Another BB question...
#1
Member
Thread Starter
Join Date: Apr 2007
Location: SF bay area
Posts: 44
Bikes: Vitus 979 Cilo, Cannondale CAAD9, Specialized Rockhopper, Trek 760
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Another BB question...
Hello... newbie here... I'm upgrading my vintage Vitus Cilo (1989) with a new-old-stock bottom bracket. Currently, it has a Specialized bb w/ Italian threading 36 x 24F, 70mm hub width, 110mm (I think) spindle length. I want to replace it with a Shimano UN10, 36 x 24T, 70mm hub, 115mm spindle to ease up on the chain angle when using high gear (39 chainring - 13t sprocket 7-speed and 130mm hub spacing from previous 126mm)... Firstly, is the threading 24F and 24T the same? Secondly, is 115mm spindle length too much. Thank you in advance...
#2
*
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
The threading should be the same. Chainline - guessing here that you will kick your chainline out 3-4mm, just don't know the symmetry of the Specialized vs. Shimano to give you a precise answer.