Im running 175mm cranks and never had any problems at DGV.
But bear in mind that Im 195cm tall ,riding 60cm track frame and hate any race that goes shorter than 12 laps minimum.On my S2 Im running 177.5 cranks.
Crank length
-
- Posts: 345
- Joined: Sun Jul 01, 2007 9:28 pm
- Location: Sydney south
Re: Crank length
Postby Zujan » Sat Apr 03, 2010 12:25 pm
2011 Cervelo S3/SRAM Red Black/Zipp 404 T,3T Team
2010 Cervelo R3/SRAM Red, 3T Team,Fulcrum Racing 1
2010 Cervelo R3/SRAM Red, 3T Team,Fulcrum Racing 1
- Alex Simmons/RST
- Expert
- Posts: 4997
- Joined: Fri May 02, 2008 3:51 pm
- Contact:
Re: Crank length
Postby Alex Simmons/RST » Sat Apr 03, 2010 3:38 pm
I would suggest that the issues you are noticing with bike handling and feel are much more likely to be related to the frame and fork dimensions and angles, and overall bike set up, than they are with a 2.5mm difference in crank length.
-
- Posts: 46
- Joined: Fri Nov 28, 2008 7:18 am
Re: Crank length
Postby monzy » Thu Jul 08, 2010 2:28 pm
I have got an old pair of 180mm Campy Pista cranks laying about..... You must need to be a giant to ride using these!. I have never seen another pair that long...
- brentono
- Posts: 3698
- Joined: Mon Jul 13, 2009 12:33 pm
- Location: Perth DubyaEh.
Re: Crank length
Postby brentono » Thu Jul 08, 2010 3:46 pm
Got to be very rare (possibly for motorpaced useage, if they is quite old) good-onemonzy wrote:I have got an old pair of 180mm Campy Pista cranks laying about..... You must need to be a giant to ride using these!. I have never seen another pair that long...
Cheers,
BrentonO
Lone Rider- I rode on the long, dark road... before I danced under the lights.
- mikesbytes
- Super Mod
- Posts: 22179
- Joined: Thu Dec 01, 2005 11:42 pm
- Location: Tempe, Sydney
- Contact:
Re: Crank length
Postby mikesbytes » Thu Jul 08, 2010 10:39 pm
TT ?brentono wrote:Got to be very rare (possibly for motorpaced useage, if they is quite old) good-onemonzy wrote:I have got an old pair of 180mm Campy Pista cranks laying about..... You must need to be a giant to ride using these!. I have never seen another pair that long...
Cheers,
BrentonO
If the R-1 rule is broken, what happens to N+1?
- brentono
- Posts: 3698
- Joined: Mon Jul 13, 2009 12:33 pm
- Location: Perth DubyaEh.
Re: Crank length
Postby brentono » Fri Jul 09, 2010 4:50 pm
On TT?
gave them a rolling advantage, at least that was the thought, as I observed and was told from the competitors,
at the World M.P. Champs... behind the Harleys for the last time (as far as I know)
Hope that helps,
Cheers,
BrentonO
I mention M.P. because (back in the day, B.C.) they rode such huge gears, the thought was that the very long cranks,At the Serotta International Cycling Institute Science Symposium, Jim Martin, Ph.D.,
from the University of Utah presented his study of crank length.
Attention: Time Trialists
Martin's study has a specific application for time trialists. Traditionally, TT specialists switch to 2.5- or 5-mm longer cranks for races against the clock, believing that greater length provides more leverage to push big gears during a time trial’s steady application of force.
However, Martin argues that because crank length doesn’t affect power production, time trialists should use the shortest commercially available crankarms -- 165 mm. This will let them have a lower and, therefore, more aerodynamic position that's likely to result in a faster ride.
After all, long cranks are longer not only on the downstroke but also at the top of the stroke where, in a time trial position on aerobars, the rider’s thighs tend to hit the chest. The longer the crank, the more the chest must be elevated, thus increasing frontal area and wind drag.
So with short cranks, a rider can get the chest lower without leg interference. The importance of a low frontal area in time trials is unquestioned. Pro teams spend thousands of dollars for wind tunnel research so they can determine the lowest and fastest position for their riders without compromising power. But they do it on bikes with long crankarms -- often even longer than normal.
Thanks to Martin’s new study, we now have new knowledge: Short crankarms allow a lower aero position
without compromising wattage output.
gave them a rolling advantage, at least that was the thought, as I observed and was told from the competitors,
at the World M.P. Champs... behind the Harleys for the last time (as far as I know)
Hope that helps,
Cheers,
BrentonO
Lone Rider- I rode on the long, dark road... before I danced under the lights.
-
- Posts: 10329
- Joined: Thu Sep 18, 2008 12:10 pm
- Location: Sydney
Re: Crank length
Postby Nobody » Fri Jul 09, 2010 6:45 pm
Have you got an online link for the above information?brentono wrote:On TT?I mention M.P. because (back in the day, B.C.) they rode such huge gears, the thought was that the very long cranks,At the Serotta International Cycling Institute Science Symposium, Jim Martin, Ph.D.,
from the University of Utah presented his study of crank length.
Attention: Time Trialists
Martin's study has a specific application for time trialists. Traditionally, TT specialists switch to 2.5- or 5-mm longer cranks for races against the clock, believing that greater length provides more leverage to push big gears during a time trial’s steady application of force.
However, Martin argues that because crank length doesn’t affect power production, time trialists should use the shortest commercially available crankarms -- 165 mm. This will let them have a lower and, therefore, more aerodynamic position that's likely to result in a faster ride.
After all, long cranks are longer not only on the downstroke but also at the top of the stroke where, in a time trial position on aerobars, the rider’s thighs tend to hit the chest. The longer the crank, the more the chest must be elevated, thus increasing frontal area and wind drag.
So with short cranks, a rider can get the chest lower without leg interference. The importance of a low frontal area in time trials is unquestioned. Pro teams spend thousands of dollars for wind tunnel research so they can determine the lowest and fastest position for their riders without compromising power. But they do it on bikes with long crankarms -- often even longer than normal.
Thanks to Martin’s new study, we now have new knowledge: Short crankarms allow a lower aero position
without compromising wattage output.
gave them a rolling advantage, at least that was the thought, as I observed and was told from the competitors,
at the World M.P. Champs... behind the Harleys for the last time (as far as I know)
Hope that helps,
Cheers,
BrentonO
- brentono
- Posts: 3698
- Joined: Mon Jul 13, 2009 12:33 pm
- Location: Perth DubyaEh.
Re: Crank length
Postby brentono » Sat Jul 10, 2010 2:54 pm
Nobody, DYOR
At the Serotta International Cycling Institute Science Symposium, Jim Martin, Ph.D.,
from the University of Utah presented his study of crank length.
And (below)- Here's a PDF link with much of the info...
http://www.plan2peak.com/files/32_artic ... hnique.pdf
Jim Martin is a cycliing enthusiast, a bicycle racer, holds a PhD in exercise science
and an undergrad degree in mechanical engineering.
He's a professor at the University of Utah and is as august an academic on the subject of crank length as anyone.
Here's a paper of his on it...
http://www.ncbi.nlm.nih.gov/pubmed/11417428
That will get you started, and next you could even try "Google"
Good Luck
Cheers,
BrentonO
At the Serotta International Cycling Institute Science Symposium, Jim Martin, Ph.D.,
from the University of Utah presented his study of crank length.
http://www.serottacyclinginstitute.com/ ... ctures.htmMyth and Science in Cycling: Crank Length and Pedaling Technique - Jim Martin, PhD.
During this provocative presentation, Dr. Martin will discuss several position and equipment strategies
to improve cycling performance and whether there is any scientific evidence that they actually meet
the stated objective of going faster.
And (below)- Here's a PDF link with much of the info...
http://www.plan2peak.com/files/32_artic ... hnique.pdf
Jim Martin is a cycliing enthusiast, a bicycle racer, holds a PhD in exercise science
and an undergrad degree in mechanical engineering.
He's a professor at the University of Utah and is as august an academic on the subject of crank length as anyone.
Here's a paper of his on it...
http://www.ncbi.nlm.nih.gov/pubmed/11417428
That will get you started, and next you could even try "Google"
Good Luck
Cheers,
BrentonO
Lone Rider- I rode on the long, dark road... before I danced under the lights.
-
- Posts: 10329
- Joined: Thu Sep 18, 2008 12:10 pm
- Location: Sydney
Re: Crank length
Postby Nobody » Sat Jul 10, 2010 8:34 pm
Thanks BrentonO.
That PDF file was the most informative document on crank length and pedaling I've ever read.
That PDF file was the most informative document on crank length and pedaling I've ever read.
- brentono
- Posts: 3698
- Joined: Mon Jul 13, 2009 12:33 pm
- Location: Perth DubyaEh.
Re: Crank length
Postby brentono » Sun Jul 11, 2010 11:42 am
No worries, helps dispell a lot of myths that are floating around, hope many others may gain from it, as wellNobody wrote:Thanks BrentonO.
That PDF file was the most informative document on crank length and pedaling I've ever read.
Cheers,
BrentonO
Lone Rider- I rode on the long, dark road... before I danced under the lights.
Jump to
- General Australian Cycling Topics
- Info / announcements
- Buying a bike / parts
- General Cycling Discussion
- The Bike Shed
- Cycling Health
- Cycling Safety and Advocacy
- Women's Cycling
- Bike & Gear Reviews
- Cycling Trade
- Stolen Bikes
- Bicycle FAQs
- The Market Place
- Member to Member Bike and Gear Sales
- Want to Buy, Group Buy, Swap
- My Bikes or Gear Elsewhere
- Serious Biking
- Audax / Randonneuring
- Retro biking
- Commuting
- MTB
- Recumbents
- Fixed Gear/ Single Speed
- Track
- Electric Bicycles
- Cyclocross and Gravel Grinding
- Dragsters / Lowriders / Cruisers
- Children's Bikes
- Cargo Bikes and Utility Cycling
- Road Racing
- Road Biking
- Training
- Time Trial
- Triathlon
- International and National Tours and Events
- Cycle Touring
- Touring Australia
- Touring Overseas
- Touring Bikes and Equipment
- Australia
- Western Australia
- New South Wales
- Queensland
- South Australia
- Victoria
- ACT
- Tasmania
- Northern Territory
- Country & Regional
Who is online
Users browsing this forum: No registered users
- All times are UTC+10:00
- Top
- Delete cookies
About the Australian Cycling Forums
The Australian Cycling Forums is a welcoming community where you can ask questions and talk about the type of bikes and cycling topics you like.
Bicycles Network Australia
Forum Information
Connect with BNA
Brought to you by Bicycles Network Australia | © 1999 - 2024 | Powered by phpBB ®
This website uses affiliate links to retail platforms including ebay, amazon, proviz and ribble.
This website uses affiliate links to retail platforms including ebay, amazon, proviz and ribble.