Rohloff E-14 is now compatible with Panasonic E-bike drive system

smorgasbord

Well-Known Member
Region
USA
Am I seeing this right?

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Shifting mechanism on the BRAKE side?
With a special 4-bolt brake disc?
Why?


BTW, can't resist showing the "Overview" page link takes you to this headline:
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Which Google translates to:

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So, who says the Germans don't know how to have fun?
 

Ravi Kempaiah

Well-Known Member
Shifting mechanism on the BRAKE side?
With a special 4-bolt brake disc?
Why?

Rohloff hub has always had shifting on the non-drive side.
Drive side is pure dedicated to the power transmission while the non-drive side can be utilized for shifting mechanism. Combining both on the same side would be quite difficult and engineering both power transmission and shifting may need redesign of Rohloff itself. I know Enviolo does it but Rohloff has always had it on the non-drive side.

Why 4 instead of 6 bolts. Well, you would want to avoid drilling too many holes. I will check with them if they have plans to adapt to centerlock mechanism in the future.
 

JRA

Well-Known Member
Kent International that have Van Dessel and Univega brands feature some models with the GXO Panasonic system, although I have never seen one for sale anywhere. No sign of a Rohloff in their lineup but there was a thread on here awhile back that had additional info.


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smorgasbord

Well-Known Member
Region
USA
I know Enviolo does it but Rohloff has always had it on the non-drive side.

Interesting - yeah, my previous experience has been with the Nuvinci enviolo.
If you heat up that rear disk, might the radiant heat interfere with with shift mechanism, which is encased in plastic? Rotors can get really hot.
 

Ravi Kempaiah

Well-Known Member
If you heat up that rear disk, might the radiant heat interfere with with shift mechanism, which is encased in plastic? Rotors can get really hot.

I have a 3D model of the Rohloff hub and I just measured the distance between the rotor and the shifter.
We have about ~ 30 mm distance between the hub shell and rotor and ~10mm distance between the rotor and the shifter box. And air in between: air is an excellent insulator. I would not worry about rotor heat getting transmitted to the shifter box via air.


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smorgasbord

Well-Known Member
Region
USA
I have a 3D model of the Rohloff hub and I just measured the distance between the rotor and the shifter. We have about ~ 30 mm distance and air in between.
Air is an excellent insulator and I would not worry about rotor heating getting transmitted to the shifter box via air.

That's true for conduction, but not for radiation. You can sit 10 feet from a fire and feel the heat just fine.

For conduction, rotors have been designed like frying pans, where small cross-sections don't transfer the heat. But again, there's still radiant heat to contend with, I would think.
 

Ravi Kempaiah

Well-Known Member
For conduction, rotors have been designed like frying pans, where small cross-sections don't transfer the heat.

Ok, whether it is the Nuvinci or the Derailleur bike you have, after a mile long descent, could you post an IR thermo image of the rotor at time zero, 30 seconds and 40 seconds?

This will help us understand how hot rotor gets and if that affects anything.
 

smorgasbord

Well-Known Member
Region
USA
From the cold in Finland:
90 degrees Celsius for FRONT

Rear will normally be lower, but note this is for just one braking occurrence. On an off-road downhill ride, you can be on the brakes again and again and again.