Tire won’t seat. Tried every trick

Discussion in 'The Perfect Line and Other Riding Myths' started by HOTPASS, Mar 31, 2018.

  1. HOTPASS

    HOTPASS F*ck cancer.

    Joined:
    May 30, 2014
    Oddometer:
    1,723
    Location:
    Pollock pines, CA
    so this is a dumb situation.

    I’ve changed countless tires with no issue, but this wheel for my new front end will not seat a bead on any tire. I’ve tried two different tires now.

    Here is a run down of the tricks I’ve tried:

    Various lubes
    Over 100psi
    Leaving tire in sun and heated with heatgun
    Sit over night over inflated.
    Hammer on tire lightly and over inflated
    Ratchet strap around tire.
    Bounce tire lightly and over inflated.
    Remove /reinstall tire countless times.
    Inspect and polish/sand any imperfections in the rim lip.
    Lightly and over inflated ride the bike a few hundred feet.


    My question is could the rim itself be causing this? It’s an aftermarket “pro-wheel” rim laced to a RM250 hub. I’ve trued the wheel to within 1-2mm run out on each axis. About as good as ya gonna get being a used wheel, and my stock DR wheel was worse and held tires fine.

    Ima gonna 2nd amendment all over this wheel soon.
    #1
    Benduro likes this.
  2. Jbrjbr21

    Jbrjbr21 Been here awhile

    Joined:
    May 17, 2017
    Oddometer:
    370
    Location:
    Marion Il
    Aftermarket wheel must be the problem, possibly too big?
    #2
  3. HOTPASS

    HOTPASS F*ck cancer.

    Joined:
    May 30, 2014
    Oddometer:
    1,723
    Location:
    Pollock pines, CA
    It’s a 1.60 rim.

    Mounting 90/90/21 tires as that’s what I have on hand. I’ve mounted those tires on 1.60 Rims a handful of times without issue.

    I’m really stumped. If the rim was a taco I could see it possible,but 1-2mm runout, im Just not seeing it.
    #3
  4. DavidR8

    DavidR8 Wanna-be ADV rider

    Joined:
    Jun 14, 2013
    Oddometer:
    232
    Location:
    Victoria, BC, Canada
    I know less than nothing about this but are all rims made to the same bead profile?


    Sent from my iPhone using Tapatalk
    #4
  5. sandychain

    sandychain Adventurer

    Joined:
    Apr 1, 2014
    Oddometer:
    44
    Lube, lots of lube.
    #5
    HOTPASS likes this.
  6. nevermind

    nevermind Slower, then Molasses

    Joined:
    Jul 26, 2008
    Oddometer:
    3,429
    Location:
    Out back...
    You have to remove the valve stem to seat some tires.... Make sure your compressor is set to max psi too!

    As mentioned above, lube, lots! I use Windex in a spray bottle. Cleans up nicely and is slippery enough when wet to get the job done.
    #6
  7. HOTPASS

    HOTPASS F*ck cancer.

    Joined:
    May 30, 2014
    Oddometer:
    1,723
    Location:
    Pollock pines, CA
    I’ve tried so much and so many types of lube I even started raiding the under the bed special box.

    :hide
    #7
    redneckK20, Jur1, FJ Fun and 4 others like this.
  8. HOTPASS

    HOTPASS F*ck cancer.

    Joined:
    May 30, 2014
    Oddometer:
    1,723
    Location:
    Pollock pines, CA
    Didn’t mention that, but yea that’s my usual technique. Remove valve stem and inflate with rubber tipped airggun.

    My compressor tops at 120psi. It’s oldet than me, but it should be plenty. I’ve beaded knobby Moto tires with a bicycle pump.

    Windex is my jam as well even keep a small 1oz bottle on my trail kit.
    #8
    Benduro likes this.
  9. Strong Bad

    Strong Bad Former World's Foremost Authority

    Joined:
    Oct 29, 2007
    Oddometer:
    9,083
    Location:
    Omicron Persei 8
    Pics of what it looks like at 100psi "not seated" would help us. Not being able to see what you are dealing with make it hard for us to judge if it is actually seated or not.

    Is it even all the way around or uneven?
    #9
    sieg likes this.
  10. HOTPASS

    HOTPASS F*ck cancer.

    Joined:
    May 30, 2014
    Oddometer:
    1,723
    Location:
    Pollock pines, CA
    By not seated I mean,As soon as I deflate the tire I can squeeze the beads of the tire back into the rim valley with two fingers, where as one any other tire I’ve ever changed, including the exact tire on a different rim, breaking the bead take tremendous leverage.

    It’s fairly even all around, just not popping over the lip of the rim...thus “seated”.

    Again. I’ve changed probably a hundred tires by hand. first time I’ve had this issue this bad. Usually a few bounces and it’ll pop. That’s why I’m curious if it’s the rim itself somehow.
    #10
  11. DavidR8

    DavidR8 Wanna-be ADV rider

    Joined:
    Jun 14, 2013
    Oddometer:
    232
    Location:
    Victoria, BC, Canada
    By “exact tire” you mean the tire that won’t seat will seat fine on another rim?



    Sent from my iPhone using Tapatalk
    #11
  12. lnewqban

    lnewqban Ninjetter

    Joined:
    Jan 22, 2012
    Oddometer:
    836
    Location:
    Florida
    I would use a strip of paper to compare the perimeter of the old and new rims, measured around the seat of the beads.
    #12
    Alexander B, Jbrjbr21 and DavidR8 like this.
  13. RT66AZ

    RT66AZ Been here awhile

    Joined:
    Oct 4, 2014
    Oddometer:
    179
    Bead lock ?
    #13
  14. Strong Bad

    Strong Bad Former World's Foremost Authority

    Joined:
    Oct 29, 2007
    Oddometer:
    9,083
    Location:
    Omicron Persei 8
    It almost sounds like you are comparing the seating of a tubeless tire to the seating of a tube tire. The friction of the tire bead to the rim does not hold the tire on the rim, the air pressure of the tube tube does. Like RT66AZ says use a rim lock.
    #14
    sieg likes this.
  15. dogsslober

    dogsslober No neck tie, Ti neck

    Joined:
    Feb 10, 2009
    Oddometer:
    2,722
    Location:
    Morgan Hill Ca
    tubed or no tube ? wd40 the tire put up to 100psi put it out in the sun for a while see if it will seat then
    #15
  16. Bar None

    Bar None Old School Dude

    Joined:
    Mar 2, 2007
    Oddometer:
    10,815
    Location:
    WNC SWFL
    So you are saying that the tire will hold air but when you let the air out you can squeeze the beads back with two fingers? Seems like the rim is wrong for the tire.
    #16
    wmfleet2 likes this.
  17. foxtrapper

    foxtrapper Long timer

    Joined:
    Sep 6, 2011
    Oddometer:
    2,831
    If the tires are failing to pop up over the rim and push against the flanges, I'd suspect the rim of being slightly over sized in diameter.

    If the tires are popping up and pressing against the flanges when inflated, but fall back off easily when deflated, I'd suspect the rim of being slightly under sized in diameter.
    #17
    Motopsychoman and lnewqban like this.
  18. OrangeYZ

    OrangeYZ Long timer

    Joined:
    Feb 11, 2008
    Oddometer:
    1,546
    Location:
    Southern Oregon
    Deflating to zero or deflating to a pressure that you want to ride at?
    #18
  19. 350Rizzer

    350Rizzer Been here awhile

    Joined:
    Mar 25, 2016
    Oddometer:
    173
    Location:
    South Park
    Maybe the rim strip is getting stuck between the bead and the wheel?
    #19
  20. bungie4

    bungie4 Frostback

    Joined:
    Jan 15, 2009
    Oddometer:
    654
    Location:
    Sudbury Ontario
    Bead Blaster at your local tire dealer.
    #20
    mississippimadman, EastRoad and Richy like this.