Vent Hole Question on Mtn Cruiser Frame-
Results 1 to 3 of 3
  1. #1
    mtbr member
    Join Date
    Aug 2018

    Vent Hole Question on Mtn Cruiser Frame

    Question for those that have built a klunker/cruiser type frame (similar to this:

    My question is about venting the middle tube that runs from the ST to the DT. There will be a vent hole on the ST end (vent hole in the ST), but I’m not sure what to do at the DT end. Did you also put a vent hole in the DT?

    I was leaning toward just a small “weep” hole on the underside of the middle tube and not putting a larger vent hole in the DT, but curious what others have done.


  2. #2
    mtbr member
    Reputation: Eric Malcolm's Avatar
    Join Date
    Dec 2011
    Personally, I would only have a vent hole into the ST and leave the DT. I am a brazer so you need a hole to allow expanding gases to escape and you only need 1 hole for this to happen.

    If I don't make an attempt, how will I know if it will work?

  3. #3
    mtbr member
    Join Date
    Aug 2018
    Thanks Eric. It seemed to me that drilling a hole in the DT wasn’t necessary. I’m just in the habit of vent holes at all front triangle joints. I’ll probably still put a weep hole on the underside of the middle tube, near the DT. It’ll be fillet brazed so I want to allow some water flow to clean out flux.

Similar Threads

  1. Rotor vent hole noise?
    By keen in forum Brake Time
    Replies: 6
    Last Post: 12-05-2014, 09:18 AM
  2. Vent Hole size for Fillet Brazing?
    By illcomm33 in forum Frame Building
    Replies: 2
    Last Post: 01-07-2012, 05:11 PM
  3. Just wanted to vent a bit after this...
    By steven_first in forum Downhill - Freeride
    Replies: 4
    Last Post: 03-29-2011, 03:31 PM
  4. minor vent
    By annamagpie in forum Women's Lounge
    Replies: 12
    Last Post: 03-29-2011, 09:30 AM

Members who have read this thread: 29

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts




© Copyright 2020 VerticalScope Inc. All rights reserved.