Go Back  Bike Forums > Bike Forums > Tandem Cycling
Reload this Page >

Change Seatpost or Crank Shorteners for Child Stoker

Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

Change Seatpost or Crank Shorteners for Child Stoker

Old 10-06-19, 07:07 AM
Junior Member
Thread Starter
Join Date: Sep 2016
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Change Seatpost or Crank Shorteners for Child Stoker

I just picked up a used tandem and my son is about 1Ē too short with seat all the way down. I think there are two options:
1. Switch out the suspension seatpost with a regular seatpost to lower the seat further.
2. Put on crank shorteners

A third option would be a thinner saddle, though I donít think Iíll get the inch I want from it.

Any advise or experience would be appreciated.
rzsionak is offline  
Old 10-06-19, 08:43 AM
Joint Venture
Join Date: Sep 2017
Posts: 27
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Maybe both #1 and #2 together. If the cranks are too long, thatís a separate problem from whether the saddle is too high or not. FYI, da Vinci makes short cranks as well as some 3-hole cranks too (good for when both a child and an adult will be a stoker on the same tandem - just move the pedals!).
Joint Venture is offline  
Old 10-07-19, 08:33 AM
Long-term wear tester
Join Date: Dec 2006
Location: Seacoast, NH
Posts: 688

Bikes: Cycles Chinook travel/gravel/family tandem, KHS CX200 road/gravel, Voodoo Agwe fixie commuter, Gunnar Sport travel/road, Motobecane Boris fatbike

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Likes: 0
Liked 8 Times in 7 Posts
I agree with Joint Venture's recommendation to do both. Lower profile seatpost AND shorter cranks. The cranks should be about the same length as your son's single bike. My 5yo daughter's 14" bike has 102mm cranks, so that's the shortest crank length on our kiddie stoker setup.
Also note that little kids are light. You should lower the rear tire pressure to give them some suspension.

Kid stoker setup with telescoping seat post and multi-hole crankarms.
OneIsAllYouNeed is offline  
Old 10-07-19, 12:58 PM
Senior Member
Join Date: Nov 2011
Posts: 141
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
If you get a straight post with a separate clamp like on inexpensive bikes, you can flip the clamp over so the clamp bolt and nuts are above the saddle rails. This will get the rails to around the top of the frame clamp. I agree with others that you probably need to do crank shorteners as well.
WheelsNT is offline  
Likes For WheelsNT:

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

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