Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Wed Nov 22, 2017 6:50 am

All times are UTC+01:00





Post new topic  Reply to topic  [ 33 posts ]  Go to page Previous 1 2 3 Next
Author Message
PostPosted: Sun Jan 08, 2017 1:48 am 
Offline

Joined: Thu Jul 19, 2012 6:09 pm
Posts: 1109
Location: Loveland, CO
Funny thing is, I won't notice a 2.5mm change in saddle height but I do notice a 2.5mm change in crank length. I think this is because a 2.5mm change is really a 5.0mm change since the crank rotates around the axle. The crank is longer at both the 12 o'clock and 6 o'clock positions.

Go for the 170mm. You will like it.


Top
   
PostPosted: Sun Jan 08, 2017 2:20 am 
Offline

Joined: Sun Feb 07, 2016 3:05 am
Posts: 104
Shrike wrote:
Also have a 31inch inseam. Industry standard seems to be 172.5mm, but would like to try 170mm.

http://bikedynamics.co.uk/FitGuidecranks.htm

Seems most recommendations are a bit shorter than industry standard.

Also apologies for question spam recently :P

any rider of any height can rider which ever crank length but you will have to adjust saddle height.


Top
   
Posted: Sun Jan 08, 2017 2:20 am 


Top
   
 
PostPosted: Sun Jan 08, 2017 3:12 am 
Offline

Joined: Mon Dec 19, 2016 2:36 am
Posts: 153
I'm 5'11.5" and use 170mm.


Top
   
PostPosted: Sun Jan 08, 2017 9:52 am 
Offline

Joined: Tue May 17, 2016 2:36 am
Posts: 21
I have the same inseam and I use 170 when I upgraded my crank to Ultegra 6800. I definitely did notice a difference for the better. My cadence increased slightly but it's hard to empirically prove that. I can climb out of the saddle a lot longer with the shorter cranks and if I were to do it again I'd go for 165mm but I'm stuck for the time being since I got a stages crank arm power meter.


Top
   
PostPosted: Sun Jan 08, 2017 4:28 pm 
Offline

Joined: Wed Jan 12, 2005 6:04 am
Posts: 599
Location: USA
I need more money.


Top
   
PostPosted: Sun Jan 08, 2017 5:15 pm 
Offline

Joined: Fri May 25, 2007 6:43 pm
Posts: 3285
stormur wrote:
Is thickness of all road shoes equal ? Or can vary even 3-4mm ? insole thickness ? Sock ? Pedal stack ?
none of which make the slightest difference to the circle to which your foot has to pass through. Crank length does.
Allen254 wrote:
any rider of any height can rider which ever crank length but you will have to adjust saddle height.
they'll also need to have their knees operated on eventually.


Top
   
PostPosted: Sun Jan 08, 2017 8:13 pm 
Offline

Joined: Wed Feb 03, 2010 1:31 am
Posts: 663
I am 5'11" tall. I use 175 cranks on my seven geared road bikes. 172.5 and 170 on my two single speed bikes. Mainly because those are the cranks I had in the spare parts box when I built the single speeds. Never notice any difference when riding geared and single speed bikes on back to back days. I can spin 90 rpm comfortably all day long on any crank length.


Top
   
PostPosted: Mon Jan 09, 2017 1:13 pm 
Offline

Joined: Fri Aug 27, 2010 4:22 pm
Posts: 192
I'm 5'11" (33 inseam and UK size 12 feet!) and moved to 170 cranks after riding 165's on track.

I can feel the difference but I doubt that there is a measurable performance difference. I'd imagine the only difference in reality is the reduced likelihood of pedal strike when riding through a tight corner.


Top
   
PostPosted: Mon Jan 09, 2017 3:43 pm 
Offline

Joined: Fri Oct 28, 2016 8:54 am
Posts: 35
I think inseam is more impoart factor than height only.
inseam(mm) x 0.216?


Top
   
PostPosted: Mon Jan 09, 2017 5:28 pm 
Offline

Joined: Fri Mar 18, 2005 4:12 pm
Posts: 2908
Location: eh?
RedCoke wrote:
I think inseam is more impoart factor than height only.
inseam(mm) x 0.216?


That number doesn't seem correct. A factor of 0.216 would have me on a 190 mm crank. I am 6 feet (183 cm) with average proportions. I am happy with anything up to 175 mm. I prefer 170 mm due to past knee injuries, and spinal injuries.

_________________
wheelsONfire wrote:
When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.


Top
   
PostPosted: Mon Jan 09, 2017 6:28 pm 
Offline

Joined: Wed Jun 01, 2011 7:53 am
Posts: 699
Checkout slowtwitch forum for more comprehensive discussion on this. Short crank arm is fine. Watch out for nutty ideas like Lennard Zinn's long cranks.


Top
   
PostPosted: Mon Jan 09, 2017 6:43 pm 
Offline

Joined: Thu Mar 03, 2016 8:37 pm
Posts: 81
LloydP wrote:
I'm very close to your proportions and use 170mm cranks. It works fine for me. Try it and see!


same here.


Top
   
PostPosted: Tue Jan 10, 2017 12:29 am 
Offline

Joined: Sun Feb 07, 2016 3:05 am
Posts: 104
mattr wrote:
stormur wrote:
Is thickness of all road shoes equal ? Or can vary even 3-4mm ? insole thickness ? Sock ? Pedal stack ?
none of which make the slightest difference to the circle to which your foot has to pass through. Crank length does.
Allen254 wrote:
any rider of any height can rider which ever crank length but you will have to adjust saddle height.
they'll also need to have their knees operated on eventually.


:roll:


Top
   
PostPosted: Tue Jan 10, 2017 12:55 am 
Offline

Joined: Fri Oct 28, 2016 8:54 am
Posts: 35
Mr.Gib wrote:
RedCoke wrote:
I think inseam is more impoart factor than height only.
inseam(mm) x 0.216?


That number doesn't seem correct. A factor of 0.216 would have me on a 190 mm crank. I am 6 feet (183 cm) with average proportions. I am happy with anything up to 175 mm. I prefer 170 mm due to past knee injuries, and spinal injuries.


It is "inseam(mm)" not height. Please check this.
http://www.stevehoggbikefitting.com/bik ... which-one/


Top
   
Posted: Tue Jan 10, 2017 12:55 am 


Top
   
 
PostPosted: Tue Jan 10, 2017 12:57 am 
Offline

Joined: Fri Oct 28, 2016 8:54 am
Posts: 35
Also, this site would be helpful.
http://www.peterwhitecycles.com/


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 33 posts ]  Go to page Previous 1 2 3 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Bora rider on Stages PM?

in Road

ParisCarbon

3

578

Mon Jun 05, 2017 12:00 am

ParisCarbon View the latest post

There are no new unread posts for this topic. Under 100gm saddle with some flex for 61kg rider

in Road

jemima

9

706

Tue Jul 11, 2017 9:28 pm

1415chris View the latest post

There are no new unread posts for this topic. Shortening reach on an Aeroad for a female rider - ideas/options? [solved]

in Road

Shrike

6

372

Fri Nov 03, 2017 2:27 pm

Shrike View the latest post

There are no new unread posts for this topic. Short Cranks

in Road

morganb

3

863

Sun Apr 09, 2017 3:16 am

Valbrona View the latest post

There are no new unread posts for this topic. Attachment(s) 165mm cranks

[ Go to page: 1 2 ]

in Road

peted76

24

2415

Wed Feb 15, 2017 2:20 pm

WhyZ View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], Google [Bot], Google Adsense [Bot], Klaster1 and 42 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited