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  1. S

    Ryobi Lithium batteries Good for ebike?

    Home Depot has a sale today. 2 of there 18v 4ah Lithium+ batteries for $100. Anyone have experience with these?
  2. S

    Why can't you run 2 brushless motors off 1 controller?

    I just can't seem to wrap my head around this concept. What would happen if you took 2 hub motors and hooked the phases up to each other and then spun one of the wheels? Would both wheels spin at synchronous speeds? 1 acting as a gen and the other as a motor
  3. S

    Full Suspension XC vs Downhill Frame For Light Duty Offroad

    So I know alot of you guys go for the DH/Freeride bikes for high speed and serious offroad machines. I'm looking at a Giant NRS XL Frame that I can get a good deal on. How well would something like this work for moderate offroading? Dirt and grass trails with the occasional log and rock I...
  4. S

    Battery Performance when a Cell goes bad?

    So I feel like this is a dumb question and I should know this, but what exactly happens to a battery's performance when a cell goes bad? My guess is that the internal resistance of the "bad cell" increases substantially creating a bottleneck for the other cells in the string to force current...
  5. S

    Chainring Reccomendation for High-Speed Pedal Assist

    So I really like pedal assist and the ratios are almost perfect with my current setup. 36v, 9C 2808r with a 9 speed freewheel (11T smallest sprocket and 44T largest chainring) on a 26 x 2.14 tire. However, in the near future I will be doubling the voltage to 72v and will be slipping on a...
  6. S

    Tires and Tubes For 9C Motor?

    So I got a 2808 rear motor kit from ebikes.ca and I'd like a quality set of tires. Ideally I wanted something dual purpose, something good for the street and light duty offroading. (Grass, Gravel, Dirt, occasionally mud) But I been hearing such great things about the CST Cyclops tires and at...
  7. S

    Acceleration at 72v vs 36v?

    I got a 2808 motor, a 40 amp Infineon controller and a 36v 10ah nimh battery pack. Will acceleration improve when I double the voltage to 72v? Obviously it will go twice as fast. I know with a brushed DC motor when you double the voltage then the motor will draw twice the current. However I'm...
  8. S

    Building a BIG NiMH pack and trying to charge in parallel?

    See post #14 for more details. I'm wondering if there is any way to safely charge NiMH cells in parallel. I've heard that it may be possible to use a thermistor to reduce the current flowing into a string of batteries when they begin heating up. What if the batteries were charged only to a...
  9. S

    Most efficient motorcycle/moped hub motor?

    My school is building a new solar race car and is looking for a set of 2 hubmotors to use in the upcoming vehicle. System efficiency is the key since your limited to a battery pack of about 4kwh and a solar array of about 1.5 kw. We're looking for a combined 10-15 hp with a max RPM of around 600...
  10. S

    So why exactly are RC motors so loud anyhow?

    My ceiling fan motor doesn't have any brushes either and it's almost completely silent. What's the deal? Lower frequency?
  11. S

    Anyone make there own disc break spacer?

    I have access to a Bridgeport mill and was thinking about making my own spacer so the rear caliper clears the hub motor. Anyone done this?
  12. S

    Converting an Infineon Controller to work at Higher Voltage

    I recently purchased an Infineon 72v 40 amp controller off ebikes.ca and want to know if its possible to modify it to run at 96v?
  13. S

    Running different sized batteries in series?

    Can you run batteries together in series that have different capacities and only charge them up to the capacity of the smallest battery? I know in general its not a good idea to "mix and match" but I'm talking about same chemistry and voltage here. For example running 2400mah and 2600mah NiMh...
  14. S

    N00B Need info On Freewheels and Throttles

    I'm about to pull the trigger on a 9C motor and an Infineon controller. Where can I buy a higher quality throttle than the ones that are sold on ebikes.ca? Would a Magura throttle work? Whats the difference between 5k and hall effect and which do I need? Also are there any multispeed freewheels...
  15. S

    Where to buy 9C Motors

    Is ebikes.ca the only place to buy these now? I'm looking to buy a slow wind motor and run it at high voltage
  16. S

    Where to buy a 9c 2812 motor?

    I want a rear 2812 9c motor in a 26in rim that's disc brake compatible. Does anybody make this or would I need to lace it myself?
  17. S

    New eBike Project Iron Horse Maverick

    Here's a pic of my Iron Horse Maverick SE I plan on converting. It's a 21.5" frame with disks front and rear and a 9 speed cassette. I plan on using the 9C 2806 hub motor kit from ebikes.ca with a 48v 14ah SLA battery pack. I have a surplus of SLA batteries laying around from scooters and UPS...
  18. S

    Golden Motor and Hub Motor Questions

    I recently gained some enthusiasm on my e-bike project and am now considering using a hub motor. I'm building a front suspension mountain bike that will hold three 12v 12ah, batteries (36v, 12ah). This bike is going to be mainly a cruiser with a top speed of about 20mph. I'm thinking that the...
  19. S

    Electric Bike Build

    Hello, I'm a new member here and I wanted to show off my ebike project. I had two major when designing this bike. One was that I wanted a relatively low center of gravity which means the batteries would have to be located down low. My second goal was to design a system so that the pedals...
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