Go Back  Bike Forums > Bike Forums > Fitting Your Bike
Reload this Page >

Shorten the crank or add shims?

Fitting Your Bike Are you confused about how you should fit a bike to your particular body dimensions? Have you been reading, found the terms Merxx or French Fit, and don’t know what you need? Every style of riding is different- in how you fit the bike to you, and the sizing of the bike itself. It’s more than just measuring your height, reach and inseam. With the help of Bike Fitting, you’ll be able to find the right fit for your frame size, style of riding, and your particular dimensions. Here ya’ go…..the location for everything fit related.

Shorten the crank or add shims?

Old 05-21-21, 05:21 AM
Senior Member
Thread Starter
gif4445's Avatar
Join Date: Oct 2012
Location: Kearney NE
Posts: 550

Bikes: Specialized Roubaix, Specialized Diverge, Volagi Liscio, LHT, Trek 1.2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 118 Post(s)
Liked 33 Times in 23 Posts
Shorten the crank or add shims?

My right leg is around a cm shorter than my left. Not a big deal, unless you have some resulting problems. I've been suffering from what they diagnose as Piriformis Syndrome. Initially low grade, but the last bout has lasted 5 months. My fitter has told me that the leg length difference could have caused it and is advising I get a shorter crank on the short legged side. Other sources are telling me that using shims is the logical answer, as it is cheap and may not create some other problems like an uneven crank set might. Anyone have some experience with any of this?
gif4445 is offline  
Old 05-21-21, 08:20 AM
Iride01's Avatar
Join Date: Jul 2017
Location: Mississippi
Posts: 10,962

Bikes: Tarmac Disc Comp Di2 - 2020

Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Quoted: 4421 Post(s)
Liked 2,963 Times in 2,063 Posts
There are several good discussions of this in some threads several years ago. You might try to search for those. I added my 2˘ early in and I was woefully wrong. Can't remember who it was that added seemingly the most first hand experience about this or whether they are a regular here still.
Iride01 is offline  
Old 05-21-21, 02:31 PM
Full Member
Join Date: Apr 2012
Location: Prince Edward Island, Canada
Posts: 236

Bikes: '19 Norco Bigfoot 6.1 (primary ride),'12 Motobecane Turino (killed by dog crash), '12 Trek 3700 Disc

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 119 Post(s)
Liked 96 Times in 58 Posts

I lost 2cm off my right leg in '86 in a motorcycle accident.

Haven't had any issues due to the length discrepency... I have wondered if I should experiment with different length cranks but in uncountable thousands of km of riding I've never needed them.

I hope you get your issue sorted out - that can't be fun.
Bearhawker 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 © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.