So Pete Jacobs is riding with these Cranktip Cranks at Oceanside. This just looks like an over engineered oval chainring.
Pics here (start at #5) http://triathlon.competitor.com/2014/03/photos/pro-bike-pete-jacobs_96088
This is the first time I’ve heard of them. Their website simply says “coming soon”.
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I don’t even know what to say about this…I wouldn’t ride with them
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I don’t even know what to say about this…I wouldn’t ride with them
I 2nd this. Thats just too much.
Please, someone. If there is any advantage to the extra armature, then great. But why bother with all that crap out the back? Surely you only require the shortest route from spindle to tip of crank?
“changes the crank length at different points?”
Shorter at the top and longer through the power phase? *could open the hip angle like short crankarms while still giving the leverage of longer cranks.
Still looks pretty weird.
These remind me of the special pedals Paula Newby Fraser sported for a while “back in the day”.
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Another “Solution in search of a problem” it seems. Looks like that would add a fair amount of additional power loss from friction with such a large contact area your sliding across. I se the point as mentioned, the benefit of longer cranks but retaining and open hip angle across the top. Considering the rider’s ability, maybe Jacobs believes it would allow him to ride harder, yet still run well.
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It does add some new sources of frictional losses, probably half a watt to a watt minimum.
Also adds a lot of q-factor unless I am mistaken, which would add aerodynamic losses.
On the upside though, you get…well you get nothing. Leverage doesn’t get you free power, and your bike already has adjustable leverage.
Never forget - leverage doesn’t get you free power. Yes, you can move a planet with your finger with enough leverage. But you will be moving it very slowly =)
Another “Solution in search of a problem” it seems. Looks like that would add a fair amount of additional power loss from friction with such a large contact area your sliding across. I se the point as mentioned, the benefit of longer cranks but retaining and open hip angle across the top. Considering the rider’s ability, maybe Jacobs believes it would allow him to ride harder, yet still run well.
yeah, essentially the pedals are still travelling in a complete circle, but it is shifted forward and down, how much, not sure. so you get extra leverage from say 2-8 and less from 8-2. you also get less ground clearance, so hopefully you don’t like pedaling through corners. this means you have essentially slackened you seat angle. probably creating as many issues as you are purporting to fix