QS 3000w midmotor

Electric Motors and Controllers
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Ianhill   100 MW

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Re: QS 3000w midmotor

Post by Ianhill » Jan 15 2022 8:01pm

Looks like the 90h comes with water cooling very little in size difference makes its perfect choice for a karter.
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john61ct   100 GW

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Re: QS 3000w midmotor

Post by john61ct » Jan 16 2022 2:59am

Looks like a great choice for my 500+lb cargo bike in long steep mountain road country.

Compared to the Lightning Rods XXL??

The radiator cooling factor really opens up torque possibilities when top speed is not a goal.

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Re: QS 3000w midmotor

Post by john61ct » Jan 16 2022 3:02am

I do wish QS used unique model numbers, so hard to track what's what when Watt capacity is so nebulous a factor

SlowCo   10 MW

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Re: QS 3000w midmotor

Post by SlowCo » Jan 16 2022 4:31am

john61ct wrote:
Jan 16 2022 2:59am
Looks like a great choice for my 500+lb cargo bike in long steep mountain road country.
Wow, that's a heavy rig. Any photos you can post of that bike build?

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Ianhill   100 MW

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Re: QS 3000w midmotor

Post by Ianhill » Jan 16 2022 7:22am

Cargo bike, damn that motor could push a desert bike about upto 60 mph or so and have a pop at a small trailer on the back.

Problem with such a bike is the sprockets gearing a bike wheel down to slow speed high torque for a efficent ride aint no easy task, where as a gokart wheel is easy as its so small.

Someone needs to make a stand up scooter with one these beasts even the 70h be evil on a 6.5inch rim
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john61ct   100 GW

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Re: QS 3000w midmotor

Post by john61ct » Jan 16 2022 4:27pm


SlowCo wrote:Any photos you can post of that bike build?
Nope all so far just ideas in my head.

john61ct   100 GW

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Re: QS 3000w midmotor

Post by john61ct » Jan 16 2022 4:31pm


Ianhill wrote:Cargo bike, damn that motor could push a desert bike about upto 60 mph or so and have a pop at a small trailer on the back.

Problem with such a bike is the sprockets gearing a bike wheel down to slow speed high torque for a efficent ride aint no easy task, where as a gokart wheel is easy as its so small.
As mentioned I want low speed high torque only, maybe 22-26mph max.

Even slower bumping along the desert or forest trails with 500lbs

which is why little wheels are NG hitting logs and ditches.

I figure equivalent OD to a 24-26" bike wheel, would love a bouncy fattie, but needs to be very puncture resistant


SlowCo   10 MW

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Re: QS 3000w midmotor

Post by SlowCo » Jan 16 2022 4:34pm

john61ct wrote:
Jan 16 2022 4:27pm
Nope all so far just ideas in my head.
I figured as much... :lol:
Probably will never happen.

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Re: QS 3000w midmotor

Post by john61ct » Jan 16 2022 5:01pm

Maybe, but knowledge is necessary even if not sufficient.

Personal and family obligations are the limiting factors currently, but won't be there forever.

Jrbe   100 W

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Re: QS 3000w midmotor

Post by Jrbe » Jan 16 2022 6:44pm

Is anyone using these motors with belts? I haven't found what belt spec they're using.

Are rear sprockets available for reasonable prices?

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PITMIX   1 kW

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Re: QS 3000w midmotor

Post by PITMIX » Jan 17 2022 1:31am

8M20 SUPERTORQUE
Aixam 550 Twin retrofit Qs 138 70H, Nuc 24F, LG 20s 60Ah
https://cyclurba.fr/forum/621300/nNlect ... #msg621300
Yamaha TDR 125 retrofit Qs 138 90H, Nuc 24F, LG 20s 60Ah
https://cyclurba.fr/forum/714639/retrof ... #msg714639
Keeway City 50 retrofit Qs 120 70H, Nuc 12F. LG 20s 30Ah
https://cyclurba.fr/forum/698717/e-scoo ... &pageprec=

Jrbe   100 W

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Re: QS 3000w midmotor

Post by Jrbe » Jan 17 2022 6:13am

PITMIX wrote:
Jan 17 2022 1:31am
8M20 SUPERTORQUE
Thanks pitmix!

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tomjasz   10 GW

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Re: QS 3000w midmotor

Post by tomjasz » Jan 17 2022 7:45am

SlowCo wrote:
Jan 16 2022 4:34pm
I figured as much... :lol:
Probably will never happen.
:lol:
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

Quinc   100 W

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Re: QS 3000w midmotor

Post by Quinc » Mar 09 2022 4:07pm

john61ct wrote:
Jan 16 2022 3:02am
I do wish QS used unique model numbers, so hard to track what's what when Watt capacity is so nebulous a factor
Wish they used a normal sized motor sprockets instead of these one off sprockets that only fit qs motors..

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Ianhill   100 MW

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Re: QS 3000w midmotor

Post by Ianhill » Mar 10 2022 8:21am

Im trying to confirm the bore of the water cooled sprocket now i think its 3/4 bore with a 3/16th key but unsure, i thought the 138 70h was a 17mm but it turned out to be 20mm.
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tostino   10 kW

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Re: QS 3000w midmotor

Post by tostino » Apr 18 2022 11:47pm

Where is the best place to source these from? Been a while since I was in the market, and the shipping is just insane. Is there any US domestic stock of them?

Quinc   100 W

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Re: QS 3000w midmotor

Post by Quinc » Apr 19 2022 3:35pm

tostino wrote:
Apr 18 2022 11:47pm
Where is the best place to source these from? Been a while since I was in the market, and the shipping is just insane. Is there any US domestic stock of them?

Only place stateside I know of. https://www.electroandcompany.com/motors-kit

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