My mates mother in law found these lurking at the back of her attic.
Anybody know what is the idea with the arms being that shape.
Thanks..

where's the "can o'worms" pic?

I think the idea is a lack of understanding about forces and torques.

Looks like a weird marketing exercise, they'll just be heavier and probably more flexi than straight cranks. Didn't they come out around the time of Biopace chainrings?

The idea behind them is to put them on the 'Bay and watch as retrofetishists spaff their load over them!

http://www.classicrendezvous.com/Italy/PMP_crk_ad.htm

German?

iirc the spiel was that they helped you over top dead centre, because downward pressure on the pedal would then apply torque to the shorter part of the L section.
Barking 🙂

That spiel in the link is hilarious, did kaesae write it?

kenneththecurtain – Member
That spiel in the link is hilarious, did kaesae write it?

No, no mention of the BB or the grease in it!!

Wow! What utter, utter, utter twaddle !! (sez Rick)

Pedals for supporters of the Third Reich, whatever next.

Combine those with Biopace chainrings and………

Correct me if I'm wrong but the leverage on those cranks is exactly the same as if you had a straight bar to the center. Given that you're pushing around an axle (the hub) it doesn't matter what shape your leaver takes.
Basically you draw a triangle from axle to pedal and the long side is your lever (the bit they've navigated around).
So, as far as I can tell that's just more weight and utterly useless?
Physics boffins please?

I'm no boffin, but 's exactly what I thought.

Based on that theory, I'm going to take my cranks off and remount them 20' further round on the crank. Should achieve the same result.

Ahem.