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  1. T

    torque arm picture thread

    Looking for a Torque Arm for my pull-off KHS fat tire fork. https://lunacycle.com/fat-tire-rigid...6-non-tapered/ My nifty drawing below of how the torque arm could look. . It would attach to the fork with a top bolt( in red) and a bottom bolt (in blue). I'm attaching a 500W Bafang front hub...
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    Two 24V Batteries for 48V eBike?

    I'm transitioning from a sticks & bricks house to a Tiffin Allego Bus (RV). I plan to travel the country off the grid with 1000W of solar and a massive bank of lithium ion batteries. The first generation of programmable solar controllers built for lithium ion batteries are just coming out to...
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    Two 24V Batteries for 48V eBike?

    Can I use Two 24V Lithium Batteries in place of a single 48V battery? College taught my I can wire them in series and it will work, however real life is rarely as simple as exams questions. I currently use the http://lunacycle.com/batteries/packs/48v/48v-panasonic-11-5ah-or-13-5ah-dolphin/ 48V...
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    4-wire PAS

    Any update on this? I plan on buying the same kit to power an old (but working excellently) 48V 1000W Direct Drive front wheel drive motor that lacks an internal speed sensor. BMS Battery indicates that an internal speed sensor is required, but I think an external sensor & some soldering can...
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    Components of a High Speed Fat Tire Electric bike

    Dual Drive HIgh-Torque & High-Speed: Why haven't I seen this? My initial thoughts for building an electric bicycle was to build a dual drive system. The front wheel would be high torque but with a low speed, activated by a PAS only and it would max out at about 15MPH. The rear wheel would be...
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    Components of a High Speed Fat Tire Electric bike

    Thank you all for the great information! :D I'm impressed with the different eBikes several people have built and shared with on the forum. It appears that almost all of the bikes that meet my performance guidelines required serious modification as a matter of necessity not desire. Does...
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    Components of a High Speed Fat Tire Electric bike

    Did you post a link to your build? What frame did you select?
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    Components of a High Speed Fat Tire Electric bike

    What I'm looking to build is very similar to the photo you posted, but I intend to make my bike look as much like a regular bike as possible, using a kit similar to this https://bmsbattery.com/ebike-battery/701-48v116ah-bottle-09-panasonic-battery-torque-sensor-battery.html. Do did you write a...
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    Components of a High Speed Fat Tire Electric bike

    The task of fitting motorcycle rims to a Fat Tire bike frame and lacing in a hub motor seems like a considerably amount of custom work with special tools, or is the process less complicated than I'm anticipating?
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    Components of a High Speed Fat Tire Electric bike

    My SandViper is a hardtail 18in fatbike with 4x26 wheels and I've gotten it to 43kmh and felt very safe with the major limitation being gearing and the fact that i'm 6'1 @ 226lbs. My thoughts were that front suspension would absorb the impact of hitting a pothole at 35MPH, as I don't believe...
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    Components of a High Speed Fat Tire Electric bike

    My post made it very clear that I was aware that dual suspension fat tire bike frames existed. My question pertained to the frames ability to handle standard road conditions at 35MPH, a speed that a only racing bikes are built to handle. My initial reaction was that you were trolling, but...
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    Components of a High Speed Fat Tire Electric bike

    (Reserved for the component research) Frame: I am looking for a dual suspension frame that can withstand the impact of hitting a standard pothole or road elevation change while traveling at 35MPH. I’m not looking for anything extreme, essentially I would just want to be able to follow a scooter...
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    Components of a High Speed Fat Tire Electric bike

    I currently have a the SSR Sandviper, a 350W fixed frame 26x4 Fat Tire bike and I love using it to ride to work at 18MPH. I love it so much that I want to build a faster and safer Fat Bike. I’m looking for anyone who has experience building electric bicycles that go over 25MPH, in fact going...
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    4-wire PAS

    The motor I intend to connect to this kit is similar to this, https://bmsbattery.com/ebike-kit/469-q11-48v1kw-front-driving-disc-brake-hub-motor-ebike-kit.html.html. [/url] This uses 8 wires, 3 phase wires power the motor, 3 hall sensor wires control the speed, and a +5v & ground for powering...
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    4-wire PAS

    I was going to order the same controller with the 48V bottle battery. https://bmsbattery.com/ebike-battery/681-48v10ah-bottle-09-e-bike-battery-pack-battery.html Have you made any progress? BMSBattery.com states "It only fits the motor with inner speed sensor. Please make sure your motor has...
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    KIT I BOUGHT ON EBAY DOESN'T WORK!!!!

    I purchased a used mongoose bicycle http://www.walmart.com/ip/26-Mongoose-Ledge-2.1-Men-s-Mountain-Bike/26999421 that had been fitted with this generic 1000W 48V ebike kit. http://www.amazon.com/Motorize-1000w-Electric-Bicycle-Conversion/dp/8805001546 The bike came with 4 SLA batteries...
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    How to test a used eBike

    You are correct, this power supply was used to substitute for a 48V SLA battery that was dead, it powered the controller and allowed me to test all other functionality for under $20 shipped.
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    How to test a used eBike

    The 48V 3A AC to DC power supply arrived from China this weekend. When the throttle is depressed fully the motor would start and stop quickly, but when the throttle was only lightly depressed the wheel spun continuously. I'm fairly certain that this is a result of the 48V power supply only being...
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    SLCD-3 display settings, P and C parameters

    d8veh - I did some additional research into back EMF and I believe that I understand your answer, please let me know if I'm correct. http://electronics.stackexchange.com/questions/159512/back-emf-of-dc-motor The following conditions are applied, the PAS is set to off, the throttle at maximum...
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    SLCD-3 display settings, P and C parameters

    I'm fairly certain that there is a limit when I approach 32 km/h, so I performed the following test. I start with a full battery and the PAS set to 1of5. I begin pedaling and soon reached 15km/h. I pull back the throttle and I can hear the motor whine and the current meter on my DMCH TC-480...
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    SLCD-3 display settings, P and C parameters

    The instrucitons for this are included in the manual here https://bmsbattery.com/ebike-kit/670-s-lcd3-lcd-meter-for-s-series-controlers-ebike-kit.html '5 seconds after the meter is powered on, at display 1, hold both the button (UP) and the button (DOWN) simultaneously for about 2 seconds, the...
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    SLCD-3 display settings, P and C parameters

    What is the Maximum speed that can be set? My current eBike the SSR Sandviper http://www.ssrmotorsports.com/store/ebicycle/sandviper.html begins to cut the current to the motor when the speed approaches 20MPH and will reduce the current to zero as my speed exceeds 20MPH (pedaling very fast on...
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    09 bottle battery

    What I'm looking for is what 48V BMS systems will fit into the bottle case shown here, http://www.elifebike.com/peng/iview.asp?KeyID=dtpic-2015-47-JKHT.457DR, because I'm fairly certain that this case comes with a 36V BMS, so I'm going to need to swap it out with a 48V BMS. Any assistance in...
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    How to test a used eBike

    The wheel spins freely when the 3 phase wires are not touching (shorted) and comes to a quick stop when I touch them together. There is some corrosion and scorching on the connectors. The wheel spins freely when the 3 phase wires are connected to the controller, just as it did when it was not...
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    09 bottle battery

    This battery has several unique features like the 5V USB output, I wasn't sure if that case required a unique BMS that would both fit in the case without modification.
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