Retrobike Forum Index

It is currently Sun Dec 04, 2016 9:34 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Help - in the BB jungle
PostPosted: Sun Jun 16, 2013 11:29 pm 
Dirt Disciple
User avatar

Joined: Mon Jun 10, 2013 2:30 pm
Posts: 15
Location: Bike City Sweden
Since I've been out of the game since 97' or so, Im totally confused.

Started to look for new cranks and bottom bracket, but ended up totally perplexed :oops:
Hollowtech/Hollowtech-2 ? Octalink? BSA-thread? MegaExo BB7000 bottom bracket for 68/73 mm case? Eh, what the.....??? :shock:

I only remember using a square Shimano. :roll:

Can anyone tell me what this all is, or rather what can be used on a 97' bike, and what to look for?
It's supposed to fit a 97/98 GT STS DH, that for some unknown reason got STX-RC cranks for now.

Thanx! :facepalm:


Top
 Profile  
 
PostPosted: Sun Jun 16, 2013 11:44 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5646
Location: Aberdeen
http://en.wikipedia.org/wiki/Bottom_bracket

The internet has moved on a lot since '97 too, now if you search you can find the answers to almost any question :wink:


Top
 Profile  
 
PostPosted: Mon Jun 17, 2013 12:17 am 
Dirt Disciple
User avatar

Joined: Mon Jun 10, 2013 2:30 pm
Posts: 15
Location: Bike City Sweden
jimo746 wrote:
http://en.wikipedia.org/wiki/Bottom_bracket

The internet has moved on a lot since '97 too, now if you search you can find the answers to almost any question :wink:


Well, yes I know since I've spent most of my time on the internet since 97 - workning, instead of biking :wink:
I did search but didn't find anything reliable, and wasn't really counting on wikipedia for reliable stuff in this matter :facepalm:
But hey, thanx! looks like a lot of good stuff to read :!: :D


Top
 Profile  
 
PostPosted: Mon Jun 17, 2013 5:58 am 
Section Moderator & South West AEC
Section Moderator & South West AEC
User avatar

Joined: Mon Jun 25, 2007 3:33 pm
Posts: 8157
Location: new forest
bottom brackets can be a minefield these days.

if you have an STX-RC chainset then you'll still need square taper, the 68 or 73 refers to the bottom bracket shell width on the frame, so that's the first thing you'll need to check, then for an STX-RC chainset i think it will be 110mm if it's a 68mm shell or 113 if it's a 73mm shell.

but if you want to modernise (which is heresy here!) i would suggest you stick with shimano hollowtech 2, it's a different (better?) design where the bottom bracket axle is attached to the drive side crank, the bearings screw into the frame but sit outside the bottom bracket shell, slide the chainset axle through, slide the non drive crank on then tighten it in the same manner as tightening an aheadset by preloading the bearing and then nipping up the crank arm bolts.

other than shimano, i would only recommend raceface as being comparable as it's almost the same design.

avoid shimnao octalink and isis designs as all these run large axles but with tiny bearings which don't last very well, gxp is sram/truvativ's version of hollowtech 2, ok but still not as reliable as shimano or raceface.

so basically, stick with square taper or jump to hollowtech 2.

hope that helps.


Top
 Profile  
 
PostPosted: Mon Jun 17, 2013 12:34 pm 
Dirt Disciple
User avatar

Joined: Mon Jun 10, 2013 2:30 pm
Posts: 15
Location: Bike City Sweden
Thanks jonnyboy666, that's pretty much what I needed to hear :D

I to believe it's heresy in a way, to update. But if been caught with STX-RC cranks on a XT/XTR worthy bike like the STS DH back in 97, would probably not been ok either :wink:
Due to the somewhat fragile frame it will not see any hard downhill riding for sure, so
an expensive crank update won't happen. Just after the looks.

Still wondering why it's got STX-RC cranks, are they light or maybe DH sturdy?
I guess the original AC-cranks broke like most of them.


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: Bawgixer, foz, Gruff, kaya, Retro_Roy and 60 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