Retrobike Forum Index

It is currently Sat Dec 10, 2016 8:02 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Idiotic questions
PostPosted: Wed Jul 04, 2012 11:32 pm 
MacRetro rider
MacRetro rider
User avatar

Joined: Sat May 22, 2010 7:25 pm
Posts: 4977
Location: Edinburgh
As my move to the scary world of disc brakes picks up speed the more I realise how little I know about them. Specifically the difference between mounts. People keep using terms like IS and post.

What does it all mean? I see the mount on the rear triangle of frames and the mounts on forks and they all look the same to me. What am i not getting?

Forgive me, I'm old :lol:


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:36 pm 
Moderator /Lincs, E & S Yorks Deputy AEC
Moderator /Lincs, E & S Yorks Deputy AEC
User avatar

Joined: Mon Nov 26, 2007 6:16 pm
Posts: 4144
Location: RetroModding™ since 1988
Image

You can have either mount on the fork or the frame

You can get adaptors for most mount combo's, but some may require a larger than 160mm rotor IIRC


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:40 pm 
MacRetro rider
MacRetro rider
User avatar

Joined: Sat May 22, 2010 7:25 pm
Posts: 4977
Location: Edinburgh
Riiiiggght!

So it appears that IS is indeed more standard as I've never knowingly spotted post mount.

This could be a confusing few weeks :D


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:45 pm 
Moderator /Lincs, E & S Yorks Deputy AEC
Moderator /Lincs, E & S Yorks Deputy AEC
User avatar

Joined: Mon Nov 26, 2007 6:16 pm
Posts: 4144
Location: RetroModding™ since 1988
Tazio wrote:
Riiiiggght!

So it appears that IS is indeed more standard as I've never knowingly spotted post mount.

This could be a confusing few weeks :D
Post mount (PM) is popular again, mostly found on forks, but now on frames too.

But it has the issue of being able to strip the threads in the frame or fork, meaning helicoil time!

IS doesn't suffer with this issue, but caliper alignment can be a little trickier than PM


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:48 pm 
MacRetro rider
MacRetro rider
User avatar

Joined: Sat May 22, 2010 7:25 pm
Posts: 4977
Location: Edinburgh
Andy B wrote:
IS doesn't suffer with this issue, but caliper alignment can be a little trickier than PM


Excellent, more stuff for me to make an arse of :D

I'm quite looking forward to it now, no more wincing at the sound of rims being eaten on nasty days.


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:51 pm 
Moderator /Lincs, E & S Yorks Deputy AEC
Moderator /Lincs, E & S Yorks Deputy AEC
User avatar

Joined: Mon Nov 26, 2007 6:16 pm
Posts: 4144
Location: RetroModding™ since 1988
Tazio wrote:
Andy B wrote:
IS doesn't suffer with this issue, but caliper alignment can be a little trickier than PM


Excellent, more stuff for me to make an arse of :D

I'm quite looking forward to it now, no more wincing at the sound of rims being eaten on nasty days.
Yup, no more rims being eaten





just brake pads instead ;)

Oh have a look at http://www.parktool.com/blog/repair-help for tips


Top
 Profile  
 
 Post subject:
PostPosted: Wed Jul 04, 2012 11:56 pm 
MacRetro rider
MacRetro rider
User avatar

Joined: Sat May 22, 2010 7:25 pm
Posts: 4977
Location: Edinburgh
Cheers Andy, that Park link is superb.


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jul 05, 2012 12:12 am 
retrobike rider
retrobike rider
User avatar

Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1802
Location: A wretched hive of scum and villainy...
Does anyone know where I can find standard dimensions etc for post mount?

IS standards I can find, but PM seems elusive.

All the best,


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jul 05, 2012 12:18 am 
Gold Trader / rb Rider / Special
Gold Trader / rb Rider / Special
User avatar

Joined: Mon Aug 31, 2009 12:26 am
Posts: 16165
Location: Rurally close.
51mm?

Otherwise it will vary (as to what size rotor) by manufacturer if thats what you mean.
Its essentially what size 'stub'there is.


Top
 Profile  
 
 Post subject:
PostPosted: Thu Jul 05, 2012 9:50 am 
retrobike rider
retrobike rider
User avatar

Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1802
Location: A wretched hive of scum and villainy...
Thanks Cyfa.

I've got a project that needs a disc mount, so I've got an Anvil FengShui to fit IS:
Image
but I was fancying a neater postmount like this:

Image

Looks like there's no Standard :cry:

All the best,


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 9 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