Grin All Axle front hub motor

I have a hard time believing the weights they say those bikes in the video are.
On the video, the DD is rated 1000 watts plus the inherent construction of the DD to be bulkier and heavier. The 750 watt mid drive battery is rated 444 wh and the DD is 462 wh so there is not much difference between the batteries. I think the mid drive also has a lighter frame to begin with.
 
Isn't Statorade an admission the motor has to run hot, and therefore inefficiently? The MD can find a gear to stay cool.

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It started as a product to reduce heat on motors being pushed beyond their specifications. So NO it's not an admission of anything of the sort. It has allowed those that want to push the limits of power to do so with better cooling.
 
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Justin and Grin are an amazing bunch. Real innovators in the western market. Thanks for the insights! I have 3 CA3's and two Satiators. Two of the best products on the market.

Disclaimer, I have sold Satiators.
 
It started as a product to reduce heat on motors being pushed beyond their specifications. So NO it's not an admission of anything of the sort. It has allowed those that want to push the limits of power to do so with better cooling.

Thermal Mass: The reduction in metal also meant that this motor had less ability to simply absorb the heat produced under heavy loading, resulting in a shorting time to reach overheating temperatures versus a comparable (and heavier) generic motor. This can be easily remedied with Statorade

What I wrote directly referenced this from the web page. Maybe my interpretation is wrong but there is a heat issue.

The cost is too high for me. I accept some compromises with power. You'd really want a mid drive for peak balance and efficiency.

Maybe some of the engineering will spill over. Statorade is interesting.

Can a lot of people use generic hubs? The cost is much lower. This motor competes against mid drives.

If Grin can make money from people who lace wheels, more power to them.
 
Thanks George. There's a lot of excitement over this innovation, whether we see it or not. Statoraide was an earlier innovation and made the lighter build possible. AND there is a rather large lace your own market as well as Grin lacing wheels for customers. All now out of my budget too. Actually out of my interest zone as an owner. Loading motors heavily for higher speeds does nothing for me. I'm a bit disappointed, as I've mentioned before, to see the market move in this direction. Speed kills, and brings more regulation. I like my BBSHD drive toned down, believing it will last longer and have less maintenance by running at lower amperage.

HAPPY NEW YEAR!.
 
There is no set standard for cadence that I know of that will work for everyone.
True. However, the topic of cadence has been extensively studied in all parts of the world. You actually use different sets of muscles when doing low cadence vs high cadence. And there is less tendency of fatigue at high cadence. However, it is advisable to train on both range and anywhere in between, and alternate between the two.

http://www.bikeroar.com/tips/cadence-101-nail-your-ideal-pedaling-speed

Addendum:
I have been reviewing videos of professional cyclists and also observing them as I ride along with them. The common thing I observed in all of them is their cadence is at least 90 rpm.
 
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Wow, I'm glad I stumbled upon this topic while clicking around. I'm still in research mode, reading up on as much as I can, absorbing all the information out there. (besides, I'm in a country right now where cycling is a really bad idea, not doable at all, so it I'll have to wait until I move back to Europe, ...)

I very much like the second bike, the grey one. That's spot on for what I'm aiming for/looking at. A city bike with fenders, a commuter style bicycle. And essentially a bicycle first and foremost, and an e-bike second (in looks/feel). The reason I'm glad to find this topic is that without actual testing, and just going by the info available online, you're automatically ending up at mid-drive solutions while doing research. I had it in my mind that this was the inevitable conclusion. (even if I prefer the simple engineering elegance of a hub drive).

But it seems that the typical pro-/con- lists/arguments are just too coarse and simplified, and that the differences are more subtle and not as black and white (you know the type: mid drive=more torque, leveraging the gears, opposed the typical downsides of hub drives). The way they make it look is that hub drives are the way of the past, and that everyone is, and should be, jumping on the mid drive train. Especially now that mainstream bicycle manufacturers are using the bosch and yamaha mid drive systems in a well integrated package.

But now I'm thinking that it really depends on what you want out of it, and that hub drives could be totally fine. So basically, it reaffirms to me that hub drives are a valid approach, and it will definitely make my first e-bike easier to build.

A very nice build!
 
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