amkaos

hi
newbie here..
after looking for several days for pair of front /rear hub motors, matched
smallest physical size
750-1000 watt...

as far as total actual build guides etc, I haven't found diy site with much content..

actual parts suggestions are great
build sites would be great..

thx

MikeyMK

I considered it briefly, but i don't see the point. It's a lot of weight for very little gain that i can see. What are you hoping for, from it?

A single, more powerful motor will arguably get you more speed, whilst a rear hub puts all the weight on the rear axle for climbing/accelerating. Handling balance, well that'd be a mid-mount but you're limited on power.

The small geared motors are under 500w, the bigger brushless motors are the way forward, but heavy.

2old

Look at endless sphere for some builds. As MMK states, there are probably better solutions. Be prepared to either have two dedicated, separate systems or a "splitter" so your battery can power both motors. Also, the motors don't need to be the same size. I tested a BH (Easy Motion) eMTB with a 250w motor up front and 350w in the rear. It was a hoot because the torque sensor was stuck and the thing flew up an 8 mile, 3000' ascent like a banshee. Descending rough terrain with two hub motors, not so fun.

Doc_Wui

I made a two motor fat bike to get better traction in snow. Since it was winter, I didn't try to get fancy with controls. Brute force. I used two different 500W motors, two different controllers, two batteries, and two throttles. I only sent pedal assist to the rear motor. I would run the rear wheel off pedal assist and add throttle to the front as desired in heavy snow. I suppose that with practice, I could have managed to start the bike on dual throttles w/o falling over in the snow.

When the snow was gone, I had little interest in running a 75 pound ebike, so I took it back to RWD.

Doc_Wui

Unless you have a purpose built dual motor controller, the home builder will need two controllers. While a single battery could run them, it has to be a battery that can meet the current demands of both motors. That's a big battery. I didn't have one that big, It should be possible to use a single throttle. Tie the controller grounds together and power the throttle off controller A. Split the throttle output and send it to controller B. If the motors/controllers are the same, the power delivery will be even.

One problem is having room on the handle bars for dual LCD screens/consoles. I used a simple LED console for my 2WD setup and all I really used was the throttle.

Dewey101

Was that the Big Bud?

I saw Pedego are talking about a dual motor Stretch cargo ebike with front and rear 500W geared hub motors.

2old

Can't remember the model, but it was a 29er. Only had the one ride on it before we gave it back since it had a problem. Once going, the only way to cut the motor(s) was the brake levers AIR. I rode a Pedego "Stretch" (cargo) bike with a 500w rear hub motor and it was pretty quick with a top speed of 25+ mph and the ability to carry a lot of equipment (my friend used it to tote his voluminous camera array). Two motors would really enhance it.

amkaos

on YouTube I saw controller that supports dual motor etc.
one display.
everything said here about non-matched motors is exactly why I would want matched..

generally, hub motors are big and ugly..
I would want small, discrete.

noisy motors are deal breakers

thx