Retrobike Forum Index

It is currently Thu Dec 08, 2016 1:12 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Wed Jun 05, 2013 1:13 pm 
Newbie

Joined: Wed Jun 05, 2013 10:00 am
Posts: 1
I have a pretty much original 1991 Kona Firemountain, only real issue I have (apart from needing a respray) is that I need a Bottom Bracket needs replacing. The old Tange unit has had it. It is a standard 68mm British Tapered Square with a spindle length of 125mm (measured)

I am thinking of replacing it with a Shimano BB-UN55 but that only comes in a 122.7 or 127 spindle. Which one do people think I should go for? I am assuming the 127????


Top
 Profile  
 
PostPosted: Wed Jun 05, 2013 1:40 pm 
Retro Guru
User avatar

Joined: Wed Jan 28, 2009 11:50 pm
Posts: 1392
Location: Where ever the beer (or Vodka) flows.
If the cranks are a bit worn (but still useable) on the taper or you had minimal clearance then use a 127. If there was plenty of clearance between chainrings and chainstay then 122.5.


Top
 Profile  
 
PostPosted: Wed Jun 05, 2013 5:11 pm 
Old School Grand Master
User avatar

Joined: Tue Feb 17, 2009 1:16 pm
Posts: 4339
That's a tricky one. I think you should be fine with a 122 because it's a pretty slim frame and the rear stays don't branch out too much. 127 might be too long...but as above, it depends on how worn the cranks are.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Hotwheels., james1985, kermitgreenkona88, nutallabrot, Yahoo [Bot] and 36 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