Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Seat Post Fit

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Seat Post Fit

Old 04-16-14, 05:26 AM
  #1  
daf1009
Senior Member
Thread Starter
 
daf1009's Avatar
 
Join Date: Mar 2010
Location: Alpharetta, GA
Posts: 3,178

Bikes: LESS than I did a year ago!

Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 70 Post(s)
Likes: 0
Liked 3 Times in 2 Posts
Seat Post Fit

Hi All...

Needing advice here...I just got a 1962 Raleigh Gran Sport...and I am having some severe difficulty in getting the seat post back into the frame. I have measured the opening for the seat tube and the seat post itself...from the measurements, it should be a relatively good fit. Interestingly, the seat post is circularly (like a circular stair case) marked almost all the way up the post. This seems to indicate that, when disassembled, the post had to be "twisted" out...almost like screwing it out.

I have tried to measure the seat tube opening for being egg shaped, but it does not appear to be very bad that way.

Any advice/suggestions?
daf1009 is offline  
Old 04-16-14, 05:49 AM
  #2  
hueyhoolihan
Senior Member
 
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Posts: 6,681

Bikes: 8 ss bikes, 1 5-speed touring bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 86 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
if it were my bike, and i am assuming the seatpost in question came out of that frame, i would just sand the post a bit until it went back in smoothly. another option would be to get the next size smaller post...
hueyhoolihan is offline  
Old 04-16-14, 05:54 AM
  #3  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 25,863

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 138 Post(s)
Tagged: 1 Thread(s)
Quoted: 5254 Post(s)
Liked 2,824 Times in 1,666 Posts
Originally Posted by daf1009 View Post
Hi All...

Needing advice here...I just got a 1962 Raleigh Gran Sport...and I am having some severe difficulty in getting the seat post back into the frame. I have measured the opening for the seat tube and the seat post itself...from the measurements, it should be a relatively good fit. Interestingly, the seat post is circularly (like a circular stair case) marked almost all the way up the post. This seems to indicate that, when disassembled, the post had to be "twisted" out...almost like screwing it out.

I have tried to measure the seat tube opening for being egg shaped, but it does not appear to be very bad that way.

Any advice/suggestions?
Check for a burr in the seat tube.
__________________
Stuart Black
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
cyccommute is offline  
Old 04-16-14, 06:27 AM
  #4  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 36,740

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 131 Post(s)
Tagged: 1 Thread(s)
Quoted: 4767 Post(s)
Likes: 0
Liked 759 Times in 473 Posts
Originally Posted by cyccommute View Post
Check for a burr in the seat tube.
+1

specifically, feel along the inside of the slot in the back of the seat tube. This is cut with a circular saw which tends to leave burrs on the inside. You can file them out with a rat tail or triangular file, but work upside down so any filings don't fall into the frame where they can get into the crank bearings.

Also the corners at the top of the slot sometimes get pushed in if the frame was dropped onto that end in production, so a bit of filing there often solves the problem.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is online now  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Just Riding
Bicycle Mechanics
14
11-16-22 11:50 AM
crandress
Classic & Vintage
4
01-06-18 05:56 PM
cpsqlrwn
Classic & Vintage
14
04-26-16 11:12 AM
Chris Chicago
Bicycle Mechanics
5
05-23-15 12:40 PM
paktinat
Bicycle Mechanics
4
03-11-11 05:04 PM

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 or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.