classified hub plus 1x12

[mschwett]

no love for TRP from me, but this integration with the powerhub is a fantastic idea. really gets close to the benefits of a 2x drivetrain without the drawbacks and extra bits. haven't heard what the rated torque of the hub is, but classified claims it can shift under 1,000 watts of load.

TRP x Classified Launch Vistar Wireless 1x16 Drivetrain!

The new Classified Vistar // Powershift road & gravel drivetrain has more gear range than MTB groups and automatic gear selection!

bikerumor.com

 

[PCeBiker]

I think that someone should wrap a hub motor around a two or three speed geared hub.

Three-speed geared hub with 12-speed cassette.

You'd still have 520% gear range, but the hub motor would have three speeds for uphill, downhill and level ground.

 

[mschwett]

I think that someone should wrap a hub motor around a two or three speed geared hub.

Three-speed geared hub with 21-speed cassette.

i wonder what the inside of the powershift looks like, and how easily one could integrate it to a geared motor. ideally there are some efficiencies in combining either the structure or workings of the geared hub motor with the geared hub...

 

[mschwett]

i do see some speculation that it's only about 96% efficient, which when combined with the derailleur drivetrain, gets you into pretty low (pinion like lol) territory...

(this from

- take it for what it's worth)

 

[PCeBiker]

A geared hub motor is already geared to around 5:1
They could just add a couple more gears. Low speed and high speed.
Efficiency isn't quite as important because it's powered and hub motors already have inefficiency from the gearing.

Perhaps the drop in efficiency of two more gears inside would be offset by the efficiency gained by getting the motor to a more efficient RPM?

 

[PCeBiker]

I just found this,..

https://a.aliexpress.com/_mKHGTpa

And this,..

https://a.aliexpress.com/_m0DUMgM

Somebody needs to combine the two.

It would be a complete 3-speed rear hub motor that would install on any rear hub bike.

A standard old school heavy duty 6-speed drive line would be enough if the hub is geared, especially if there is no overlap of the gear ratios, to get an 18-speed.

No complicated electronics running the system, just an extra mechanical control for the three speed hub.
Leave it in second gear for level riding, first gear for uphill, pulling a load or into the wind, and third gear downhill or a tailwind.

Direct drive motors are thinner and taller, so lots of room for the IGH inside.


I've got a hole saw and a welder.
l might have to try to make one myself?

The beauty is in the simplicity.
It's all off-the-shelf components.