How long before motors start incorporating gears?

R120

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#2
Yes, already being done by Continental on their bike motor. Quite a few threads on the subject, main issue at the moment is bulk and size of doing it.
 
May 30, 2019
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#3
Dont think so, what if you go beyond the speed limit or out of power. You’ll have to move the motor all by yourself.
It would also negatively influence the form factor and beside that, ...no fan of incorparating multiple drive techniques in one package (drive and gearing)
 

R120

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#4
Actually I think gearboxes are the future for all MTB's not just bikes, its long been the holy grail, because you minimise maintenance, move weight off the rear end of the bike which improves the unsprung weight and suspension performance, and allows you to build a stronger wheel due to not needing to accomodate the cassette, plus you dont have chainline issues, or a derailleur hanging off the bike just waiting to get bent in a crash

The main problem with gearbox bikes at the moment is that they weight a lot, and tend not to be able to shift under load.
 
May 30, 2019
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#5
Gearboxes and incorporating gears in a motor are different things.
The big backdraw of gearboxes is that it gives you a load of drag simply because you have to move a s**tload of sprockets and all. Why make it heavier, more complex and less efficient?
One day something will inevitably come up.....no time soon though
 

R120

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#6
your not wrong, but when someone cracks it, and makes a lightweight smooth changing gearbox then the industry will jump on it
 
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#7
your not wrong, but when someone cracks it, and makes a lightweight smooth changing gearbox then the industry will jump on it
Yep, and it will be cracked.....maybe even in our lifetime 😜
Personally think the answer may be in a CVT like solution
 

Al Boneta

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#9
I can’t wait to open a bicycle transmission/gearbox shop.
“Do you do brakes and tires?”
“Nah, we only fix the tranny”
Can’t wait to say that everyday
 

Zimmerframe

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#10
Here's a short video of the internals of the nuvinci, which is what continental have mated with their motor .. so no physical gears.


Or maybe someone will be inspired by Koenigsegg's Jesco gearbox which throws all the normal concepts in the bin and starts again so you need less gears which are doubled up in different configurations to give you more speeds.

No, I'm not suggesting you stuff a 90kg dual clutch gearbox on your MTB, that would weigh more than my 24kg Kers system .. but a simpler, considerably smaller and lighter system could be the way to go .. not even Gary in a rage has 1600hp.... maybe 1000, but not 1600 ..

 
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Huffy
#11
Revonte is an interesting one in development. Wouldn't expect it too soon. Maybe some decent models in 2023?
 
Feb 12, 2019
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Turbo levo
#12
The battery tech has to get to the point where it can offset the extra weight. Or the size of the battery is smaller to a gearbox and motor can fill part of the down tube. Would be super expensive for the materials to be light and durable. Added to that extra maintenance costs.

It's a really cool thought. If you had a hydraulic setup then you could potentially be looking at having an automatic. Most of these only have 3 gears... CVT idea is great but again maintenance is key along with the space to have the drums setup.

We ain't far away from bionic limbs so we might see this sooner!

Great post btw!
 
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Turbo levo
#13
that's what the continental motor system uses, or a variant of it

Continental Bicycle Systems - Drive Units
Should of watched that first. Joys of slow internet at the moment.

Much simpler than i thought it would be. The fine control would be that hard bit and reliability.

God it's bad enough when you mince a derailer.
 

Slowroller

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#14
I think it's inevitable, especially as motors get more torque-y. Every year motors get stronger and we're still relying on mtb drivetrains that at some point, aren't going to be up to the task. By the time you ditch all the cables, pizza pie cassettes and mech, it's only like 2 pounds more as it is now, and that is for a gearbox with a 600% range, much more than we need. I bet some clever engineers are working on integrated systems that will only be a pound and change heavier. I for one welcome our future gearbox overlords. Besides the fact that they last FOREVER, gearbox bikes ride better moving the weight to the BB.

What's The Weight Difference Between Derailleur and Pinion / Rohloff Bikes? - CyclingAbout.com

Derailleur vs Gearbox: Nicolai Ion 16 vs Ion GPI - Review - Pinkbike
 

Gary

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#15
I'd quite like them to incorporate bearings that last more than 500 miles first TBH
 

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