Tubeless-Compatible Barlow Pass 700C x 38 mm

Tubeless-Compatible Barlow Pass 700C x 38 mm


First, I want to apologize that several Compass tire models are out of stock. Orders from our distributors in Europe and Japan have exceeded our expectations, and tire production has to be scheduled long in advance… The tires now are on a boat to Seattle. We should have all models back in stock toward the end of the month. Until then, we appreciate your patience. We’ll put up an announcement when the new tire shipment comes in.
That shipment also includes the new Barlow Pass tubeless-compatible tires. Not only did we change the bead to a tubeless-compatible one, but we also increased the size by 1.5 mm to make it a true 38 mm even on narrow rims. The photo above shows a prototype. Mounted with a tube on a narrow rim, it measures 37.5 mm. On a 30 mm-wide rim and mounted tubeless, it “grows” to 40 mm. That puts it right in the middle between our 35 mm Bon Jon Pass and the 44 mm Snoqualmie Pass. The new Barlow Pass is another great addition to the Compass range. If you want to run your tires tubeless, it’s definitely worth the wait.
Click here for more information about Compass tires.

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Comments (34)

  • Peter

    I love riding the Jon Bon Pass (EL) tyres tubeless, but these are a rather close fit with 45mm (Velo Orange) mudguards. Any chance that the next iteration of Stampede Pass will be tubeless-compatible too?

    April 6, 2017 at 4:53 am
    • Jan Heine, Editor, Bicycle Quarterly

      Our goal is to have most Compass tires tubeless-compatible in the future, but we are doing one project at a time. That way, we can apply the lessons learned with one tire to the next.

      April 6, 2017 at 7:44 am
      • Wilfried531

        What a good news, can’t wait for tubeless Babyshoe Pass !

        April 6, 2017 at 7:59 am
  • Rod Holland

    Jan, sounds like progress. A perhaps perverse question: do you have any of the older-design Barlow Pass tires in stock? If so, how do we go about order those? I ask because I am very fond of the original Barlow Pass, and prize their ability to be changed bare-handed, on the road. I’ve encountered the tubeless-ready beads on a couple of other Compass models, and found them a little rebarbative at first (although I’ve gotten used to them now). With the Barlow Pass soon-to-be-if-not-already transmogrified, I’d buy a couple of the older design if I could (needless to say, for use with tubes). Please advise if this is still possible.

    April 6, 2017 at 7:21 am
    • Jan Heine, Editor, Bicycle Quarterly

      We have very few of the old model left. You may check dealers and see whether they still have stocks. I know that 2-11 Cycles in France still has a few of the older model…

      April 6, 2017 at 8:40 am
  • Rider X

    THANK YOU!!! I typically run Barlow Pass tires on my daily rider/commuter and have been quietly praying for this this upgrade for a while as I run tubeless on other bikes and like it. I was even thinking of moving up a size to the Snoqualmie Pass tires, but now I can go tubeless without altering my setup (I was going to need new fenders to get the proper clearance). Just in time too, as I am about to hit 7500 km on my Barlow and I don’t think they will last too much longer. Good thing I have been rotating them as I can replace both without guilt!

    April 6, 2017 at 8:31 am
  • John Thurston

    Is there some molding mark or distinction the unwashed masses may use to distinguish Barlow Pass Mk1 and Mk2? When I’m rooting around in my tire stash five years from now, and pluck out a Barlow, how may I distinguish the versions?
    I realize I could mount it on a rim and ride it. If it blows off on a bump it probably wasn’t tubless-ready. I’m hoping there is a simpler way.

    April 6, 2017 at 9:03 am
    • Jan Heine, Editor, Bicycle Quarterly

      We thought of that, too. It’s standard practice to identify different models clearly. The logo of the “tubeless-compatible” tires will carry the letters “TC” after the size in the future.

      April 6, 2017 at 10:19 am
  • Bill Gobie

    How do you increase the size of a tire? Did you have to build a new mold?

    April 6, 2017 at 9:18 am
    • Jan Heine, Editor, Bicycle Quarterly

      New mold. The bead shape is different anyhow, so it’s not like you can just start making tubeless-compatible tires with the tooling you have.

      April 6, 2017 at 10:20 am
  • igxqrrlSam

    I (and, it seems, many others) really value the work BQ did on wide tires and supple sidewalls. Most of my road bikes are now on Compass tires.
    I’d love to see a similar analysis done for tubeless vs. tubed tires. From what I can see, the hype is strong for tubeless, but based on my experience with MTB tires I’m guessing it’s largely unwarranted.

    April 6, 2017 at 9:26 am
    • Jan Heine, Editor, Bicycle Quarterly

      We are working on that. One undeniable advantage of tubeless is that you don’t risk pinch flats any longer. But on pavement, most of us run tires wide enough that pinch flats simply don’t happen any longer. On gravel, it’s a different matter.
      As to the speed advantages, you replace a very supple inner tube with some liquid. Which slows the tire more? We’ll test to find out. As to comfort, again, with the wide tires we now run, the differences aren’t noticeable, at least for me. (I’ve run the same tires on the same bikes with tubes and tubeless.) The sealant will seal small holes, so a tubeless setup gets fewer flats. (You could probably add sealant to an inner tube, and probably would get the same effect, but we haven’t tried this.)
      The drawbacks of tubeless are the more difficult setup, the tighter tolerances it requires between rim and tire (there is no tube that reinforces the joint), and the need to replenish the sealant periodically.

      April 6, 2017 at 10:25 am
      • Bob C

        I run Babyshoe Pass tires with tubes and sealant and I’ve been extremely pleased with the results. No flats in a long time. I’m not sure of there is a performance hit, but it seems to me if there is a performance penalty it’s quite small.

        April 8, 2017 at 11:54 pm
    • Peter

      I too would love to see a “proper” test. Last weekend I got a puncture that the sealant would not close when pressure got over 2 bar (29psi) and I had to mount a tube in order to ride with 3.3 bar / 48psi. Highly subjective, but with the tube mounted the ride seemed harsher than before. Mind you, this was in the UK, your choice of pavement is course, extra course or find-your-way-between-the-potholes 😉
      Mounting the JB Pass (EL) for the first time was an ordeal, first time ever I needed a bead jack to mount a tyre. Fortunately after a few months riding mounting was perfectly doable with just using my hands.

      April 6, 2017 at 11:45 pm
      • Jan Heine, Editor, Bicycle Quarterly

        If you use tubeless-ready rims, make sure the bead is in the well (center of the rim bed) all around before you try to lift the last bit of bead over the hook. With supple tires, it’s easy for the bead to sit on the shelf in one place, which makes mounting very difficult.

        April 9, 2017 at 10:53 am
      • morlamweb

        I, too, would love to see tubeless tires and wheels go under the BQ microscope. I’ve read quite a few anecdotes about tubeless but there’s precious little hard, BQ-quality information about them out there.
        Lightweight wheels with tubes and light, wide, supple, low-pressure tires already gives me excellent ride quality and speed, and I need only purchase better tires if I find a better option. In fact, I may buy a set of Rat Trap Passes, as they appear to be better still than my Schwalbe Marathon Supreme 50-559s. However, if I were to go tubeless, I’d have to buy new tires, of course, but also modify or replace my wheels; buy sealant; and perhaps a tire installation tool. Unless tests bear out that a tubeless setup has a marked advantage over tubes, I’ll stick with what I’ve got.

        April 10, 2017 at 10:51 am
        • Jan Heine, Editor, Bicycle Quarterly

          We are working on tests of tubeless performance. In the mean time, unless you get pinch flats, I’d stick with what you got! In any case, a more supple tire will give you much greater speed benefits than any potential advantage of going tubeless.

          April 10, 2017 at 11:02 am
      • Jan Heine, Editor, Bicycle Quarterly

        It’s interesting that at lower pressures, tubeless seems to be slower than a tire with tubes. On real roads, you may see reduced suspension losses with tubeless tires, but if anything, this suggests that any performance differences with tubeless will be very small.

        April 12, 2017 at 8:40 am
  • Gregory Birch

    Distributor in Japan? Do you know where they will be available?

    April 6, 2017 at 2:27 pm
  • Glen Stickley

    On the Compass web site for each tire size there is an overview page. It would be handy if on this overview page you could see if a tire was tubeless compatible or not. A “TC” in the title of tubeless compatible tires would work.

    April 6, 2017 at 3:19 pm
  • Rick Thompson

    Jan – Encouraged by your research, I have just placed a deposit on my first custom frame. The plan is to build it for the 700C x 44 Snoqualmie Pass tires. I realize no guarantees in life, but are you planning to continue production of these for the foreseeable future?

    April 6, 2017 at 5:15 pm
    • Jan Heine, Editor, Bicycle Quarterly

      We plan to continue producing all our tires, and the Snoqualmie Pass is a popular model.

      April 6, 2017 at 10:22 pm
      • Rick Thompson

        Great, thank you. If I may ask another tire question: A recently acquired Santana tandem came with 29 mm tires, we have been running 100 psi. Bon Jon Pass 35s would fit, but wheel loads are ~200 lb which is off the Berto chart. Should we get the ultralight or standard casing? What pressures would be safe to try? (Sorry, that was 2 questions.)

        April 9, 2017 at 5:18 pm
        • Jan Heine, Editor, Bicycle Quarterly

          The Bon Jons are rated to 90 psi, which should be enough. I’d start with that, then reduce until the handling starts to feel a bit wallowy. Use the standard casing – the Extralights require about 10% high pressure, and you are already reaching hte max…

          April 9, 2017 at 7:08 pm
  • Matthias Krogmann

    Distributor(s?) in Europe? You’ve mentionted 2-11 cycles in France, is there may be a source in Germany?
    Thanks.

    April 9, 2017 at 10:34 am
    • Jan Heine, Editor, Bicycle Quarterly

      Daily Bread in Berlin will distribute Compass tires in Germany. Breetbikes is our distributor for the Benelux, while 2-11 Cycles does France and southern Europe.

      April 9, 2017 at 10:54 am
  • Jim

    I’ve been running Baby shoe standard casings for a year now tubeless with Velocity Blunt SL rims and they work great. My only problem was not keeping the sealant full in the rear and had to run a tube to get home. But then inspected the rim and found cracks around the spoke nipples so it was a good thing to get that flat.

    April 9, 2017 at 7:21 pm
  • Nathan

    Great news!
    Is there a chart somewhere showing the expected outer diameters of wheels with different Compass tyres installed?

    April 11, 2017 at 2:59 pm
    • Jan Heine, Editor, Bicycle Quarterly

      That is a good idea. The diameter depends on the rim width, but we can provide approximate numbers. We’ll work on that.

      April 12, 2017 at 8:58 am
  • Stuart

    Does the tubeless model differ in weight from the previous model?

    April 12, 2017 at 1:04 am
    • Jan Heine, Editor, Bicycle Quarterly

      Since it’s a bit wider, it’ll be a tad heavier. We’ll weigh the new model when we have the production tires in stock.

      April 12, 2017 at 7:28 am

Comments are closed.