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 Post subject: New pedal
PostPosted: Tue Mar 17, 2015 11:21 am 
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Joined: Mon Jul 07, 2014 8:15 am
Posts: 858
Perhaps not ideal for road bikers, but what do you people say?
http://www.cranktip.com/products/

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 Post subject: Re: New pedal
PostPosted: Tue Mar 17, 2015 11:33 am 
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Joined: Mon Jan 02, 2006 7:10 pm
Posts: 472
I say - gosh, what an original idea. Have not seen that concept before.

Bring back Biopace.


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 Post subject: Re: New pedal
Posted: Tue Mar 17, 2015 11:33 am 


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 Post subject: Re: New pedal
PostPosted: Tue Mar 17, 2015 12:03 pm 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 1099
Biopace is already back...


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 Post subject: Re: New pedal
PostPosted: Tue Mar 17, 2015 2:41 pm 
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Joined: Tue Mar 18, 2003 9:42 pm
Posts: 2211
i like the concept. but the weight must be enormous, and the pedal system is already huge & ugly. maybe good for something like race across america or ultra long distances.

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 Post subject: Re: New pedal
PostPosted: Tue Mar 17, 2015 5:52 pm 
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Joined: Thu Oct 26, 2006 8:54 pm
Posts: 460
Location: USA
I think the weight is 700g for the pair... definitely heavy. My feeling is that what's good about the design is merely the dropped platform, and that the whole parallelogram swinging part is probably snake oil. In their blurb they say that the rider is pushing downwards at 4 o'clock when the pedal wants to move backwards (because of the crank arc) and that conflicting movement leads to fatigue... yet in their diagram of how the pedal works, the platform is swung forwards at 3 o'clock, and neutral at 6 o'clock... so that means your foot is having to move backwards faster than with a normal crank (by the amount of swing). I feel like it's a contradictory argument. The whole greater leverage and torque things reminds me a bit of those ridiculous Z-torque crank things. Vista claimed something similar with the forward offset of their dropped pedal. Ok with the Cranktip there's the parallelogram part here that varies things a little bit during the stroke, but otherwise I fail to see any difference between offsetting the pedal forwards, or eg moving your cleat rearwards on your shoe...

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