Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

Newbie Tubeless Question - unseating

Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Newbie Tubeless Question - unseating

Old 01-01-19, 08:19 AM
  #1  
goof1972
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Toronto
Posts: 13

Bikes: 2015 Schwinn Hornet, Pashley Guvnor

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Newbie Tubeless Question - unseating

Hi Guys,

I am noticing that when I set my tires to low pressure (~20-25 psi), the tires would unseat itself quickly. Is this normal? This gets me nervous if
I go riding at low pressure.

I have H Plus Son Hydra rims with Schwalbe G-One tires (33 cm).

Thanks!
Brian
goof1972 is offline  
Old 01-01-19, 10:20 AM
  #2  
dabac
Senior Member
 
Join Date: Mar 2008
Posts: 8,531
Mentioned: 45 Post(s)
Tagged: 0 Thread(s)
Quoted: 1028 Post(s)
Liked 223 Times in 166 Posts
20-25 PSI is MTB territory.
IMO youíre asking for trouble running that kind of pressure on a 33 mm tire.
If not pinch flats, then rim damage.
And yeah, unseating CAN happen. Tires actually coming off is quite rare, but most MTBers running tubeless (at low pressures have at some time ĒburpedĒ a tire.
What MIGHT work for you if you wish to keep pushing the envelope is to build up the rim diameter some. Find a tape thatís a good fit between the rimís brake tracks and layer up. Some use a cellular/spongy tape intended for pipe insulation.
Some cut strips of that thin, bubbly stuff used under floors.
dabac is offline  
Old 01-01-19, 11:11 AM
  #3  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,316 Times in 827 Posts
Tubeless problem?

Yea "burping" is a common problem .. (sew up) gluing the tire to the rim may cure that ..

Cyclo Cross Racing has long used tubular tires , in burp free lower pressures. Its still where the Pros go for tires..






....







....

Last edited by fietsbob; 01-03-19 at 03:01 PM.
fietsbob is offline  
Old 01-01-19, 11:34 AM
  #4  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 12,695

Bikes: 2015 Workswell 066, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 142 Post(s)
Tagged: 0 Thread(s)
Quoted: 6083 Post(s)
Liked 976 Times in 549 Posts
It is perfectly normal for your tires to pop off the rim when you underinflate them dangerously.
Maelochs is offline  
Old 01-01-19, 11:44 AM
  #5  
DrIsotope
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 4899 Post(s)
Liked 1,698 Times in 946 Posts
Hey now-- 25psi might be spot on, if the OP weighs 65lbs.
__________________
DrIsotope is offline  
Old 01-01-19, 11:47 AM
  #6  
Gconan
Senior Member
 
Join Date: Apr 2018
Posts: 649

Bikes: Norco search xr

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 195 Post(s)
Liked 142 Times in 87 Posts
The recommended range of tire pressures are printed or molded on the side of the tire. For example on my 700◊40mm tubless tire it says to inflate from 35-55 psi. Since I am a heavier rider I go 55psi.
Gconan is offline  
Old 01-01-19, 09:06 PM
  #7  
goof1972
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Toronto
Posts: 13

Bikes: 2015 Schwinn Hornet, Pashley Guvnor

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Awesome. Thanks for the info guys! I will pay more attention to the side of my tires (40 PSI) .

Happy this issue is something simple .
goof1972 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
epnnf
Bicycle Mechanics
11
09-16-19 11:58 AM
XXLHardrock
Bicycle Mechanics
6
09-26-18 02:35 PM
elcruxio
Bicycle Mechanics
7
12-03-14 01:18 PM
Rnauth1418
Bicycle Mechanics
2
07-08-14 04:33 PM
ed
Mountain Biking
11
07-23-12 03:57 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 - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.