Catrike with Grin All Axle front hub motors

General Discussion about electric bicycles.
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ecat   10 W

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Re: Catrike with Grin All Axle front hub motors

Post by ecat » Aug 21 2017 11:20pm

Nice project Dave! More power is hard to resist, hope you stay safe on that beast. Wish I had made it to ElectraFest.
Hey John! Yes, I have to remind myself to take it easy... So nice being able to choose where cars will pass (if at all) here with the narrow twisting roads. Every time I get on this thing I can't believe how good it is. The regen braking is fantastic, I basically hardly use the regular brakes at all. 1.6 KW of braking above about 30 km/h
That's a pretty cool project. Could make an interesting Boosted Trikes article.
Not familiar with boosted trikes, I'll have to check it out...
Looks sharp. I like the look of those motors on the front. How is it to peddle with no power ?
It pedals just fine, the cogging resistance of the motors is not really noticeable. It still out accelerates a road bike if we both just coast down a hill. With all this power I still pedal most of the time as I want to get some exercise.
Holy crap! You did it!

More images please!
OK, I will get some more pics...
Left and right handle bar throttle. Plus a muxus 3,000 on the rear with a dual foot throttle. You knew it was coming.
I admit it has crossed my mind to add another motor, it would be an acceleration monster... But it is really enough now, I'm not aiming to drag race. :D
2007 Catrike Expedition, dual Grin Through axle hubs, Dual PhaseRunners, 72V V 20 AH samsung 25R CA3
Edgerunner W Nuvinci hub, Patterson overdrive, Stokemonkey mid-drive. Expedition 19.8 AH Sony V3
Bike hauling trailer with two NC M3007RC hub motors on 20" wheels, two Grin 25A cont, CA3, Prius Plug-in 52V 17 AH
I am an official Grin Tech and Expedition Battery dealer on Salt Spring Island, BC Canada.
***Now the official Canadian retailer for Juiced Bikes***
https://hilleater.ca/

markz   100 GW

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Re: Catrike with Grin All Axle front hub motors

Post by markz » Aug 22 2017 1:02am

Is that legal :wink: :lol:

I noticed how Grin laced the motor, inbound spokes both flanges.


classicalgas   10 W

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Re: Catrike with Grin All Axle front hub motors

Post by classicalgas » Feb 13 2019 7:52pm

"Commercial tadpole trike needs more weight to the rear, it"s too front heavy without any motor.
I think they are something like 70/30 from the box. Rear wheel needs all grip it can get, that increases safety. My DIY velo is 35/65."

Grip isn't the limiting factor, tipping (up on two wheels) is. It's safer to have a wheel slide than the trike tip over. 70%f/30%r is about perfect, the pair of wheels carrying a high majority of the weight makes the trike act like it has a wider track(all else equal) than if the weight were more equal f/r.

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amberwolf   100 GW

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Re: Catrike with Grin All Axle front hub motors

Post by amberwolf » Feb 13 2019 8:39pm

classicalgas wrote:
Feb 13 2019 7:52pm
It's safer to have a wheel slide than the trike tip over.
Yes. :) The SB Cruiser (a delta rather than tadpole) is able to drift when necessary, rather than tip over.

l1nius   1 µW

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Re: Catrike with Grin All Axle front hub motors

Post by l1nius » Apr 23 2019 2:49pm

Ecat, very nice project, well done!! :thumb: More pictures of the build are most welcome. First thing that comes up in my mind when i see this is, is this possible on a velomobile (waw)? :roll:

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