e-bike conversion kit

[jackwong]

I have a friend in USA to ask me below question:
We would be interested in what you have in brushless both direct-drive and geared (rear motors only), along with controllers, and other items except the batteries (right now).
They must be capable of freewheel on the right side and disc brake on the left side. 
And as we first mentioned below,
We would like the spoke flanges to be closer to the gear side so that the spoked wheel will be centered over the 135mm axle.
 
Other desired specifications:
1000W
capable of 50kph
capable of 72v (both the motor and controller?)
Can you supply 72v / (35-40 amp) controllers?
How many magnets are in the direct-drive motor?
How wide are those magnets?
Are the motors sealed to be waterproof, including O-rings around the axle bearing?
Do they have standard 6 bolt disk rotor mount on the left side cover?
Regarding the geared motors, what material are the gears made from?
 
Do you have any drawings that show all dimensions of your direct-drive and geared motors


Anybody to help me, pls?

[Hardcore]

go to http://goldenmotor.com for all the info
and about 72 etc. that's controller II or the Piant motor or so. capable of 90v and programmable for 1000w continuous

[e-lmer]

Not all your questions are answered on the GM site.

That the motors are not sealed or waterproof.

GM Electric motors are Direct Drive, not internally geared motors.

The number of magnets and poles is not usually useful information
except in small motors (RC or Aircraft)

The wheel motors are 48V.  If you want to run 72V then you are
over-driving the equipment.  You may be more satisfied with the
non-wheel motors and controllers from the BLDC motor link on
goldenmotor.com.

And the question your friend did not ask, a 72V 12AH battery pack would
way around 60 pounds, not counting any mounting hardware it would require.

Add 15 pounds for a motor, another 5 pounds for wiring and crap, and you are
adding about 80 pounds to a 20 pound bike.

This hundred pounds would not be nimble, and would probably not be within
the static load limits for most bike frames.
(Remember, the battery, motor, etc are not on a cushy seat and can't stand
up when you hit bumps.)

I am currently running a 36V bike, and after trying Sealed LeadAcid batteries,
I ponied up the bucks for a LiFePO4 20AH pack.

When I get the 48V Magic Pie motor I just received on a bike, I am not gonna
put 45 pounds of lead on it, I am going to bite the bullet and get
the GM pack.

GM: PS: I want a 20AH pack in a nice case like the 12AH ones are in.

[Hardcore]

GM: PS: I want a 20AH pack in a nice case like the 12AH ones are in.

Me to

[GM Brazil]

Sure!! Me too!

And the smaller capacity packs in smaller packs. My clients are asking for options to put the batteires inside the frame's trangle, like those from bionx.