Sturmey Archer combine e-motor and 5s hub

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Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Sturmey Archer combine e-motor and 5s hub

Postby Brucey » 2 Feb 2019, 9:26pm

in 2017 this was announced;

Image

https://cyclingindustry.news/sunrace-sturmey-archer-create-5-speed-motor-gear-hub-for-accell/

This motor/hub is (IMHO) a clever approach, because (unlike BB motors such as shimano steps) it does not pass the motor loadings though the IGH. It also appears to use the same internal as other 'C50' type SA 5s hubs, with mainly modifications to the hubshell. Asides from front wheel motors and clip-on rear motors this is the first time you can get a direct drive motor with an IGH. Downsides include that the range of sprockets to fit this hub (which has an oversize driver spline) does not include small ones, so if you want to go very fast you will have to pedal like fury or fit a huge chainring.

I expected to see this unit on Batavus and Sparta branded bikes, amongst others, but have not yet seen one in the flesh. Anyone have any experience?

cheers
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rjb
Posts: 3058
Joined: 11 Jan 2007, 10:25am
Location: Somerset (originally 60/70's Plymouth)

Re: Sturmey Archer combine e-motor and 5s hub

Postby rjb » 3 Feb 2019, 8:36am

That's nice, its too much to expect that I could remove the dynamo and replace it with this motor on my 3 spd Sturmey dynohub :D
At the last count:- Focus Variado, Peugeot 531 pro, Dawes Discovery Tandem, 2 Dawes Kingpins, Raleigh 20, Falcon K2 MTB dropped bar tourer, On One Pompino, Longstaff trike conversion on a Falcon corsa. :D

Bonefishblues
Posts: 5274
Joined: 7 Jul 2014, 9:45pm
Location: Near Bicester Oxon

Re: Sturmey Archer combine e-motor and 5s hub

Postby Bonefishblues » 3 Feb 2019, 8:51am

40nm of torque seems adequate to me :D

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[XAP]Bob
Posts: 16752
Joined: 26 Sep 2008, 4:12pm

Re: Sturmey Archer combine e-motor and 5s hub

Postby [XAP]Bob » 3 Feb 2019, 9:00pm

242% - that’s 12-30 teeth equivalent.
Not too shabby.
Didn’t see any clues as to the positioning of the range though - is it all up like the 8 speed,!or direct drive in the middle somewhere?
A shortcut has to be a challenge, otherwise it would just be the way. No situation is so dire that panic cannot make it worse.
There are two kinds of people in this world: those can extrapolate from incomplete data.

Brucey
Posts: 32274
Joined: 4 Jan 2012, 6:25pm

Re: Sturmey Archer combine e-motor and 5s hub

Postby Brucey » 3 Feb 2019, 9:31pm

if the 5s gear is like the other C50 type hubs then the middle gear is direct drive.

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~