Go Back  Bike Forums > Bike Forums > Cyclocross and Gravelbiking (Recreational)
Reload this Page >

Does dirt collect right around anyone else's valve stems?

Notices
Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like : "Unbound Gravel". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

Does dirt collect right around anyone else's valve stems?

Old 08-28-21, 12:35 PM
  #1  
Sunshine
Thread Starter
 
mstateglfr's Avatar
 
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 16,699

Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo

Mentioned: 124 Post(s)
Tagged: 0 Thread(s)
Quoted: 11044 Post(s)
Liked 7,595 Times in 4,235 Posts
Does dirt collect right around anyone else's valve stems?

This started a few weeks ago and happens on every ride. No air is noticably escaping during or between rides, and the valves are tight. I now clean the rims after each ride since it's intrigued me.
No big deal, just an odd thing to suddenly happen and continue.

]
mstateglfr is offline  
Old 08-29-21, 09:53 AM
  #2  
Senior Member
 
mihlbach's Avatar
 
Join Date: Dec 2005
Location: Long Island, NY
Posts: 6,644
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 114 Post(s)
Liked 125 Times in 67 Posts
Perhaps there is some residual sealant or water in your rim that is seeping out around your valve stem, making the rim wet in that area.
mihlbach is offline  
Likes For mihlbach:
Old 08-29-21, 07:25 PM
  #3  
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,450
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,749 Times in 2,552 Posts
Are you running tubeless?
unterhausen is offline  
Old 08-29-21, 08:55 PM
  #4  
Senior Member
 
Metieval's Avatar
 
Join Date: Jul 2005
Location: Ohio
Posts: 2,857

Bikes: Road bike, Hybrid, Gravel, Drop bar SS, hard tail MTB

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1218 Post(s)
Liked 298 Times in 214 Posts
No different than the rear of a vehicle that sees gravel/dirt roads.

It's air turbulence, combined with lower air pressure surrounding valve stem. sucks in dust, allows it to settle.

You could glue a fake valve stem onto the other side 180⁰, and it would do same thing.
Metieval is offline  
Likes For Metieval:
Old 08-29-21, 10:23 PM
  #5  
Sunshine
Thread Starter
 
mstateglfr's Avatar
 
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 16,699

Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo

Mentioned: 124 Post(s)
Tagged: 0 Thread(s)
Quoted: 11044 Post(s)
Liked 7,595 Times in 4,235 Posts
Yes, tubeless.
I haven't noticed it in the few years that I've run tubeless, but maybe I was just unaware?
I assume it's the slightest bit of air escaping somehow, even though I haven't been able to measure the difference with my pump.
Oh well.
mstateglfr is offline  
Likes For mstateglfr:
Old 08-30-21, 06:42 AM
  #6  
Full Member
 
Join Date: Aug 2016
Posts: 316
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 64 Times in 48 Posts
My entire bike collects dirt.
veloz is offline  
Likes For veloz:
Old 08-30-21, 10:40 AM
  #7  
Senior Member
 
msu2001la's Avatar
 
Join Date: Mar 2006
Location: Chicago, IL, USA
Posts: 2,893
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 1465 Post(s)
Liked 1,489 Times in 873 Posts
I've never noticed this happening before on my bikes. It seems like you'd see similar smaller patches of dirt around each spoke nipple if air flow was causing this. It doesn't seem like any air turbulence caused by the valve stem would play a role.

Is it doing this on both wheels? I'd suspect some tiny amount of sealant is escaping and collecting dirt. It's also possible that old sealant wasn't completely cleaned off and some residue on the wheel is still attracting dirt.
msu2001la is offline  
Old 08-30-21, 05:39 PM
  #8  
Senior Member
 
Join Date: Dec 2010
Location: northern Deep South
Posts: 8,951

Bikes: Fuji Touring, Novara Randonee

Mentioned: 36 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked 1,972 Times in 1,235 Posts
I haven't seen anything like it on my bikes, but I'm still using tubes.
pdlamb is offline  
Old 08-31-21, 08:16 AM
  #9  
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 29,592

Bikes: Bottecchia Sprint, GT Timberline 29r, Marin Muirwoods 29er, Trek FX Alpha 7.0

Mentioned: 112 Post(s)
Tagged: 0 Thread(s)
Quoted: 5234 Post(s)
Liked 3,608 Times in 2,357 Posts
is it on both sides?
is it on both wheels?
rumrunn6 is offline  
Old 09-01-21, 12:16 PM
  #10  
Senior Member
 
Ghazmh's Avatar
 
Join Date: Jan 2014
Location: The banks of the River Charles
Posts: 2,029

Bikes: 2022 Salsa Beargrease, 2020 Seven Evergreen, 2019 Honey Allroads Ti, 2018 Seven Redsky XX, 2017 Trek Boon 7, 2014 Trek 520

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 696 Post(s)
Liked 910 Times in 487 Posts
Iíve never thought about it until I saw this thread. My rain bike which I recently converted to tubeless does the same thing. I bet itís from sealant slowly leaking from the stem. I do have to top them up every few days.
Ghazmh is offline  

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

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

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.