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  1. #251
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    Surly Knard

    I have velocity A23's and cannot get the knard to seal...too loose on the rim...no problems with others....Running a tube for the knard...whats the secret?
    Quote Originally Posted by williamf777 View Post
    After about 3 months of running my Surly Knard 700x41 on an Ultegra tubless front wheel I finally got it to burp. I had no problems at 35-40psi. Then I forgot to inflate it before my ride and had about 30psi. While traction and bump compliance was killer it burped after I got on the top side of a rut and dropped it back in onto a rock.
    Attached Thumbnails Attached Thumbnails CX Tubeless setup thread-dscn3285.jpg  

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  2. #252
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    WOW! I just got my Surly Knard to seal....but won't seal with Stans sealant...soI'll run it w/o for awhile....

  3. #253
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    Just stepping in to say tubeless CX sucks. After 7 years of trying all the options i'm done. Not reliable for racing. Hello tubulars i'm ready for you and all your glue.
    99% of the problems and questions posted here would be answered if people actually walked into a bicycle shop and asked

  4. #254
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    Quote Originally Posted by 69erEverything View Post
    Just stepping in to say tubeless CX sucks. After 7 years of trying all the options i'm done. Not reliable for racing. Hello tubulars i'm ready for you and all your glue.
    Have you tried tubeless rims with tubeless ready CX tires? If you haven't then no wonder you're giving up.

  5. #255
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    Quote Originally Posted by dan_r_reese View Post
    I just mounted a set of Clement MXPs on Mavic CXP 21 rims. 1 layer of Gorilla tape and Stan's rim strips. I had to take the valve cores out to get the tires to seat. 2 oz of Stans Fluid in each. They lost pressure overnight, but I aired them back up to about 30 psi and took a short ride on pavement and then some soggy grassy trails. I will take them out on some trails this weekend and see how they perform.
    I have ridden this setup 3 times on trails. About 30-35 psi. No burping issues. However, I hit a rock and put a small hole in the rear tire. Stan's would not seal it, it was shooting out of the hole. I used a can of Caffè Latex and it slowly sealed. I had to ride gently home on a squishy tire. It seems to have sealed now, but it would not have been sufficient for a longer ride home.

  6. #256
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    Just another data point....

    Clement MXP 33 (measure 35mm) 30 tpi on Some Alex rim (whatever is stock on Kona Jake the Snake) with a Stan's cyclocross rim strip, no problem. Some pinholes in the sidewall, but no excessive leakage. Rode quite a bit on it.

    Clement USH 35mm (that measure 33mm) 120 tpi on the same Alex rim and Stan's cyclocross rim strip. One tire has sealed up relatively well with one scoop of stan's. The other tire looks like a bulldog has slobbered all over it. Leaks pretty bad from just above the bead. It has 1 1/2 scoops of stan's and a teaspoon of latex mold builder. Haven't rode but a few miles on these.

    Edit, the problem tire finally sealed up.

    Edit #2.....I've gone back to tubes after a mystery flat with tubeless (and it was the tire that sealed up fairly easily, not the problem tire). I cannot recommend Clement tires for tubeless.
    Last edited by Manning; 06-07-2014 at 05:09 PM.
    '15 Giant Anthem SX - '01 Schwinn Homegrown Comp - '12 Giant Defy 1 - '14 Kona Jake the Snake

  7. #257
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    Quote Originally Posted by dan_r_reese View Post
    I have ridden this setup 3 times on trails. About 30-35 psi. No burping issues. However, I hit a rock and put a small hole in the rear tire. Stan's would not seal it, it was shooting out of the hole. I used a can of Caffè Latex and it slowly sealed. I had to ride gently home on a squishy tire. It seems to have sealed now, but it would not have been sufficient for a longer ride home.
    Dan
    I would try adding latex mold builder to Stans, like Manning mentioned above. I had same thing happen to me with a bonty 29-0...unfortunately had to figure out stans wouldn't seal during race

  8. #258
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    Quote Originally Posted by scottz123 View Post
    Dan
    I would try adding latex mold builder to Stans, like Manning mentioned above. I had same thing happen to me with a bonty 29-0...unfortunately had to figure out stans wouldn't seal during race
    I will try that. I was also thinking of trying Orange Seal.

  9. #259
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    Quote Originally Posted by dan_r_reese View Post
    I will try that. I was also thinking of trying Orange Seal.
    Information below provided by mtbr member "dwt"

    "One part mold builder liquid latex ( buy on Amazon or art supply store), 2 +/- parts propylene glycol anti freeze. This is the pink/red colored non toxic stuff used for RV's, not the toxic green stuff used for cars, available at any auto
    Parts store

    This mix will seat and seal a tire, but not so good at plugging punctures. For that, add regular Slime auto tire sealant to the mix

    Now you're good to go"


    I got my mold builder from Hobby Lobby, you can also find it at some Michaels, be sure to look up their 40% off coupons before buying
    Castin' Craft Mold Builder Liquid Latex | Shop Hobby Lobby

  10. #260
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    I've been running Michelin Mud 2's on Stans Ironcross wheels at 30 lbs. I had some problems initially getting them to hold air. I put a tube in to shape the tire, removed the tube (left one bead seated), put soapy water around rim and pumped. I got one tire to pump and had to take the other to the gas station. They worked well through cyclocross season; however, I've done 2 mtb races (with cx categories) with them and I got sidewall gashes (on the rear) and flatted in both races. The second one was very small (Stans didn't seal it).

    I love riding my cx bike in mtb races and wonder if cx tires just aren't made for this kind of abuse (e.g. rocky courses), or whether there are tires that will seat that have stronger sidewalls than the Mud 2's. Thoughts anyone?

  11. #261
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    I blew out a Mud2 on the rear on my CX running tubeless on some old Mavic Reflex rims. No problem at 40psi but tried it at 35ish and lost a bead. I used the Stan's kit. I talked to Michelin and they of course do not recommend running the Mud2 tubeless. They wouldn't comment on whether they are releasing a tubeless compatible tire either. I talked to Stan's and they said the fit of the tire on the rim is crucial. I'm having the wheel rebuilt with a WTB Chriscross rim and will run a Kenda tubeless compatible tire. I will post up after I get the wheel back.
    I have come here to chew bubblegum and kick ass... and I'm all out of bubblegum.

  12. #262
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    Quote Originally Posted by miatagal96 View Post
    I've been running Michelin Mud 2's on Stans Ironcross wheels at 30 lbs. I had some problems initially getting them to hold air. I put a tube in to shape the tire, removed the tube (left one bead seated), put soapy water around rim and pumped. I got one tire to pump and had to take the other to the gas station. They worked well through cyclocross season; however, I've done 2 mtb races (with cx categories) with them and I got sidewall gashes (on the rear) and flatted in both races. The second one was very small (Stans didn't seal it).

    I love riding my cx bike in mtb races and wonder if cx tires just aren't made for this kind of abuse (e.g. rocky courses), or whether there are tires that will seat that have stronger sidewalls than the Mud 2's. Thoughts anyone?
    I had same issue mounting new muds, even using compressor.

    I ran Muds on alpha 340's last year at 27r/25f (?) @ 150lbs with no problems. My teamate (who I bought this wheelset from), could not get muds to stay on his Ironcross, even though they worked on alphas. His thought was that the Irons were a little wider. He has had no problems with specialized captains - not sure about sidewalls

  13. #263
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    With all the options of tubeless compatible tires and tubeless rims why are people still going with unproven methods? I am not trying to be a jerk, I just do not see why people are risking a possible nasty crash with ghetto setups. I have run Kenda Slat Six SCT on both Alpha 340s and Crests with no issues. I have been down to 21 psi f/r on the Alphas without any burps (I weigh 145). My only hope is that some wider options, like 38-44c, that are tubeless compatible start coming out for those of us that do not care about UCI rules.

  14. #264
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    CX Tubeless setup thread

    You make it seem like there are a lot of tubeless ready cx tires. There aren't. The tread patterns that people want don't come tubeless ready.
    99% of the problems and questions posted here would be answered if people actually walked into a bicycle shop and asked

  15. #265
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    Quote Originally Posted by 69erEverything View Post
    You make it seem like there are a lot of tubeless ready cx tires. There aren't. The tread patterns that people want don't come tubeless ready.
    That's okay. Many non-TLR tires will work tubeless just fine, with the right rims.

  16. #266
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    CX Tubeless setup thread

    Just fine isn't good enough.
    99% of the problems and questions posted here would be answered if people actually walked into a bicycle shop and asked

  17. #267
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    Quote Originally Posted by 69erEverything View Post
    You make it seem like there are a lot of tubeless ready cx tires. There aren't. The tread patterns that people want don't come tubeless ready.
    Kenda has six models with one size aleady SCT and a second size listed on their website, so 12 there.
    Hutchinson has 3
    WTB has 1
    Notubes has 2
    Specialized has 4
    Vittoria has 2
    Maxxis 1

    That is 25 possible choices. To me that is a lot.
    I am sure there are tires I am missing too.
    Last edited by offrhodes42; 05-16-2014 at 11:25 AM. Reason: added Maxxis to the list

  18. #268
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    Keep in mind, how many mtb racers actually DO NOT run TR's due to weight, But i could see it on CX wheels, due to set up being more challenging

  19. #269
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    Clement X'Plor MSO 40mm 120tpi working great on Shimano WH-7850 front wheel

    I'm jumping back in with my latest (successful) setup: I scored a near new Shimano Dura Ace WH-7850 front wheel recently (scandium rim, tubeless compatible, no spoke holes, etc) and thought I'd try to set up my Clement X'Plor MSO 40mm 120tpi tire on it for the upcoming Lost & Found race happening near Lake Davis, CA on May 31st.

    From my previous posts/experience, this tire did not like my Stan's 340 rims at all, blowing off the rim around 45 psi. This time I took the tire to 50 psi upon install (no problems), then backed the pressure off to 45psi, & went out for a 4+ hour mixed dirt/single track shakedown ride in Marin this Sunday. ALL GOOD, no burping, no nothing, felt rock solid the whole ride. I used Caffe Latex b/c I hear that's more friendly to the scandium rims. Now I need to track down a matching rear wheel.

    Bike set up is a 2011 Kona Major Jake w/ TRP CX9 brakes, FYI. The 40mm Clements fit front & rear w/ room to spare.

  20. #270
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    Quote Originally Posted by 3daywheelie View Post
    I'm jumping back in with my latest (successful) setup: I scored a near new Shimano Dura Ace WH-7850 front wheel recently (scandium rim, tubeless compatible, no spoke holes, etc) and thought I'd try to set up my Clement X'Plor MSO 40mm 120tpi tire on it for the upcoming Lost & Found race happening near Lake Davis, CA on May 31st.

    From my previous posts/experience, this tire did not like my Stan's 340 rims at all, blowing off the rim around 45 psi. This time I took the tire to 50 psi upon install (no problems), then backed the pressure off to 45psi, & went out for a 4+ hour mixed dirt/single track shakedown ride in Marin this Sunday. ALL GOOD, no burping, no nothing, felt rock solid the whole ride. I used Caffe Latex b/c I hear that's more friendly to the scandium rims. Now I need to track down a matching rear wheel.

    Bike set up is a 2011 Kona Major Jake w/ TRP CX9 brakes, FYI. The 40mm Clements fit front & rear w/ room to spare.
    I am curious why you prefer to ride such high pressures (to me at least). What is your weight?

  21. #271
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    I'm 170lb. 45 psi in a 40mm wide tire when I'm riding rocky/dry/rutted single track at speed doesn't feel high to me, but I'm erring on side of not trashing my fancy new front rim. By squeezing the tire, and that one ride I did, I definitely feel I could case the rim if I got sloppy going fast at 45 psi (hitting a water bar too hard, getting blown off line, etc). Also, the Clement sidewall notes rec'd 55-90 psi for this tire, so I thought I'd start at 45. I'm no expert on this whole "gravel" thing, but 45 felt just about right. Now if I was riding some grassy/muddy euro type cross course on the level, that'd be a whole different story, with a whole different tire...

  22. #272
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    anyone have success with split tube method on cx tires? haven't seen it mentioned but is pretty bomber with mtn tires...looking to set my cx bike up with the non-tubeless tires I already have.

  23. #273
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    I've tried the stans rimstrips, basically the same thing. Definitely helps with looser tires but I wouldn't consider it bomber.
    Yeah I only carry cans cause I'm a weight weenie.

  24. #274
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    Thought I would comment on the combination I've been running for a couple of months now. I'm running Specialized Tracer Pro 2Bliss on Velocity A23 rims (the A23 Pro build wheelset to be precise) with Cafelatex as the sealant. I have to say that I am quite impressed. They hold air much better than the bike did with latex tubes. They are very compliant and fast.

    Mounting was very hard though. I have a 60gal compressor and that would not seat the tire. In the end I mounted them with a tube. That seated the bead into the rim. I left that for a couple of days. Then I deflated the tube and popped/opened only one side of the tire off the rim. I removed the tube and installed the valves. Then I flipped the tire over so that the open side was down so that gravity could help. Then a ful blast of air from the compressor. I had to push it to around 65-70 psi for the bead to then seat again. Then deflate and add sealant through the value.

    On my first ride I was running the wheels at around 30-35psi. I was alarmed at just how much squish there was in the tire and how it can "roll" on the rim. It freaked me out so much that now I tend to run 45psi. It's sill comfy and compliant but I feel it is just a little more secure and it protects my rims from the inevitable rocky trails I ride.

  25. #275
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    Hi everyone. I'm new here. Roadie finally giving CX a try. Team races Trek bikes and the crocketts/boones comes with their Bontrager tubeless-ready wheel. I'm 139-145 lbs depending on the day and interested in CX tubeless. Hearing a lot of negatives but I'd like to see if anyone has experience w/ the Bonty TLR hoops raced with tubeless tires, and what set-ups have worked well for you.

    Thanks for your help.
    Michael

  26. #276
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    Quote Originally Posted by russomc View Post
    Hi everyone. I'm new here. Roadie finally giving CX a try. Team races Trek bikes and the crocketts/boones comes with their Bontrager tubeless-ready wheel. I'm 139-145 lbs depending on the day and interested in CX tubeless. Hearing a lot of negatives but I'd like to see if anyone has experience w/ the Bonty TLR hoops raced with tubeless tires, and what set-ups have worked well for you.

    Thanks for your help.
    Michael
    If you use tubeless specific rims and tires you should have a pretty fool-proof setup. I have both Stan's Alpha 400's and Crests. Currently running Kenda Slant Six SCT tires on the Crests and looking for a more mud specific tire for the second wheelset. I weigh 145 and had the Kenda's on the Alpha 400's last year as low as 21psi. No burping. No experience with the Bontrager rims though, sorry.

  27. #277
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    CX Tubeless setup thread



    Hope Hoops utilising their Pro II Evo straight pull hubs, Stans Alpha 400 rims, Stan's Tubeless kit and Hutchinson Toro CX Tubeless Protect'Air Max tyres. Pretty happy with this setup.

  28. #278
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    Quote Originally Posted by russomc View Post
    Hi everyone. I'm new here. Roadie finally giving CX a try. Team races Trek bikes and the crocketts/boones comes with their Bontrager tubeless-ready wheel. I'm 139-145 lbs depending on the day and interested in CX tubeless. Hearing a lot of negatives but I'd like to see if anyone has experience w/ the Bonty TLR hoops raced with tubeless tires, and what set-ups have worked well for you.

    Thanks for your help.
    Michael
    I have the Boone 5 disc and am in the process of setting up tubeless. I've been able to convert the stock CX3 to tubeless using Gorilla tape and Stans, but can burp by hand at 40 psi. I've switched to a pair of Vittoria XG TNT to see if these are better, and so far they are. I may need to add another wrap of tape as I can still get a really small wisp by hand. The shop I got the bike from didn't recommend the Bonty strips. I've heard that Bonty is coming out with a TLR ready CX tire that Comptom supposedly ran down to 17 PSI.

    Boone is a sweet ride!

  29. #279
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    Quote Originally Posted by tswitz1234 View Post
    I have the Boone 5 disc and am in the process of setting up tubeless. I've been able to convert the stock CX3 to tubeless using Gorilla tape and Stans, but can burp by hand at 40 psi. I've switched to a pair of Vittoria XG TNT to see if these are better, and so far they are. I may need to add another wrap of tape as I can still get a really small wisp by hand. The shop I got the bike from didn't recommend the Bonty strips. I've heard that Bonty is coming out with a TLR ready CX tire that Comptom supposedly ran down to 17 PSI.

    Boone is a sweet ride!
    wait, what??? they DIDN'T recommend the Bontrager rim strips? My experience (albeit limited to one wheelset) with the Bontrager rim strips was absolutely glitch free and super simple to set up the tires. Everything I've ever read about the Bontrager system is that it is one of, if not, THE easiest system for problem-free tubeless setups.

    You need a new LBS.

  30. #280
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    Quote Originally Posted by mudge View Post
    wait, what??? they DIDN'T recommend the Bontrager rim strips? My experience (albeit limited to one wheelset) with the Bontrager rim strips was absolutely glitch free and super simple to set up the tires. Everything I've ever read about the Bontrager system is that it is one of, if not, THE easiest system for problem-free tubeless setups.

    You need a new LBS.
    +1 Only downside is weight compared to other options (stans tape for example)

  31. #281
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    Quote Originally Posted by scottz123 View Post
    +1 Only downside is weight compared to other options (stans tape for example)
    That's funny. The Bontrager strips are a lightweight plastic, not lead. .

  32. #282
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    Yup another fan of the Bonty strips here!

  33. #283
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    Quote Originally Posted by mudge View Post
    That's funny. The Bontrager strips are a lightweight plastic, not lead. .
    And here I thought they were made out of rubber, at least I made you laugh.

    Bonty rim strips = 35g (1.23oz)
    Stans yellow tape = 5g (0.17oz)

    Some would agree this is the most imporrtant place to save weight - rotating mass at the outer diameter of wheel.

    Save 2oz of rotating mass AND spend less $, one of best weight savings per $, if you can get away with stans tape (I do and have no problems)

  34. #284
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    Anyone try WTB TCS on Alpha 340 0r 400 rims? I have found only one mention of of someone using Crosswolf TCS tires on 400's, but everything else I find says the UST bead will be too tight.

  35. #285
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    My newest version of tubeless, got some Nextie 50mm tubeless aero's with Vittoria pro TNT's fitted at 40psi.... feelin sweet.


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  36. #286
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    Quote Originally Posted by ozzybmx View Post
    My newest version of tubeless, got some Nextie 50mm tubeless aero's with Vittoria pro TNT's fitted at 40psi.... feelin sweet.


    Digging that set up Ozzy. Any issues getting them set up tubless?
    If you ever see a turtle on a telephone pole, remember he had help getting there. Is there anything beer can't do?

  37. #287
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    First attempt at cx tubeless, used Mavic Open Pros and Challenge Fangos

    What worked: A couple wraps of fiber (strand) tape, valves, sealant and a little glitter. Inflated right away with just a floor pump.

    What didn't: Thinking I had to set the bead, I jammed the rear up to 90psi before it exploded off the rim, spraying everything in the garage with glittery sealant and leaving me functionally deaf.

    Ultimately, they were much less work than tubulars. I set them at 40psi and raced a pretty dry course yesterday. They held up despite some nasty hits and rolls that had me wondering. I don't think I would trust them much below that pressure so we'll see as the season progresses.

  38. #288
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    Quote Originally Posted by chuckie33 View Post
    Digging that set up Ozzy. Any issues getting them set up tubless?
    None at all, track pump set up first time. Got quite a few K's on them now with no issues.
    Trek 9.9 Superfly SL
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  39. #289
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    Quote Originally Posted by Sizzler View Post
    I set them at 40psi and raced a pretty dry course yesterday. They held up despite some nasty hits and rolls that had me wondering. I don't think I would trust them much below that pressure so we'll see as the season progresses.
    Running at 40psi defeats going tubeless as I can run clinchers with tubes at that pressure without flat issues. A reliable tubeless setup should get you into the mid 20psi range. I weigh 145lbs and can go down to about 21psi with Kenda Slant 6 SCT tires on Alpha 400 and Crest rims...and I only run yellow tape on the Alphas.

  40. #290
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    Quote Originally Posted by offrhodes42 View Post
    Running at 40psi defeats going tubeless as I can run clinchers with tubes at that pressure without flat issues. A reliable tubeless setup should get you into the mid 20psi range. I weigh 145lbs and can go down to about 21psi with Kenda Slant 6 SCT tires on Alpha 400 and Crest rims...and I only run yellow tape on the Alphas.
    Yes and no. The course I raced was fast and dry, I would have run 40 in my tubulars as well. But, Open Pro's aren't designed to be tubeless rims, so I wouldn't really consider them reliable to begin with. Like you, I have Crest rims with yellow tape on my mtb and wouldn't hesitate to run lower pressures on them because that's what they're made for. I'll just have to experiment with lower pressures until I know exactly how low I can get, but until then I'll sacrifice some psi for reliability in a race.

  41. #291
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    CX Tubeless setup thread

    Sorry must comment - @145# I agree you should be able to get to low 20s - but that is entirely based on rider weight and tire size - I can't run a tubed cross tire at 40 without pinch flatting but I can run tubeless there so it is an advantage.


    "The trick, and oh, what a trick it is, is to remain consciously blind to the danger that surrounds you, and simultaneously hyper-aware of every hard bit of pavement or sharp bit of metal that enters your air space. This is the Zen koan of riding your bicycle on the road." Robot, Red Kite Prayer - rkp.com - October 20, 2011

  42. #292
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    CX Tubeless setup thread

    If you look at sizzler's setup, looks like burping would be an issue when the pressure is in the low 20 psi...

    Maybe a Stan's rimstrip may help him to reduce the pressure


    Sent from my iPhone. There may be horrible grammar and misspelling involved

  43. #293
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    Quote Originally Posted by Sizzler View Post
    Yes and no. The course I raced was fast and dry, I would have run 40 in my tubulars as well...
    That may be so, but you shouldn't run them that high, unless you just want higher rolling resistance, less comfort, and less grip. It's your call, ultimately.

  44. #294
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    Quote Originally Posted by mudge View Post
    That may be so, but you shouldn't run them that high, unless you just want higher rolling resistance, less comfort, and less grip. It's your call, ultimately.
    Won the race, so it seems to have been the correct choice.

  45. #295
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    Quote Originally Posted by Sizzler View Post
    Won the race, so it seems to have been the correct choice.
    Might have been an okay choice, under the circumstances. Doesn't mean it was the best choice. The science on rolling resistance and traction, re: inflation, is pretty compelling.

    Congrats on your win, btw

  46. #296
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    Quote Originally Posted by mudge View Post
    Might have been an okay choice, under the circumstances. Doesn't mean it was the best choice. The science on rolling resistance and traction, re: inflation, is pretty compelling.

    Congrats on your win, btw
    Thanks, do you happen to know any good articles or info about psi as it relates to rolling resistance, traction, etc? I'm interested to hear more. I've experimented a bit with low pressures in my tubs and personally felt it makes the bike handle less predictably and felt slower on hard surfaces, but clearly provides traction benefits in sloppy, wet conditions.

  47. #297
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    Quote Originally Posted by Sizzler View Post
    Thanks, do you happen to know any good articles or info about psi as it relates to rolling resistance, traction, etc? I'm interested to hear more. I've experimented a bit with low pressures in my tubs and personally felt it makes the bike handle less predictably and felt slower on hard surfaces, but clearly provides traction benefits in sloppy, wet conditions.
    You can start by searching L. Zinn's articles on Velonews. They often contain links to the actual research. I believe it was J. Powers who also wrote recently about getting over the concerns about squishy tires.

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    Schwalbe had a research paper about lower pressures aimed at mtb setups. I have the pdf saved on my home desktop. They have the conclusion, so to speak, on their website:
    Rolling resistance - Schwalbe Professional Bike Tires

    I believe there are limits, obviously, as a flat tire is not the fastest and eventually going too low you lose support of the tire and it likes to get squirmy under cornering loads. Going from a good grass pressure onto paved corners can be scary as **** sometimes. Had this happen to me in a training ride last night with a new set of tires that like higher pressure (mid to high 30's) whereas my old setup loved the 30 psi range (I'm 220 lbs for reference).

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    Good stuff, thanks!

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    I setup the Crest 29 wheels with Hope Pro 2 EVO Hubs from my MTB on my Cross Bike with a set of Michelin Mud 2 tires last night to try in our first cross race of the season this Sunday. With the Hope hubs it was a very easy to switch the hubs from 15mm and 142x12 to QR 9mm.

    CX Tubeless setup thread-img_20140919_182343.jpg
    Current bikes:
    2015 Framed Alaskan Carbon
    2015 Framed Alaskan Alloy
    2012 Trek Superfly 100 AL Pro
    2014 Giant TCX SLR2

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