Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Air leak from "tubeless-ready" rim

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Air leak from "tubeless-ready" rim

Old 07-14-19, 01:08 AM
  #1  
snowman975
Newbie
Thread Starter
 
Join Date: Jul 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Air leak from "tubeless-ready" rim

I just set up a pair of "tubeless-ready" rims (the Arc 30 from Raceface) with TR tires from Maxxis, rim tape, and Slime sealant. After seating the bead, all the air leaks out of two holes that are machined into the rim. What are these holes for and what can I do to stop the leak? This url has a video of whats going on: youtube.com/watch?v=E4CcQ_SeEZw

Last edited by snowman975; 07-14-19 at 01:13 AM. Reason: specify parts
snowman975 is offline  
Old 07-14-19, 04:44 AM
  #2  
dsaul
Senior Member
 
Join Date: Jan 2013
Posts: 1,170
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 288 Post(s)
Liked 67 Times in 51 Posts
Check that your valve stem is tight. They need to be really tight to seal. If air is leaking into the rim cavity, it is almost always from the valve stem seal, unless you did a really bad job of taping.
dsaul is offline  
Old 07-14-19, 05:01 AM
  #3  
Racing Dan
Senior Member
 
Racing Dan's Avatar
 
Join Date: Aug 2015
Posts: 1,329
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 765 Post(s)
Likes: 0
Liked 15 Times in 13 Posts
Im guessing you are referring to the small holes that are there to evacuate water from the rim. If air is escaping that way, Im betting your tape is not airtight.
Racing Dan is offline  
Likes For Racing Dan:
Old 07-14-19, 05:59 AM
  #4  
shelbyfv
Senior Member
 
shelbyfv's Avatar
 
Join Date: Jun 2007
Posts: 5,586
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 1227 Post(s)
Liked 224 Times in 152 Posts
Maybe stupid question but are you using tubeless tape of the proper width?
shelbyfv is offline  
Old 07-14-19, 08:31 AM
  #5  
snowman975
Newbie
Thread Starter
 
Join Date: Jul 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Ok so the consensus seems to be that its a bad tape job. Ill get some tubeless specific tape and try again (and tighten the valves more). Thanks for the replies
snowman975 is offline  
Old 07-15-19, 03:33 AM
  #6  
Orlok50
Junior Member
 
Orlok50's Avatar
 
Join Date: Apr 2017
Location: Almere (The Netherlands)
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by snowman975 View Post
I just set up a pair of "tubeless-ready" rims (the Arc 30 from Raceface) with TR tires from Maxxis, rim tape, and Slime sealant. After seating the bead, all the air leaks out of two holes that are machined into the rim. What are these holes for and what can I do to stop the leak? This url has a video of whats going on: youtube.com/watch?v=E4CcQ_SeEZw
These holes are to evacuate water in the rim, so just block it with (some) tubeless tape at the inside.
Orlok50 is offline  
Old 07-15-19, 12:49 PM
  #7  
ThermionicScott 
hungry
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Posts: 19,051

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)

Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 2302 Post(s)
Liked 263 Times in 198 Posts
Originally Posted by snowman975 View Post
Ok so the consensus seems to be that its a bad tape job. Ill get some tubeless specific tape and try again (and tighten the valves more). Thanks for the replies
What tape are you using now, if it isn't tubeless-specific?
__________________
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
RUSA #7498
ThermionicScott is offline  
Old 07-15-19, 09:35 PM
  #8  
snowman975
Newbie
Thread Starter
 
Join Date: Jul 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The old tape had been applied at a bike shop over a year ago. Yesterday I took that stuff off and applied Stan's tape, that did the trick. There was a slow leak that lasted for the first couple fills, but now it seems to have sealed and is holding pressure at 30 psi.
snowman975 is offline  
Old 07-22-19, 01:54 AM
  #9  
Orlok50
Junior Member
 
Orlok50's Avatar
 
Join Date: Apr 2017
Location: Almere (The Netherlands)
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by snowman975 View Post
The old tape had been applied at a bike shop over a year ago. Yesterday I took that stuff off and applied Stan's tape, that did the trick. There was a slow leak that lasted for the first couple fills, but now it seems to have sealed and is holding pressure at 30 psi.
30psi isn't enough for road tires, must be at least 80psi.
Orlok50 is offline  
Old 07-22-19, 04:51 AM
  #10  
dsaul
Senior Member
 
Join Date: Jan 2013
Posts: 1,170
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 288 Post(s)
Liked 67 Times in 51 Posts
Originally Posted by Orlok50 View Post
30psi isn't enough for road tires, must be at least 80psi.
The ARC 30 is an MTB rim, so they probably are not road tires.
dsaul is offline  
Old 07-22-19, 08:15 AM
  #11  
Orlok50
Junior Member
 
Orlok50's Avatar
 
Join Date: Apr 2017
Location: Almere (The Netherlands)
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Orlok50 View Post
30psi isn't enough for road tires, must be at least 80psi.
The Excel sheet that you showing us is simply based on the experience of users and don't have any connection with the recommandations of the manufacturer like f.e. Hutchinson or Schwalbe which you can read they recommand at least 80psi for road tires in 25 and 28 mm of the largeur.!
Orlok50 is offline  
Old 07-22-19, 10:25 AM
  #12  
Orlok50
Junior Member
 
Orlok50's Avatar
 
Join Date: Apr 2017
Location: Almere (The Netherlands)
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The link in your post to Enve isn't to a manufacturer of tires, they have only knowledge of rims and wheels.

The real manufactures of tires you didn't link in your post, so I did it for all and you'll see the lowest pressure is 5 bar for 25 mm. Okay, you'll right it had to be 75psi.

A manufacturer that recommends that folks do not exceed 80 psi when running 25mm road tires don't know what's he's talking.
Orlok50 is offline  
Old 07-22-19, 11:59 AM
  #13  
dsaul
Senior Member
 
Join Date: Jan 2013
Posts: 1,170
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 288 Post(s)
Liked 67 Times in 51 Posts
My Schwalbe Pro One 28mm tubeless tires are clearly labeled 60-95psi
dsaul is offline  
Old 07-22-19, 12:35 PM
  #14  
ksryder
Senior Member
 
Join Date: May 2014
Posts: 2,180

Bikes: yes

Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 954 Post(s)
Liked 243 Times in 144 Posts
Road tires don't need 80 psi -- source: literally thousands of people who ride less than that.

30 psi is probably too loo for most road tires but OP has MTB rims and Maxxis tires which leads to a high probability that OP is talking about MTB tires (Maxxis makes road tires but no one uses them.) 30 psi is plenty for lots of MTB and CX applications.

Finally -- are we all going to ignore the use of Slime? Get thee some Stans or Orange Seal, post haste!
ksryder is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GeogreHudetz
Bicycle Mechanics
3
08-17-19 05:52 PM
vtje
Bicycle Mechanics
13
12-21-17 04:13 AM
yannisg
Bicycle Mechanics
17
04-22-16 12:46 PM
Aero-X
Bicycle Mechanics
3
10-09-15 06:54 PM
cth6
Road Cycling
1
09-11-14 09:01 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.