Results 1 to 7 of 7

Thread: Stan's No Tubes again

  1. #1
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    Stan's No Tubes again

    ok, so I forgot how much work it was to do this last time...

    I just finished converting my front wheel to tubeless.

    I had done it on my other bike a while back and remember it working very well until I got stupid about ultra-low tire pressure. I subtracted 2 lbs. each ride til I was riding 24-26 lbs. (I forget) in the front tire... at MAINLAND! I finally found the point at which it didn't work for my tire/rim combination and pulled the bead loose on a sketchy low-speed downhill turn when the sidewall folded over and a bit of muck got between the bead and the rim.

    Before the incident it felt fine and was really hooking up for traction and floating over rocks for suspension action.

    That time, I just popped in a tube and never took the time to clean out the rim and try again later.

    Then, also at Mainland (I sense a pattern, here) I tore a hole in the rear tire casing on a sharp rock. I think I had about 32 lbs. that time. I really don't think it was the pressure so much as the cheap tire - 66 tpi IRC Mythos XC 2.1 I got from PricePoint for $25 - per pair!

    Anyway... I'll report here from time to time on the progress of my testing. And, I'll keep a detailed journal in my toolbox of daily tire pressures, etc.

    I did remember this much: riding around on tubeless tires that cost $22 to convert (for 3 so far and the 4th as soon as my forearm isn't sore anymore from scrubbing off the adhesive from the old rim tape). I just keep thinking: "Cool. I have no tubes. Ha!"
    what goes up, gets to come back down

  2. #2
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    Flat Creek report

    Rode the Stan's tubeless front tire - back tire still in the works 'cause I need to have Carlos lace up another Sun Sub IV rim - At Flat Creek on Sat.

    Set the pressure at 34 lbs. and it passed with flying (literally) colors. There were 3 flats between 6 riders that day but not on my bike. I guess one flat may not count since it was in the parking lot.

    Could have run lower pressure, but didn't need to for traction as the front tire stuck it well enough to do 37.7 mph on the finishing downhill while leaping ledges and testing my limits on turns.

    From pre-ride Sat to pre-ride Sun, the tubeless front tire leaked 1.5# and the tubed rear tire leaked 2#.

    Sat night, Carlos trued my wheels and told me I had the front hub on backwards 'cause the hub label was upside down if looking down from the saddle. Whatever...

    Rode with the front IRC Mythos XC 2.1 (cheap 66tpi Tiawan version) facing backwards at MAC. Surprising good traction in loose over hardpack conditions. I guess I'll turn it back around for comparison purposes and lower rolling resistance... but I'm tempted to leave it alone cause it really stuck in turns today.

    Maybe it was the 31.5# pressure. Ran 39.5 in the rear with a tube and spun the sucker a bit on the Airport Time Trial climb under the oak tree and on Stinky's sidehill climb before it.

    Awesome feel on the very Stinky, new "Higher Way" (as in you must be high) downhill line into Mercy.

    Laters.
    what goes up, gets to come back down

  3. #3
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    5 rides update

    5 rides with the renewed Stan's No Tubes front wheel - no problems. I even unmounted and turned it around to comply with Carlos' read the label directions with no problem.

    1 flat in the same amount of time for the tubed rear wheel. I hate flats - it robbed me of 8:50.25 worth of ride time.

    THREE thorns this time. Most likely riding John Bank's mudhole bypass trail at MAC (especially in the dark with no lights) is hard on tubes. A slow leak from a prickly pear thorn for a couple days, then turned into a medium slow leak during a ride.

    Note: going down around 30# doesn't feel right in sticky conditions, as it's slow x slow = slow squared. A shot from the big air can to 40# felt better. I figure I'll try 40# front and rear for a while, as it's the recommended pressure from Stan and the low end of the range for the tires.

    Just saw that Stan started shipping his liner-stem combo for $20 per wheel. I may try that instead of lacing up the Sub IV with new spokes. He says it works for all 22mm standard rims.

    I've found that my Stan's wheel loses about 1# per 24hrs., whether riding or not.
    Last edited by been_jammin; 03-22-2002 at 03:50 PM.
    what goes up, gets to come back down

  4. #4
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    10 rides

    10 rides on the Stan's tubeless conversion front wheel: no problems

    back tire has had one more flat - thanks Mark T. for the use of your floor pump at MAC - this time a pinch flat from a little chicken-neck stumplet in the trail

    damp conditions at MAC tempted me to put more pressure in both tires for lower rolling resistance - about 50# Man, I feel fast!

    left 'em at about 48# for Mainland and MAC - felt better than the 40# at Comfort in terms of rolling speed with very little noticeable degradation of traction - back is spinning a little more

    previously noticed that at low pressure (30#), the front tire had trouble biting in turns - I think maybe the side-edge knobs
    weren't being supported by inner air pressure enough to make 'em dig in

    my Topeak minipump will not put air into the tubeless tire without letting some out at the same time by wiggling the stem too much... CO2 works super and so does my air can at the house via hose

    I bet the new Stan's liner with attached stem wouldn't have the same problem, and I may get one to see if I can convert my other wheels that way since the tire bead wouldn't take on it (Sun 17c), but took just fine on the Sun Sub IV
    what goes up, gets to come back down

  5. #5
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    15 rides and 2 races

    I'm still thinking Stan's is so cool. The front tire held up at Comfort for the TT and XC in knarly conditions.

    By now, however, I don't worry about the tubeless thing and just rode hard. Because of the slick, muddy conditions I slammed more rocks and roughed up the sidewalls a bit drifting through turns til I bumped whatever was on the trail's edge.

    I rode at 40-42 lbs of pressure to fight off the rocks and roll fast despite accumulating mud.
    what goes up, gets to come back down

  6. #6
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    sidewall bubble found during post-ride wash

    my front tire may be toast

    after scrubbing off the crud, I discovered a sidewall bubble/loose spot on the tire bead on the front tire

    at this time 30 - 40 lbs of pressure will blow the bead off the rim at that spot and the tire looses pressure

    a possible fix at the bead will be to clean away all the old, hardened liquid latex at the bead - it pulls away with your finger - and try again

    however, with the sidewall bubble at the same spot... the tire may no longer be tubeless-eligible

    in fact, it may not even be tube eligible, which I'll probably check first so I can ride with Shonny this evening
    what goes up, gets to come back down

  7. #7
    violent femme been_jammin's Avatar
    Join Date
    Jul 2001
    Location
    Between Mud Creek Park and Mac
    Posts
    412

    follow-up on sidewall bubble

    tire is toast, at least on Sun rims (narrow)

    removed all old latex and tried tubeless - no go
    tried with tube - no go
    in both cases the bubble came back

    put the tire on my old beater Trek with the monster-heavy single wall rims that are wiiiide - go

    slapped on Maxxis Mimo's with tubes... next stop - tubeless again
    what goes up, gets to come back down

Remove Ads

Search tags for this page (caching method: table)

There are currently no search engine referrals.
Click on a term to search our site for related topics.

Bookmarks

Posting Permissions

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