Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

User Tag List

Thread Tools Search this Thread
Old 02-01-06, 05:39 PM   #1
Thread Starter
Join Date: Feb 2006
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
framebuilding question about u-brake pivot locations

hi --

i'm working on my first framebuilding project -- a bmx freestyle frame -- & was wondering if any of you could point me toward information regarding the "official" locations for u brake mounts (dia compe 990 style).

specifically, i'm looking for:

1. the side-to-side distance between the centers of the studs next to each other.

2. for 20" bmx wheels, the distance bewtween the axle centerline & the centerline of the pair of studs.

i've measured a bunch of frames & forks & can come up with an average, but i'd like to use the "official" figure, if possible. i'd imagine either diacompe or shimano have published this info somewhere.


Chunkstyle2 is offline   Reply With Quote
Old 02-01-06, 09:06 PM   #2
Older I get, Better I was
velonomad's Avatar
Join Date: Nov 2003
Location: Greenfield Lake, Wilmington NC
Bikes: '14 BD Lurch Fatbike, '10 homemade road,'03 homemade tourer, '94 Yokota Tandem, '88 homemade MTB
Posts: 1,760
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Shimano had it published at one time, stud to stud on center IIRC is 80 mm for ~20-30mm width rims . I don't know what the reach range is on a 990, so I would install a wheel ,clamp the brakes against the rim and mark the stud centers on the stays. be sure to have the pads centered or a bit high in thier adjustment range when you make your mark.
velonomad is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 10:24 PM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.