Retrobike Forum Index

It is currently Sun Dec 04, 2016 11:35 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Seat Post conundrum
PostPosted: Sun Jul 28, 2013 10:28 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Mon Jun 07, 2010 4:00 pm
Posts: 959
Location: Hunting down the "foxes" of lincolnshire
Anyone got any clue as to a bizarre seat post problem I've got with the MF Alu Pro

Anecdotally they suit a 27.2mm. Although I've only been able to find people with later '90 on wishbone framesets.

I have a 26.8 which is a smidge loose (measures 26.75ish with my vernier) and there's a discernible if slight side to side movement when un-clamped.

I have a 27.0 which is tighter than a constipated gnat. And can only be inserted with considerable force and a whole lotta lube :oops:

I've eased the top of the seat tube in case there's any tightening (even 'wedged' the 27.0 is still too tight)

As there's no 26.9mm alternative, what to do?

Any thoughts welcome....
And


Top
 Profile  
 
 Post subject: Re: Seat Post conundrum
PostPosted: Mon Jul 29, 2013 12:22 am 
BoTM Winner / Gold Trader
BoTM Winner / Gold Trader
User avatar

Joined: Fri Feb 26, 2010 12:36 am
Posts: 4715
Location: Burlington, ON Canada
if the 26.8 is loose, and the 27,0 goes in but is tight, you're only talking about .001-.002"/side. A few passes with a brake MC hone and the 27.0 should slide right in.

Image

PSA: Do it with the seat tube < horizontal to keep debris from migrating down into your BB.


Top
 Profile  
 
 Post subject: Re: Seat Post conundrum
PostPosted: Mon Jul 29, 2013 2:08 am 
Old School Grand Master

Joined: Sun Oct 21, 2007 2:33 am
Posts: 5487
Location: WI, USA
Use the 26.8 no grease, just Phil Wood Oil and you'll be fine.


Top
 Profile  
 
 Post subject: Re: Seat Post conundrum
PostPosted: Mon Jul 29, 2013 7:48 am 
Retro Guru
User avatar

Joined: Mon Mar 28, 2011 9:29 pm
Posts: 1877
Location: Somerset
Archemist wrote:

I've eased the top of the seat tube in case there's any tightening (even 'wedged' the 27.0 is still too tight)

Any thoughts welcome....
And


Clearly dependant on which is more special, but I'd be inclined to reduce the 27.0 seatpost rather than stretch out the frame. HTH

Ps) I'd expect the 26.8 post to slip down the tube if you can get a 27.0 in (and out).


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: bartsince1975, Google [Bot], I_am_Will, MSNbot Media, Rampage and 34 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:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group