Retrobike Forum Index

It is currently Thu Dec 08, 2016 10:56 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 5 posts ] 
Author Message
PostPosted: Sat Oct 19, 2013 12:54 pm 
Old School Hero
User avatar

Joined: Tue Oct 02, 2012 12:39 pm
Posts: 233
Location: Isle of Man
Hello

I'm gathering the bits needed to tart up my 1994 lava dome frame (just out of interest is it the same frame as the cinder cone ? - the geometry and spec look the same)

I'm gathering bits and pieces and I'm currently looking for a new BB, I fancy something like a hope or a Royce but I'm not sure about the dimensions.

Why don't you go and measure your current BB ? you're probably thinking.

Because the bike is in the IOM and I'm in Spain until Christmas so I can't measure it. At the minute I'm trawling the wonder web looking for and buying bits.

Can anyone tell me what the correct size is for the bike. I'm pretty sure the BB shell is 68mm wide but not sure on the correct axle length. I'm going to keep the bike true to the era and will fit square taper cranks, most likely XT.

Any help greatly appreciated.

James


Top
 Profile  
 
PostPosted: Sat Oct 19, 2013 4:42 pm 
Retro Guru

Joined: Thu Apr 17, 2008 3:05 pm
Posts: 320
Location: The West Riding of Yorks
If your sure of the shell size and your certain which chain set you going to use , you can look up the correct shaft length using Sheldon Browns database. sheldonbrown.com/bbsize.html‎
Hope this is some use to you.


Top
 Profile  
 
PostPosted: Sat Oct 19, 2013 4:46 pm 
Gold Trader
Gold Trader
User avatar

Joined: Thu Mar 29, 2007 1:08 am
Posts: 2658
Location: Kray Territory
All of the Konas I've owned (6 and counting) have had a 68mm BB shell, so no worries there..

The axle length is really dependent on the cranks that you plan to fit though, older XT or Deore cranks (stamped M730 or MT60) require a 122.5 axle length, but finding a posh bottom bracket in this length is starting to become a tricky exercise. These cranks are also a little old for a '94 frame if you want to do the whole period correct thing.

Newer square taper cranksets tend to need an axle between 110-118mm depending on the brand and you will probably find BB's easier to source. It's probably worth deciding on the cranks that you would like and then checking for axle lengths on the web, there's loads of forums and sites that should be able to tell you what you need - and on here of course :wink:


Top
 Profile  
 
PostPosted: Sat Oct 19, 2013 5:02 pm 
Old School Hero
User avatar

Joined: Tue Oct 02, 2012 12:39 pm
Posts: 233
Location: Isle of Man
Thanks fellas, that's a big help to me.

It's an English thread I take it ?

I've got my eye on a royce titanium (68 x 113mm) Sure there'll be something to fit that.


Top
 Profile  
 
PostPosted: Sun Oct 20, 2013 8:41 am 
Old School Grand Master
User avatar

Joined: Tue Feb 17, 2009 1:16 pm
Posts: 4339
The LD and CC use the same tube set. The bb is defo 68mm and English style. Length as indicated is the tricky bit as it's based on your cranks and the resulting chain allignment. Generally 118+ is getting on the long side.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: kingoffootball and 48 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