Bottom bracket and their square pegs.
06-05-07, 09:40 PM
#1
Junior Member
Thread Starter
Join Date: May 2007
Location: Modesto
Posts: 18
Bikes: 1986 Specialized Stump Jumper.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Bottom bracket and their square pegs.
Hello to all,
I will say again, excuse my ignorance as I am new to road bikes and their parts. Now, bottom brackets, they all seem to have the same square shaped thinga-ma-jiggy sticking out that the crank fits on to. Are they all the same size? Will any crank assembly fit on all bottom brackets? I have my eye on a sweet Vintage Raleigh frame and was wondering if I should buy a Campagnolo triple set up that I saw on ebay before I ever see the frame. What is the normal process for buying used parts to put on old bike frames? Thanks
I will say again, excuse my ignorance as I am new to road bikes and their parts. Now, bottom brackets, they all seem to have the same square shaped thinga-ma-jiggy sticking out that the crank fits on to. Are they all the same size? Will any crank assembly fit on all bottom brackets? I have my eye on a sweet Vintage Raleigh frame and was wondering if I should buy a Campagnolo triple set up that I saw on ebay before I ever see the frame. What is the normal process for buying used parts to put on old bike frames? Thanks
06-05-07, 11:10 PM
#2
ಠ_ಠ
Join Date: Sep 2006
Location: SF
Posts: 624
Bikes: One of the first Aluminum Rockhoppers to come with front suspension.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
06-05-07, 11:48 PM
#3
Senior Member
Join Date: Aug 2006
Location: Raleigh NC
Posts: 1,020
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by DevilsGT2
If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
there are 2 sizes. ISO, and JIS
https://www.sheldonbrown.com/bbtaper.html
06-06-07, 03:12 AM
#4
I ain't no newbie
Join Date: May 2007
Location: The Goddard Institute - Area 51-Skunk Works Division - Space Age Materials Lab
Posts: 1,189
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 275 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Originally Posted by DevilsGT2
If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
06-06-07, 05:57 AM
#5
*
Join Date: Jan 2007
Posts: 3,458
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
My money's on the old Raleigh's BB spindle length not matching what you'll need for the Campy triple, but your swap should be easy. How old and what model frame? Raleigh did have some with proprietary threading, you'll want to avoid those.
