IGH directly powered by cranks
#1
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IGH directly powered by cranks
Recently I came across Kervelo's Kernel hub, an IGH on a wheel which can be directly powered by cranks.
https://www.kervelo.com/transmission...ub-kernel-hub/
Wondering if there were similar other products out there I tried googling gearing for Penny Farthings, and stumbled on Bicymple's Penny Farthing, which comes with a 2 speed IGH integrated into the drive wheel. Though I can't seem to find out the make or model.
I know Pinion drives have been around for a while, but this is new to me.
Does anyone know of similar products by the well-known brands: Shimano, Sturmey Archer and the like?
https://www.kervelo.com/transmission...ub-kernel-hub/
Wondering if there were similar other products out there I tried googling gearing for Penny Farthings, and stumbled on Bicymple's Penny Farthing, which comes with a 2 speed IGH integrated into the drive wheel. Though I can't seem to find out the make or model.
I know Pinion drives have been around for a while, but this is new to me.
Does anyone know of similar products by the well-known brands: Shimano, Sturmey Archer and the like?
#3
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Schlumpf 2-speed unicycle hub:
https://krisholm.com/en/gear/component/kh-schlumpf
https://krisholm.com/en/gear/component/kh-schlumpf
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Great looking hub and bicycles.
I'm not a penny farthing kind of guy, but if I were I'd consider adding that hub to one. Maybe the 4 speed.
I'm not a penny farthing kind of guy, but if I were I'd consider adding that hub to one. Maybe the 4 speed.
#5
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Schlumpf 2-speed unicycle hub:
https://krisholm.com/en/gear/component/kh-schlumpf
https://krisholm.com/en/gear/component/kh-schlumpf
#6
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I'm not terribly impressed by the Kervelo bikes actually as they seem to show slight wobbling in the few videos available. More so than in other recumbents I've seen anyway. Perhaps some frame refinement still needs to be made.
Edit: I stand corrected on my previous statement as this video shows the Tourer model to be quite stable. Probably stability issues have been ironed out by now.
Last edited by Shahmatt; 08-26-19 at 07:56 PM.
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#8
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#10
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Looking at the specs of the hub, it seems to me the wheel size could not be varied much for practical application as there is no intermediate cog.
First gear ratio is = 1.52
Fastest gear ratio = 0.28
I wonder how that translates to gear inches.
First gear ratio is = 1.52
Fastest gear ratio = 0.28
I wonder how that translates to gear inches.
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Any news about the Kervelo hubs? I contacted them on their website, Facebook and Linkedin, but absolutely no reaction.
Another 2-speed IGH kernel hub at www mc2bike dot com (newbies cannot post URLs (
The bicymple penny farthing uses a 2-speed, freewheeling Schlumpf hub.
Are Schlump hubs freewheeling by default? Or does bicymple use some custom-made Schlump hub?
Please let me know if you have any recent news about Kervelo.
Another 2-speed IGH kernel hub at www mc2bike dot com (newbies cannot post URLs (
The bicymple penny farthing uses a 2-speed, freewheeling Schlumpf hub.
Are Schlump hubs freewheeling by default? Or does bicymple use some custom-made Schlump hub?
Please let me know if you have any recent news about Kervelo.
#12
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I know Pinion drives have been around for a while, but this is new to me.
Does anyone know of similar products
Does anyone know of similar products
Last edited by tcs; 12-07-19 at 09:50 AM.
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There are other threads about crank gear boxes.
ats sells licenced copies of schlumpf
Welcome to ATS
paterson. I think FSA sells licenced copies.
https://www.pattersonbike.com/
Efneo
Efneo 3-speed front bicycle Gearbox
Schlumpf mountain makes more sense since the high gear is 1:1 where you will be at most of the time. The others use overdrive so you will have less efficiency most of the time. It's 2.5 while the others are 1.65 or 1.75
https://www.schlumpfdrive.com/index.php/mountain-drive.html
But what I don't like is the wide q factor and sometimes no option for shorter crank arm length. Double chainring would give more options
ats sells licenced copies of schlumpf
Welcome to ATS
paterson. I think FSA sells licenced copies.
https://www.pattersonbike.com/
Efneo
Efneo 3-speed front bicycle Gearbox
Schlumpf mountain makes more sense since the high gear is 1:1 where you will be at most of the time. The others use overdrive so you will have less efficiency most of the time. It's 2.5 while the others are 1.65 or 1.75
https://www.schlumpfdrive.com/index.php/mountain-drive.html
But what I don't like is the wide q factor and sometimes no option for shorter crank arm length. Double chainring would give more options
Last edited by tomtomtom123; 12-07-19 at 04:58 AM.