Interesting old crank design.

[choke]

Originally Posted by sales guy

This isn't that old of a design.

Crankarms with an offset go back at least to the 1930s... http://pardo.net/bike/pic/mobi/d.pmp-cranks/

[Mark McM]

Originally Posted by Cicli

Saw these PMP cranks in an old article. Interesting, even if they didnt work. Kind if cool though. Maybe they would have worked better if they were carbon.
There was the Z-Force also. These were earlier though.

No, no, no, they've got it all wrong! They've got the bend in the wrong direction! Everybody knows that to increase power and efficiency they need to have the bend in the other direction!

[choke]

I don't know why I didn't think of this one until just now...the Interdrive crank.

[54ny77]

Is this the SMS crank?

[dgauthier]

These certainly are "old crank designs". They all look like they were designed by an old crank.

[sales guy]

Originally Posted by David Tollefson

And then there is this...
http://www.velonews.com/2013/09/bike...rankset_301441

And this one that's a little difficult to see, but it didn't seem to slow her down much:

I used to work on Paula's bikes. Her and a bunch of other pros-Mike Pigg, Karen Smyers, Peter Reid, Lori Bowden and a bunch of others. It was fun with tri people. I was into it then and working for Cevelo. Used to run and ride with them all the time. Swimming, not so much. I could never keep up with them.

[cadence90]

I just heard today that PMP has been sold to another Italian company, and that new ownership will be reducing the production of a lot of their products.

Bummer.

[avalonracing]

Manx Crank?

[sales guy]

Originally Posted by avalonracing

Manx Crank?

I believe it's "if you're not a Manc you're a wank!"

[fiamme red]

http://road.cc/content/feature/18125...-just-wont-die

[tombtfslpk]

Kinda reminds me of the stem length/handlebar width debates of folks with MTB's.

[MattTuck]

PMP.... what, am I ordering cranks from hot truck now?


sorry, probably no one will get that.

[cachagua]

Originally Posted by Mark McM

No, no, no, they've got it all wrong! They've got the bend in the wrong direction! Everybody knows that to increase power and efficiency they need to have the bend in the other direction!

Right, because if it bends that way it'll cause your frame flex to push your foot down in front, instead of pushing it up in the rear.

Wait, wait, all you'd have to do is mount them on the opposite sides, wouldn't you?

And then pedal backwards?

I'm getting dizzy.

[GOTHBROOKS]

there are some nos houdaille industries power cams in the display case at the shop. ive always wanted to try them.

[Mark McM]

Originally Posted by GOTHBROOKS

there are some nos houdaille industries power cams in the display case at the shop. ive always wanted to try them.

I immediately though of the Houdaille Power Cam cranks when I first say the Rotor RS-4 cranks. The Rotor cranks also used a BB mounted cam, but for a different reason: On the Rotor cranks, the two crank arms move out of phase with each other, with one arm moving faster or slower than the other arm during different phases of the circle.