Today's Forum Topics
Set as homepage
|
View
New Forum Topics Today's Forum Topics Set as homepage |
 |
|
|||||||
| |
||||
Welcome to CyclingForums.com You are currently viewing our website as a guest which gives you limited access to view most discussions. You will have to register before you can post to this thread. By joining our free online community you will have access to post new topics, communicate privately with other cyclingforums.com members (PM), respond to polls, upload photos and access other special features like product reviews and classifieds. |
|
|
Thread Tools | Search this Thread | Display Modes |
11-04.-2004, 10:29 AM
|
#1 |
|
Guest
Posts: n/a
|
rotor cranks
From reading their site (www.rotorcranks.com), it looks like one of the
crank arms is arranged at 1 o'clock while the other is in the traditional 6 o'clock. If I had a shimano octalink splined BB/cranks, could'nt I just install one of the arms incorrectly in order to achieve the same effect? The rotor cranks are >$500 and I have no idea why, what am I missing. |
|
|
11-04.-2004, 10:56 AM
|
#2 |
|
Guest
Posts: n/a
|
Re: rotor cranks
"ari" <ari@ira.com> wrote in message news:8c1ec.400$fS6.317@okepread01...
> From reading their site (www.rotorcranks.com), it looks like one of the > crank arms is arranged at 1 o'clock while the other is in the > traditional 6 o'clock. > > If I had a shimano octalink splined BB/cranks, could'nt I just install > one of the arms incorrectly in order to achieve the same effect? The > rotor cranks are >$500 and I have no idea why, what am I missing. It looks like they switch twice each time each pedal rotation so that your top foot is always slightly past 12:00 when your bottom foot is at 6:00. I'm not sure it's as far ahead as 1:00, but let's say it is. If you fixed a regular set of cranks to achieve the 1&6 position when one foot was up, they would be at a 11&6 position when the other foot was up, causing a loss in power. -- Scott Ehardt http://www.scehardt.com |
|
|
|
11-04.-2004, 02:24 PM
|
#3 |
|
Guest
Posts: n/a
|
Re: rotor cranks
On Sat, 10 Apr 2004 20:29:55 -0500, ari <ari@ira.com> may have said:
> From reading their site (www.rotorcranks.com), it looks like one of the >crank arms is arranged at 1 o'clock while the other is in the >traditional 6 o'clock. > >If I had a shimano octalink splined BB/cranks, could'nt I just install >one of the arms incorrectly in order to achieve the same effect? The >rotor cranks are >$500 and I have no idea why, what am I missing. No, the idea behind the rotor cranks is that the pedals do not work precisly in synch at all; as the BB shaft rotates, each crank's position relative to it *changes*, increasing the mechanical advantage of the leg where it supposedly can be beneficial to do so, and speeding the return of the foot to the power production point in the cycle. That's the theory. In practice, they're heavy, and they're not proven to be sufficiently beneficial to make me have the least interest in them. In particular, I have yet to see any definitive information regarding how much friction loss there is within the system itself; this could easily outweigh any supposed advantage. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
|
|
Linear Mode
