Go Back  Bike Forums > Bike Forums > Singlespeed & Fixed Gear
Reload this Page >

Is 170mm Fine for Crit Racing? (My Frame has a Toe Lap))

Notices
Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

Is 170mm Fine for Crit Racing? (My Frame has a Toe Lap))

Old 03-16-20, 03:33 AM
  #1  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Is 170mm Fine for Crit Racing? (My Frame has a Toe Lap))

is 170mm Fine for Crit Racing? Well, i was advised by a World Class Bike Fitter (Literally, the Only one in ASIA) that my body is suited for a 170mm Crank.

But I'm currently Running a 165mm cranks. (And a 165mm has a Toe Lap also)

My Question is, Will a 170mm with Frame has a Toe Lap (Cinelli Parallax size 54) will Kill me because of the Toe lap or when cornering?

Thanks in Advance!
SuperPershing is offline  
Old 03-16-20, 05:30 AM
  #2  
Trakhak
Senior Member
 
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 1,937
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 473 Post(s)
Liked 110 Times in 76 Posts
Some recent studies have suggested that the use of shorter cranks is beneficial or, at least, not less efficient than the use of longer cranks for almost all cyclists. Note that almost track cyclists use 165-mm cranks, regardless of height or leg length.

That said, foot contact with the front tire is impossible at any speed above walking pace. Above that speed, you steer by leaning, not by turning the handlebars.
Trakhak is online now  
Old 03-16-20, 06:21 AM
  #3  
TugaDude
Senior Member
 
TugaDude's Avatar
 
Join Date: Nov 2010
Posts: 2,253
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Liked 75 Times in 67 Posts
I agree with Trakhak that the risks are less when racing. The issue is going to be when going around sharp turns, likely at a much slower pace. However, common sense also indicates that the longer the crank, the better the chance of the crank striking the ground when leaning.

Most track-specific frames have a higher bottom bracket, so this is minimized, but it still can happen. Pedal strike can be as bad or worse than toe overlap.
TugaDude is offline  
Old 03-16-20, 06:57 AM
  #4  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by TugaDude View Post
I agree with Trakhak that the risks are less when racing. The issue is going to be when going around sharp turns, likely at a much slower pace. However, common sense also indicates that the longer the crank, the better the chance of the crank striking the ground when leaning.

Most track-specific frames have a higher bottom bracket, so this is minimized, but it still can happen. Pedal strike can be as bad or worse than toe overlap.
Hows the Geometry of the Cinelli Mash Parallax? High chance of striking?
SuperPershing is offline  
Old 03-16-20, 08:02 AM
  #5  
TugaDude
Senior Member
 
TugaDude's Avatar
 
Join Date: Nov 2010
Posts: 2,253
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Liked 75 Times in 67 Posts
Originally Posted by SuperPershing View Post
Hows the Geometry of the Cinelli Mash Parallax? High chance of striking?

TugaDude is offline  
Old 03-16-20, 08:33 AM
  #6  
TugaDude
Senior Member
 
TugaDude's Avatar
 
Join Date: Nov 2010
Posts: 2,253
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Liked 75 Times in 67 Posts
I searched online for reviews of that frame set, but unfortunately none really discussed toe overlap or bottom bracket height. In my opinion, two of the most important features of this type of bike. You can deal with both issues, but it is good to know that they are a potential.
TugaDude is offline  
Old 03-16-20, 09:19 AM
  #7  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by TugaDude View Post
I searched online for reviews of that frame set, but unfortunately none really discussed toe overlap or bottom bracket height. In my opinion, two of the most important features of this type of bike. You can deal with both issues, but it is good to know that they are a potential.
Thanks for the Effort Bro <3 , In your own opinion and own understanding of that geometry of the Parallax (which is frame rn, size 54) does it have a high chance of striking the ground if i bank of a crit curve?
SuperPershing is offline  
Old 03-16-20, 09:26 AM
  #8  
TugaDude
Senior Member
 
TugaDude's Avatar
 
Join Date: Nov 2010
Posts: 2,253
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Liked 75 Times in 67 Posts
Originally Posted by SuperPershing View Post
Thanks for the Effort Bro <3 , In your own opinion and own understanding of that geometry of the Parallax (which is frame rn, size 54) does it have a high chance of striking the ground if i bank of a crit curve?
I'll have to defer to others on that question. Maybe someone who owns one can chime in here. Just looking at the dimensions, I honestly cannot determine exact BB height. You'd need that in order to compare to existing bikes you may own and ride in order to see if it is a concern.
TugaDude is offline  
Old 03-16-20, 10:46 AM
  #9  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by TugaDude View Post
I'll have to defer to others on that question. Maybe someone who owns one can chime in here. Just looking at the dimensions, I honestly cannot determine exact BB height. You'd need that in order to compare to existing bikes you may own and ride in order to see if it is a concern.
Okay no Worries! Thanks mate!
SuperPershing is offline  
Old 03-16-20, 01:49 PM
  #10  
REDMASTA
Senior Member
 
REDMASTA's Avatar
 
Join Date: Apr 2016
Location: Traveling through time, will return last week.
Posts: 649

Bikes: Bare Rum Sword Knuckle Runner

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 242 Post(s)
Liked 43 Times in 28 Posts


bank of a crit curve? if you think you need 170mm crank arms then give them a try, how should we know what will work for you.

Last edited by REDMASTA; 03-16-20 at 01:52 PM.
REDMASTA is offline  
Old 03-17-20, 09:50 AM
  #11  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by REDMASTA View Post


bank of a crit curve? if you think you need 170mm crank arms then give them a try, how should we know what will work for you.
Well, i haven't bought a 170mm Cranks yet so that is why I'm asking some folks here if they have a similar experience so i can gain a insight
SuperPershing is offline  
Old 03-17-20, 10:51 AM
  #12  
Russ Roth
Senior Member
 
Join Date: Dec 2019
Location: South Shore of Long Island
Posts: 763

Bikes: 2010 Carrera Volans, 2015 C-Dale Trail 2sl, 2017 Raleigh Rush Hour, 2017 Blue Proseccio, 1992 Giant Perigee, 80s Gitane Rallye Tandem

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked 186 Times in 143 Posts
They give you F in the piece above. Measure the diameter of your wheel to the outside of the tire, my wife's as an example measured 340mm, take that and crank length and subtract from F which is 557 for a medium in the chart above. For me that would leave 47mm. Measure from the where the spindle sits below the cleat to the front of the shoe, whatever that happens to be taken from the remainder is your overlap. This won't be perfect however unless you ride with your heel down as you pedal so that on the upstroke your foot really is in line with the crank at the closest point, this is the case for a few riders. Mostly people ride heel up or flat when so that when the crank is at the closest point you will gain a few extra mm that might made the difference.
Personally everything I have read says that a longer crank length doesn't make a significant difference, it'll matter more if you mash vs. spin and unless you're taller can even harm your pedal stroke by causing more rocking at the hips. I would be inclined to find better things to spend the money on then a marginal improvement. Though if you're above 6' I'd be more inclined to try longer.
Russ Roth is offline  
Old 03-17-20, 01:42 PM
  #13  
SuperPershing
Senior Member
Thread Starter
 
SuperPershing's Avatar
 
Join Date: Sep 2016
Posts: 129
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Russ Roth View Post
They give you F in the piece above. Measure the diameter of your wheel to the outside of the tire, my wife's as an example measured 340mm, take that and crank length and subtract from F which is 557 for a medium in the chart above. For me that would leave 47mm. Measure from the where the spindle sits below the cleat to the front of the shoe, whatever that happens to be taken from the remainder is your overlap. This won't be perfect however unless you ride with your heel down as you pedal so that on the upstroke your foot really is in line with the crank at the closest point, this is the case for a few riders. Mostly people ride heel up or flat when so that when the crank is at the closest point you will gain a few extra mm that might made the difference.
Personally everything I have read says that a longer crank length doesn't make a significant difference, it'll matter more if you mash vs. spin and unless you're taller can even harm your pedal stroke by causing more rocking at the hips. I would be inclined to find better things to spend the money on then a marginal improvement. Though if you're above 6' I'd be more inclined to try longer.
Ohhh i see i see. i'd measure it tomorrow cause its now night.

And i'm 5'7 btw
SuperPershing is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.