Power Crank?

Stacey said:

Has anyone seen anything on a new invention that gives the effect of a longer crank length on the
power stroke of the peddle revolution and changes it to a short crank length on the less powerful
toe lift side? I've heard a rumor, if it is true it will benefit bent riders more than anyone, we
do not use standing up to help on hills, just pure muscle. It would really help me as I just am
not able to keep a high cadence.

I'm getting the impression you're confusing Rotorcranks[1] with the outdated Biopace chain-rings
from Shimano. Please feel free to spend a lot of money in technical features if you intend so, but
none of the above will substitute proper spinning. In fact, Biopace rings make it harder to spin,
they are more appropriate for a slower cadence.

Fundamentally I'd say if you can't keep a high cadence...

- your gear is to high
- your muscles are not yet adapted for spinning

So gear down and try to pedal with less resistance as smooth as possible. Clipless pedals surely
help, they are recommended on recumbents anyway.

Don't give up to soon! Your leg muscles need time to develop the required strength, endurance and
coordination, think in months or years, not in days or weeks.

One-legged turns will help to develop the feeling for timing and motion, try it first on
slight declines.

Did I already mention you need patience for learning to spin? ;-)

Looking at Lance in TV probably will help also. Think spinning, keep training.

Regards,
Kurt

[1]www.rotorbike.com/eng/index.htm)

Discussion on BROL: pub152.ezboard.comfbentrideronlinefrm5.showMessageOpen ↗ opic

Google "power cranks". You'll get lots of hits like this: redirx.comredirx.comOpen ↗ bg

Stacey said:

Hello From Baltimore! Has anyone seen anything on a new invention that gives the effect of a
longer crank length on the power stroke of the peddle revolution and changes it to a short crank
length on the less powerful toe lift side? I've heard a rumor, if it is true it will benefit bent
riders more than anyone, we do not use standing up to help on hills, just pure muscle. It would
really help me as I just am not able to keep a high cadence. Any news is wanted! Stacey

[QUOTE]Originally posted by Bg
[B]Google "power cranks". You'll get lots of hits like this: redirx.comredirx.comOpen ↗ bg

Stacey said:

Hello From Baltimore! Has anyone seen anything on a new invention that gives the effect of a
longer crank length on the power stroke of the peddle revolution and changes it to a short crank
length on the less powerful toe lift side? I've heard a rumor, if it is true it will benefit bent
riders more than anyone, we do not use standing up to help on hills, just pure muscle. It would
really help me as I just am not able to keep a high cadence. Any news is wanted! Stacey [/B]

Recently saw something like what you asked about at www.easycrank.com The claim is 10% more
power Speedy

Stacey said:

Hello From Baltimore! Has anyone seen anything on a new invention that gives the effect of a
longer crank length on the power stroke of the peddle revolution and changes it to a short crank
length on the less powerful toe lift side? I've heard a rumor, if it is true it will benefit bent
riders more than anyone, we do not use standing up to help on hills, just pure muscle. It would
really help me as I just am not able to keep a high cadence. Any news is wanted! Stacey

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Quoted post said:

Originally posted by S. Delaire \"Ro
Recently saw something like what you asked about at www.easycrank.com The claim is 10% more
power Speedy

Stacey said:

Hello From Baltimore! Has anyone seen anything on a new invention that gives the effect of a
longer crank length on the power stroke of the peddle revolution and changes it to a short crank
length on the less powerful toe lift side? I've heard a rumor, if it is true it will benefit bent
riders more than anyone, we do not use standing up to help on hills, just pure muscle. It would
really help me as I just am not able to keep a high cadence. Any news is wanted! Stacey

-----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- newsfeeds.comnewsfeeds.comOpen ↗ - The #1
Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Note that easy crank gives more power when the pedals are within 45 degrees of level and less when more than 45 degrees from level. This is results in more peak torque with pedals near level and and less minimum torque with the pedals near vertical, extended dead spot. All this is approximately 90 degrees out of phase with RotorCranks and Biopace and this arrangement when tried with oval rings oriented for more peak peak historically increases knee problems.

Easy crank says the angle is adjustable, so maybe you could change the orientation.

Hi Anyone know how many NM torque required to tighten the shimano 105 cranks on my new Scott bike??

Thanx
D

DarrylZ said:

Hi Anyone know how many NM torque required to tighten the shimano 105 cranks on my new
Scott bike??

New Mexico?

Tom Sherman - 41 N, 90 W

Quoted post said:

Originally posted by Tom Sherman

BDarrylZ said:

Hi Anyone know how many NM torque required to tighten the shimano 105 cranks on my new
Scott bike??

New Mexico?

Tom Sherman - 41 N, 90 W [/B]

Newton-meters, metric torque unit.

meb said:

Tom Sherman said:

DarrylZ said:

Hi Anyone know how many NM torque required to tighten the shimano 105 cranks on my new Scott
bike??

New Mexico? Tom Sherman - 41 N, 90 W

Newton-meters, metric torque unit.

NM is New Mexico. N·m is the symbol for newton meter; the SI derived quantity for moment of force.

Tom Sherman - 41½ N, 90½ W

Quoted post said:

Originally posted by Tom Sherman

Bmeb said:

Tom Sherman said:

DarrylZ said:

Hi Anyone know how many NM torque required to tighten the shimano 105 cranks on my new Scott
bike??

New Mexico? Tom Sherman - 41 N, 90 W

Newton-meters, metric torque unit.

NM is New Mexico. N·m is the symbol for newton meter; the SI derived quantity for moment of force.

Tom Sherman - 41½ N, 90½ W [/B]

What's the proper abreviated capitalization for torque measured in dyne angstroms?

Are you rolling NW Tom?

meb said:

Are you rolling NW Tom?

In Illinois, you can purchase better geographical coordinates from certain state officials on the
black market. 😉

Tom Sherman - 41½ N, 90½ W

The new invention you are referring to is Luca Motion by Sascher. This elliptical pedalling motion has an effective crank length of 125mm at top and bottom of stroke and an effective crank length of 250mm at the front and back of the stroke. This creates greater power with less fatigue do to reduced knee flex. You may find more information at LucaBike.com

Quoted post said:

Originally posted by sascher
The new invention you are referring to is Luca Motion by Sascher. This elliptical pedalling motion has an effective crank length of 125mm at top and bottom of stroke and an effective crank length of 250mm at the front and back of the stroke. This creates greater power with less fatigue do to reduced knee flex. You may find more information at LucaBike.com

I was under the impression Lucabike's crank was only available on their bike. Are they selling the crank seperately?

Sascher, are you the manufacturer?

BTW, as you can see if you're following the Powercrank thread over on RBR, it might be better to discuss this crank in a thread with with a different title-else we'll likely be attracting flaming posts (in a few weeks the helmet thread may be dwarfed).

sascher said:

The new invention you are referring to is Luca Motion by Sascher. This elliptical pedalling motion
has an effective crank length of 125mm at top and bottom of stroke and an effective crank length of
250mm at the front and back of the stroke. This creates greater power with less fatigue do to
reduced knee flex. You may find more information at lucabike.comlucabike.comlucabike.comlucabike.comOpen ↗

This resembles the Kingsbury K-Drive, which they only made for their own racing bents. This
elliptical drive reduced the aero drag enough to more than compensate for the increased mechanical
drag. Any possibility of this crank being available separately in a shorter length (170mm front and
back, 40-50mm top and bottom) ?