Recent content by jmwhite151

I was wondering if anyone has made an e-bike powered with batteries from any of the battery powered tools (e.g. Greenworks, Ego, Ryobi, etc). Seems like an interesting way to save on cost (if you already have the batteries) and make the power system modular (e.g. put in one battery pack for a...

Is it possible to set the throttle/current in the CA3 as a function of both torque and cadence from the TDCM torque sensor? Here is what I think I would like to do: Current = MAX ( Torque * A , Cadence * B ) This way the torque sensing gets you off to a nice, quick start. But once you have...

Nice list. Are there any "stealth" frame kits that look more like a regular hardtail? I'm looking for something that looks and rides (aside from extra weight) like a regular hardtail bike for 500-1000 W rear hub motor. I haven't seen any. Maybe it's because it's easy enough to convert a...

I contacted TDCM. Here was their reply: I installed the crank 45 degrees ahead of what is shown in the manual and took it for a quick test ride. It seemed to work fine. It wasn't drawing tons of current, relative to when I give it full throttle. But I think that's probably a setting in the...

I just finished installing the TDCM torque sensor in my Trek 4500. The instructions specify a certain orientation of the bottom bracket spindle with respect to the crank arm (see image). However, the square taper on my crank is oriented 45° differently than shown in the instructions (see other...

Can someone PM me an e-mail address for EM3ev.com? I keep getting a "Forbidden: Permission denied" error when I try to use their online contact form. Thanks, Jeff

Thanks for the input. I have it on a 26" rim, so it will actually run around 33 MPH with no load. (I used a bike computer from a different bike that is set up as a 29er. That's why the linear speed was reported as higher.) I will let you know how it works out. But it might be a couple of...

I just received a Bafang CST motor from BMS Battery. I bought the 500W, 270 RPM motor: https://bmsbattery.com/ebike-kit/589-bafang-36v-cst-rear-driving-e-bike-motor-wheel-ebike-kit.html On the motor, it says: CST 36V500W 26 1506 7052-6 Is there any way to confirm that this is the 270 RPM...

Awesome! I rented a Neo Cross earlier this summer and really enjoyed it. It convinced me that torque sensing is the way to go (although I still haven't tried cadence yet.) I decided to try to build something similar myself. Hopefully it turns out at least half as fun to ride. Enjoy!

https://bmsbattery.com/ebike-kit/768-q128c-135mm-500w-rear-driving-ebike-hub-motor-ebike-kit.html 1. Is a 328 RPM @ 36V different from a 328 RPM @ 48V? Are they wound differently? 2. Which one (including the 201 RPM windings) would be the closest to the 500W Bafang CST @ 270 RPM? And how does...

Thanks for the info. I ended up not needing to file anything, not width anyway. It was a fairly snug fit, but it fit. Although as you pointed out, I may need to file it a little deeper so that the center of the axle sits where it was intended to on the frame.

Here's info on my first bike build in case people are interested or it helps others: Background - This is my first bike build. The motivation was to build a bike for my brother. He can only pedal with one leg due to an injury. This makes going up hills very difficult. So the goal was to...

I contacted GreenBikekit.com and they said the SWXH comes with the 9 pin connector and is compatible with the integrated controller. I asked a follow up question about whether or not the SWXH has an internal speed sensor. I'll let you know what I find out. Thanks for the help!

Thanks. Two follow up questions: 1. Does the Bafang SWXH have an internal speed sensor? I couldn't find anything conclusive on this. But the controller I'm planning on using requires it. 2. Does anyone know if this controller will work okay without the PAS? Maybe this is a dumb question...

Do people ever have too modify dropout widths to install hub motors? I'm looking at putting a Bafang SWXH on a Trek 800. The drawing for motor says the flat-flat dimension is 10 mm +0.0/-0.1. I'm measuring the width of the dropouts to be roughly 9.5 mm with calipers. I wiped both sides to...