Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Track Cycling: Velodrome Racing and Training Area Looking to enter into the realm of track racing? Want to share your experiences and tactics for riding on a velodrome? The Track Cycling forums is for you! Come in and discuss training/racing, equipment, and current track cycling events.

Reply
 
Thread Tools Search this Thread
Old 06-19-11, 09:45 AM   #1
thisisbenji
Senior Member
Thread Starter
 
thisisbenji's Avatar
 
Join Date: May 2010
Location: Wadsworth, IL
Bikes: Motobecane Vent Noir, Specialized Crux, Specialized Carve
Posts: 423
Crank Length

I know this has been talked about here before, but I can't seem to find what I'm looking for. Currently I'm running 170s on both my track bike and my road bike. I'm always seeing all of this stuff on here about people running 165s on their track bikes, or maybe just fixies? Anyways I was thinking about getting some new cranks and was wondering if there was actually an advantage of running 165s vs 170s while racing on the velodrome. (I don't ride my track bike on the street. That's what the road bike is for.)

I'm 5'6", I believe I have a 30 inch inseam, and I'm riding a 49cm Motobecane Track which I believe is very similar to the Fuji Track Classic.
thisisbenji is offline   Reply With Quote
Old 06-19-11, 11:32 AM   #2
Kayce
Senior Member
 
Kayce's Avatar
 
Join Date: Aug 2010
Location: St Louis
Bikes:
Posts: 1,846
As long as you feel comfortable on your bike, and arent having pedal strike I would say stick with what you have. Those two are pretty important when it comes to crank length, everything else is all about guessing and science in a vacuum.
Kayce is offline   Reply With Quote
Old 06-19-11, 01:22 PM   #3
thisisbenji
Senior Member
Thread Starter
 
thisisbenji's Avatar
 
Join Date: May 2010
Location: Wadsworth, IL
Bikes: Motobecane Vent Noir, Specialized Crux, Specialized Carve
Posts: 423
Thanks, that's kind of what I was thinking. I actually found a pair of 165mm cranks (some cheap ones) in my spare parts bin today. I'm gonna put them on and just see what it feels like.
thisisbenji is offline   Reply With Quote
Old 06-19-11, 01:50 PM   #4
Kayce
Senior Member
 
Kayce's Avatar
 
Join Date: Aug 2010
Location: St Louis
Bikes:
Posts: 1,846
I dont know if Id do that. It would definatly require raising the seat, probably adjusting it front to back, and maybe moving the bars around. If you realyl want to try it out Id wait till the off season so you have lots of time to play.
Kayce is offline   Reply With Quote
Old 06-19-11, 03:38 PM   #5
carleton
Elitist
 
carleton's Avatar
 
Join Date: Jul 2005
Location: Atlanta, GA
Bikes:
Posts: 13,015
Quote:
Originally Posted by thisisbenji View Post
I know this has been talked about here before, but I can't seem to find what I'm looking for. Currently I'm running 170s on both my track bike and my road bike. I'm always seeing all of this stuff on here about people running 165s on their track bikes, or maybe just fixies? Anyways I was thinking about getting some new cranks and was wondering if there was actually an advantage of running 165s vs 170s while racing on the velodrome. (I don't ride my track bike on the street. That's what the road bike is for.)

I'm 5'6", I believe I have a 30 inch inseam, and I'm riding a 49cm Motobecane Track which I believe is very similar to the Fuji Track Classic.
Have a look in here: http://www.bikeforums.net/showthread...-bike-frame-up

I'd suggest 165mm based on your height and not knowing about your riding style.
__________________
Quote:
Originally Posted by gtrob View Post
Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.
carleton is offline   Reply With Quote
Old 06-19-11, 06:27 PM   #6
Baby Puke
Senior Member
 
Join Date: Sep 2008
Location: San Francisco, CA
Bikes: Marin Stelvio, Pogliaghi SL, Panasonic NJS, Dolan DF3, Intense Pro24 BMX
Posts: 1,000
If you try the 165s, I would suggest not raising the saddle, but moving it back a little.
Baby Puke is offline   Reply With Quote
Old 06-19-11, 07:15 PM   #7
thisisbenji
Senior Member
Thread Starter
 
thisisbenji's Avatar
 
Join Date: May 2010
Location: Wadsworth, IL
Bikes: Motobecane Vent Noir, Specialized Crux, Specialized Carve
Posts: 423
Quote:
Originally Posted by carleton View Post
Have a look in here: http://www.bikeforums.net/showthread...-bike-frame-up

I'd suggest 165mm based on your height and not knowing about your riding style.
Hmmm.... well I put them on there, still need to adjust the saddle. I'm gonna give it a try tomorrow, I'm going to a training ride at the track, so it'll be a good test. Btw, I tend to lean towards the higher cadences on my road bike. Not to sure what I hit on the track bike as I don't have a cadence sensor on it. But when I TT on my road bike I tend to ride in between 110 - 120 rpm. I guess I'll just have to find out myself how it feels, I'm just worried about not setting my saddle properly and feeling more of a difference from that then the cranks.
thisisbenji is offline   Reply With Quote
Old 06-19-11, 07:33 PM   #8
carleton
Elitist
 
carleton's Avatar
 
Join Date: Jul 2005
Location: Atlanta, GA
Bikes:
Posts: 13,015
Don't sweat the saddle height.

The 5mm shorter cranks will give less leg extension (making your saddle feel lower). But people often ride with slightly less leg extension on the track, so it might net out to the same as far as seat post extension.
__________________
Quote:
Originally Posted by gtrob View Post
Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.
carleton is offline   Reply With Quote
Old 06-19-11, 07:35 PM   #9
bitingduck
Senior Member
 
bitingduck's Avatar
 
Join Date: Jan 2005
Bikes:
Posts: 3,054
Depends on the track and the type of racing you do. If you're riding MTV, Northbrook, or Kenosha, you can probably ride pretty much anything for anything.

Home Depot Center is 46 degrees and doesn't restrict crank length-- we have people riding anything from ~150 (kids) to 175 (mostly pursuiters) and one guy riding custom 190s or something (crazy long enough that it actually looks weird). If you're on long cranks on a steep track you just have to be aware of how it may limit your riding-- I've tapped a pedal on the banking at Blaine with 165s and not gone down. I don't think I've ever seen anyone at HDC touch a pedal to the track without being on their way down already-- the wood is less grainy and ends up being effectively slipperier than at Blaine. If you're riding a lot of match sprints on steep tracks you probably want to be on the shorter side, though there's a lot less low speed stuff in sprints these days. I have a friend who rides 175s in a big gear on his pursuit bike at HDC, and when we're at the balustrade together I have to keep the speed up higher if he's behind me and we're supposed to be in zone 1 or 2.
__________________
Track - the other off-road
http://www.lavelodrome.org
bitingduck is offline   Reply With Quote
Old 06-20-11, 09:41 AM   #10
chas58
Senior Member
 
chas58's Avatar
 
Join Date: Jul 2010
Location: Michigan
Bikes: too many of all kinds
Posts: 1,570
Pedal strike is a combination of track angle, crank length and BB height. You really need to know all of those to know if there is going to be a problem. If you are averageing 110-120, then you should be hitting near 150 in the sprints (dependant on your gearing and style). It sounds like 165 would be good for you.
chas58 is offline   Reply With Quote
Old 06-20-11, 11:58 AM   #11
thisisbenji
Senior Member
Thread Starter
 
thisisbenji's Avatar
 
Join Date: May 2010
Location: Wadsworth, IL
Bikes: Motobecane Vent Noir, Specialized Crux, Specialized Carve
Posts: 423
Quote:
Originally Posted by bitingduck View Post
Depends on the track and the type of racing you do. If you're riding MTV, Northbrook, or Kenosha, you can probably ride pretty much anything for anything.
I just ride at Northbrook and Kenosha, I'm not concerned with pedal strike, as I don't seem to get close even with 170s.

Quote:
Originally Posted by carleton View Post
Don't sweat the saddle height.

The 5mm shorter cranks will give less leg extension (making your saddle feel lower). But people often ride with slightly less leg extension on the track, so it might net out to the same as far as seat post extension.
Hmmm, haven't adjusted the saddle yet so maybe I'll just leave it and then change it if I feel that I need to.
thisisbenji is offline   Reply With Quote
Old 08-07-11, 05:39 PM   #12
Minion1
Senior Member
 
Join Date: Apr 2011
Bikes:
Posts: 522
http://weightweenies.starbike.com/fo...k+crank+length

Bit of a dredge but 11.4's post (scroll downa bit) deals with the biomechanics of what's going on.
Minion1 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:51 PM.