Saddle height when changing crank length

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guyken

Post subject: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 3:35 pm

Joined: Sun Feb 18, 2007 6:21 pm
Posts: 73

Hello,

I'm changing my cranks from 172.5 to 175,must i drop the saddle 2.5mm or less or not change it at all?

all advice :welcome:

Thanks a lot guys!

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bricky21

Post subject: Re: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 5:08 pm

Joined: Tue Sep 14, 2010 3:28 pm
Posts: 1227

Don't change your saddle height at first. Mount your new cranks and only adjust the height if needed to smooth out your pedal stroke. No number, angle or calculation can predict what saddle height/crank length will allow you to produce the smoothest pedal stroke your capable of.

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artray

Post subject: Re: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 7:01 pm

Joined: Fri Oct 07, 2011 2:08 pm
Posts: 1366

Why? Go for an extreme drop, more aero and looks cool .

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MajorMantra

Post subject: Re: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 8:37 pm

Joined: Mon Nov 02, 2009 8:38 pm
Posts: 186

I would drop it 2.5mm. Maximum leg extension is the primary factor in setting saddle height and you will increase it unless you drop the saddle.

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sanrensho

Post subject: Re: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 9:28 pm

Joined: Tue Aug 02, 2011 5:54 pm
Posts: 64

Try it first without dropping your saddle. You might find that there is no need to change.

As an experiment, I recently tried going from 165mm to 172.5mm and found that my regular saddle height worked best. (Since swapped out to 170mm cranks, again same saddle height as before.)

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theremery

Post subject: Re: Saddle height when changing crank length

Posted: Fri Sep 28, 2012 11:57 pm

Joined: Sun Jun 12, 2005 10:56 am
Posts: 3126
Location: New Zealand

A tiny drop is most likely but if your hip angle is compressed this may be more of an issue (ride with a REALLY flat back??).....just try it

(I'd raise the 2 ish mm and get on with it...shoe height stack differences make more difference than 2mm BTW)

_________________
Used to race....got too wrinkly and old

Updated: Racing again! Thought this was unlikely! Eventually, I may even have a decent race!

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