This may sound like a stupid question but is there anyway to get some type of internally geared hub that can be hooked up to a mid drive AND have TWO separate freewheels (one for pedals,one for mid drive AND a disc brake?....also it would be nice to try and get a long axle to fit a wider frame to accommodate double freewheels
geared hub with two individual freewheels?
- Thread starter korpin
- Start date
spinningmagnets
100 TW
Put the non-hub motor driving the freewheel closest to the rear wheel, with the human-driven freewheel on the outer edge. You might need a steel frame to be able to safely spread the drop-outs enough to fit them, fit depends on several factors.
"Mounting TWO freewheels on one rear wheel hub"
http://www.endless-sphere.com/forums/viewtopic.php?f=28&t=13862
"Mounting TWO freewheels on one rear wheel hub"
http://www.endless-sphere.com/forums/viewtopic.php?f=28&t=13862
I THOUGHT I already posted this but wondering if anyone ever came up with a solution for a geared hub that could be used with a mid drive that would hold up and could except two freewheels?...I see posts where people used SRAM,Sturmey Archer,and Shimano geared hubs but they all seem to have failed....anybody put dual freewheels on Rholloff or Nuvinci?
yawstick
100 W
I've been looking at this NuVinci drive http://www.utahtrikes.com/PRODINFO-Nuvinci_Developer_Kit.html wondering if it could be used in a mid drive arrangement. The price is certainly pretty good. Hard to tell from the pics but it looks like it has a disc brake mount on the one side. I was wondering if it could be used with a toothed belt drive on the disc brake side and used in reverse and take the output from the other side. It says it only works in one direction but I wonder if thats not because of the freewheel.... that would normally be the input. If you were using it as the output side driving the left side of the bike / trike with normal chain drive on the right side... ie the motor would drive left side thru NuVinci and and normal pedal drive on the right.
Curious if anyone has had their hands on one of these and if this is doable.... I'm assuming the one way operation is because of the freewheel and not something else internal to the drive. Also wonder if this would not reverse your gearing. Meaning the ratios state .5 underdrive to 1.75 overdrive... I would think this would be reversed if it could indeed be used in the opposite direction.
Curious if anyone has had their hands on one of these and if this is doable.... I'm assuming the one way operation is because of the freewheel and not something else internal to the drive. Also wonder if this would not reverse your gearing. Meaning the ratios state .5 underdrive to 1.75 overdrive... I would think this would be reversed if it could indeed be used in the opposite direction.
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- Feb 15, 2013
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[youtube]-UnMvqcAeeE[/youtube]
"Ebike utilizes motor and a single chain reduction to a Sram Dual Drive 3 Speed Hub. A parallel Hybrid Bicycle Pedal Chain Also Connects to the 3 speeds in common with the motor with separate freewheels on the wheel hub.." http://youtu.be/-UnMvqcAeeE
Nuvinci rear hub transmission with mid-drive crank concentric motor with dual freewheel & reduction jackshaft.. : http://endless-sphere.com/forums/viewtopic.php?f=3&t=54086
crank concentric geared mid-drive.. : http://endless-sphere.com/forums/viewtopic.php?f=28&t=56037&p=834628
"Ebike utilizes motor and a single chain reduction to a Sram Dual Drive 3 Speed Hub. A parallel Hybrid Bicycle Pedal Chain Also Connects to the 3 speeds in common with the motor with separate freewheels on the wheel hub.." http://youtu.be/-UnMvqcAeeE
Nuvinci rear hub transmission with mid-drive crank concentric motor with dual freewheel & reduction jackshaft.. : http://endless-sphere.com/forums/viewtopic.php?f=3&t=54086
crank concentric geared mid-drive.. : http://endless-sphere.com/forums/viewtopic.php?f=28&t=56037&p=834628
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