating to read this...
  7. R

    First time group ride organizer need help!

    I wouldn't get too crazy with the rules at first. I would recommend finding a group of like minded people first and then have a meeting to discuss the potential routes, rules, and schedule. One approach would be to find a local ebike shop as a sponsor and put up posters advertising an inaugural...
  8. R

    Ebike for my mom

    I had a contract in Concord for a few years and rented a room there. I live in the Southern California mountains. I am currently working in San Jose and have an apartment there for work. MTA: Concord isn't all bad. I stayed in the east side of town for the first two years and in the northern...
  9. R

    Ebike for my mom

    Sure, a three wheeler might be what she needs. It depends on the person, as I said. And, no, the lady who passed us was not wearing tights or a cape.
  10. R

    Thumb Throttle

    Three wire throttles use a hall effect sensor. One wire is usually ground, one wire signal, and the third wire +5 volts. Your twist throttle also appears to have controls for power on, high, and low. You probably need something like this to replace it: 48v Led Thumb Throttle (Right)
  11. R

    Anyone used this for motor/controller temp measurement?

    I would probably just throw it in the parts bin. Something may come up in the future that it will work perfectly for.
  12. R

    Ebike for my mom

    It depends on the person. I used to go on 20-25 mile weekend rides with a 76 year old friend. He rode a non-motorized mountain bike. We would also do 6 or 7 mile hikes together in the hills. One time, while hiking up Mount Diablo, we got passed by an older lady effortlessly climbing the steep...
  13. R

    Ebike for my mom

    I think that would be a reasonable solution if you Mom is comfortable changing the battery.
  14. R

    Ebike for my mom

    "I don't anticipate her putting a ton of miles on the bike" and "With decent range (50-70 miles?)" seems to contradict each other. 50-70 miles is going to need a very big battery or a fit rider that contributes a lot by pedaling. This forum is mostly for people who build their own ebikes from...
  15. R

    Why are E-Scooters/their motors listed as having SO much more power handling capacity than E-bikes?

    Bicycle components are not designed to handle high powered motors and speeds much above 25-30 mph and there may be liability for companies when things start breaking and people get hurt because their device was used inappropriately.
  16. R

    Help me choose a motor / battery set up :)

    I have front hub motors on my two Bromptons and it works totally fine in almost all situations and I think it work for your use case. You will be on pavement most of the time and won't have traction issues. You can get the clean look you want without having to deal with the 120mm rear O.L.D...
  17. R

    Budget friendlier option than Keyde?

    To be fair, neptronix told him to go ahead and create the second thread asking for advice on what to buy and I think his understanding and requirements evolved after what he learned on this thread. He stated his use case in the second thread. He is a Youtuber that chases other (faster) cyclists...
  18. R

    Help me choose a motor / battery set up :)

    After re-reading your original post, I think your biggest challenge if you want a rear hub motor is going to be that 120mm O.L.D. Most motors are intended for bikes with a 135mm or larger. If it is a steel frame, you may be able to spread the dropouts (cold set the frame). If it is an aluminum...
  19. R

    Help me choose a motor / battery set up :)

    You probably want a geared rear hub motor, but that is not the only option that you can install on that bike. A front hub motor kit would probably be easier to install, but they can sometimes have issues with traction on loose gravel and sand. A mid-drive motor like the BBSHD attaches to the...
  20. R

    Ultimate puncture proof bike tires? testing Kenda K-shield and K-shield Plus

    Have you seen this tire? It is made from a metal alloy and flat proof. I don't think it is for sale yet though. Cycling — The SMART Tire Company
  21. R

    Budget friendlier option than Keyde?

    No, you aren't getting a lot of bang for the buck with that kit. Batteries that can fit inside the hub motor or in a water bottle are going to have very limited range and current output. And controllers inside the hub are hard to service, replace, or upgrade. These days in California, more...
  22. R

    Multi-speed to Single speed conversion

    Also note that a freewheel is not the same as a cassette. You have to know which type of cogs your rear hub uses so that you can order the correct part.
  23. R

    Multi-speed to Single speed conversion

    The chainstays are the tubes on the bicycle frame that run from the bottom bracket to the rear dropouts. A wider bottom bracket spindle would push the chainring further out away from the chainstay, but it will also mess up the chainline (the rear sprocket and chainring should be in a straight...
  24. R

    Bullitt (bucket cargo) with BBSHD - Should I go IGH?

    Changing flats on an IGH is also a pain. At least with the Sturmey-Archer on my Brompton. But it is doable on the side of the road. It is advisable to practice adjusting the shifter after removing and re-installing the wheel at home before you attempt to do it on the road though.
  25. R

    Multi-speed to Single speed conversion

    A 38T in the front with a 14T in the back would result in a pedaling speed of about 15 mph at 100 rpm. Most people are comfortable pedaling around 60-80 rpm. I like a higher cadence of around 90. You will feel like you are spinning out around 100-110 rpm. So you will spin out around 15-17 mph...
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