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  1. #1
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    What tubeless pressures do you run?

    I am 245ish lbs with Bontrager Race Lite wheels and Conti X-King tires. I ran 40psi on my XR-1 tubed tires and hoping to run less with this tubeless setup. Don't want to burp flat. Any larger guys able to chime in on pressure recommendations?

  2. #2
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    I'm "only 215", but might suggest 35psi rear and 30psi front. See how it works for you and then try dropping a psi or 2. Use an electronic gauge to get readings as accurately as possible and check tire pressure every time before you ride, because with tubeless it's not uncommon to lose air. I run 27-30psi rear and 23-25psi front, depending on terrain. Occasional burp, but no big deal.

  3. #3
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    I'm 225 and I run 30 front and rear on mine. No issues so far.

  4. #4
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    I'm 250 and I run 30 psi front and 35 rear running Bontrager 29-3 tires on Duster wheels.

  5. #5
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    Re: What tubeless pressures do you run?

    I am 230 geared up, running 30lb in a 2.3 Purgatory front and 34lb in a 2.2 Captain rear on Mavic Crossmax wheels. Very predictable and reliable.

    Sent from my Android in the great outdoors.

  6. #6
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    I ran about 32 front/35 rear and they feel more firm than when I ran 40/40 with tubes. Must be the tire...

  7. #7
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    What tubeless pressures do you run?

    29 2.0 captains, 30 rear, 25 front. 260 with gear.

  8. #8
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    230 with gear here...I am running 28 front and 32 rear (depending on trail/conditions) on Stan's Arches with Conti X King with no issues...love them

  9. #9
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    Re: What tubeless pressures do you run?

    220 naked here. Riding the protection model x kings. With both at 2.2 24 f / 27 r was the sweet spot for me. Switched to 2.4 up front and still haven't touched the rim despite going down into the teens. Thinking I need to get to 16 or so.
    Yeah I only carry cans cause I'm a weight weenie.

  10. #10
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    Quote Originally Posted by Alias530 View Post
    I am 245ish lbs with Bontrager Race Lite wheels and Conti X-King tires. I ran 40psi on my XR-1 tubed tires and hoping to run less with this tubeless setup. Don't want to burp flat. Any larger guys able to chime in on pressure recommendations?
    Start with the NoTubes "suggested" formula:

    Rider Weight in pounds divided by 7 = x

    x - 1 = Front tire pressure in PSI

    x + 2 = Rear tire pressure in PSI

    Example: 245lb rider


    245/7 = 35

    Front tire pressure: 35 - 1 = 34 PSI

    Rear tire pressure: 35 + 2 = 37 PSI

  11. #11
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    About 340 with gear. 25 psi front Ardent 2.4, 27-28 psi front 2.35 Nobby Nic, 25 psi rear 2.5 WTB Dissent, 28-30 psi hans dampf 2.35. These are all 29er tires.

  12. #12
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    I have been running tubed tires tubeless for the past season and run 38 psi in the rear. Higher than most posters but the tire feels like its flat running lower pressures. I'll try running tubeless tires (thicker casing) and see I can run lower psi then.

  13. #13
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    About the same size as the OP and put me in the 27-35 crowd on Mavic UST wheels and tubeless ready tires. Rolls well on hard-pack and deforms well while rock crawling the climbs.

  14. #14
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    Quote Originally Posted by BruceBrown View Post
    Start with the NoTubes "suggested" formula:

    Rider Weight in pounds divided by 7 = x

    x - 1 = Front tire pressure in PSI

    x + 2 = Rear tire pressure in PSI

    Example: 245lb rider


    245/7 = 35

    Front tire pressure: 35 - 1 = 34 PSI

    Rear tire pressure: 35 + 2 = 37 PSI
    It was probably partially because the brand new tires got worn in a bit and lost whatever is on them when they're new that makes them slick, but this combo of pressures was amazing for today.

  15. #15
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    I'm 201 lbs and run 23 in front and 25 in the back. I'm running 2.25 Nobby Nics 29x2.25.
    2011 Felt Z5
    2012 Felt Nine Race
    2013 Felt Edict Nine

  16. #16
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    Quote Originally Posted by Alias530 View Post
    It was probably partially because the brand new tires got worn in a bit and lost whatever is on them when they're new that makes them slick, but this combo of pressures was amazing for today.
    Glad to hear it. I've found that it usually is a very good starting point using that formula. Then you can adjust up or down a psi or two or three to dial it in for the soil conditions and tread pattern/tire volume.

  17. #17
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    About 250# on Spesh 2bliss, stock rims. I run about 32 in front, 35-38 in the rear. I tried lower psi for a couple rides (about 25 front/30 rear), but I didn't like the squishy feeling running much lower than that, and I ride in lots of rocks, so I want to make sure I don't ding a rim or burp on a drop.
    '11 Specialized Enduro Expert for the trails
    '13 Felt Z4 for the road

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