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  1. #1
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    I canít seem to get it up...

    Anything over 100psi just seems like it will split the Carbon rim.

    I hear of people running 120psi and that pressure worries me.

    I once exploded an Easton Havon Carbon rim on a mountain bike and I thought Ebola Gay had dropped Little Boy on my neighborhood!

    Anything more than 100 on my 25mm road tires is too much for my tastes.

    I pump them up every ride and stop at 100, what say you?

  2. #2
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    I pump my 25's to about 90psi and pinch test till they feel too soft, maybe a week or so. My 42's get around 50psi and are good for at least a month or longer till the handling is affected.

    oops, this is with aluminum rims, no carbon for me.
    Last edited by velodog; 3 Weeks Ago at 06:51 AM.
    Too old to ride plastic

  3. #3
    pmf
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    1. I don't get carbon rims
    2. Everyone on this site seems obsessed with using huge tires pumped up to 60 psi
    3. I pump my 23mm tires to around 100 psi before almost every ride (they can skate for a day)
    4. What are called 23mm tires these days were 25mm tires 20 years ago
    5. Isn't the whole point of larger tires is that you don't inflate them as much? 125 psi is pretty high pressure. What's wrong with 100 psi? Especially if you're worried about destroying an expensive rim.
    6. Are carbon rims really that fragile?

  4. #4
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    Quote Originally Posted by pmf View Post
    Are carbon rims really that fragile?
    I guess they arenít until they are.

  5. #5
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    Quote Originally Posted by factory feel View Post

    I pump them up every ride and stop at 100, what say you?

    At 100, I'm just getting started. Since you never know when your last ride will come, I alway ALWAYS drop Little Boy.

  6. #6
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    I can remember when the Specialized "Turbo" racing clincher came out. It was advertised as a 700x25, but was only 20mm wide.
    If your opinion differs from mine, ..........Too bad.
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  7. #7
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    I run 25's at 65-70F & 70-75R.... and sometimes skip checking them for the ride so they get lower.
    Really depends on your wt and what kind of roads you ride.
    I used to do a training ride that had pot holes, I filled them up to 115 for every ride, cause you never knew when you were going to hit one.
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  8. #8
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    a guy in our group consumes a lot of coffee and donuts before every ride. He drops a lot of Little Boys during the ride too. Damn

  9. #9
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    Personally, I would fill them to 130 psi and if they blow, they blow. If they blow and you have name brand carbon wheels, contact the mfr and ask for a warranty set.

    Unfortunately, we don't know just how fragile carbon wheels are because there are never any reports. No follow up.

    Dead man tell no tale...and get no tail too.

  10. #10
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    FF - I cannot imagine anyone using a Carbon wheel when a properly inflated tire = 'seems like they will split the Carbon rim'.


    Talk about killing the buzz of a nice ride on a nice bike!!!

  11. #11
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    What does the rim maker say for max PSI and tire width? What is the condition of the rims?

  12. #12
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    Carbon wheels, 25mm tires, about 70ish psi... oh and i weigh 132lbs
    "I refuse to be afraid of tomorrow, for I have seen yesterday & I love today!!"

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  13. #13
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    Quote Originally Posted by factory feel View Post
    Anything over 100psi just seems like it will split the Carbon rim.

    I hear of people running 120psi and that pressure worries me.

    I once exploded an Easton Havon Carbon rim on a mountain bike and I thought Ebola Gay had dropped Little Boy on my neighborhood!

    Anything more than 100 on my 25mm road tires is too much for my tastes.

    I pump them up every ride and stop at 100, what say you?

    What is the published maximum pressure specified by the manufacturer? Specify rim, rim size-model and manufacturer!!

    Did you splurge on Chinese rims and are now suffering from buyers remorse?

  14. #14
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    My rims are bontrager aeolus 5's and a set of 3's and another set of Boyds.

    I am asking this in a general way.

    Ever since my easton carbon tried to kill me at 40psi I've been leary.


    Is it worth being right if you end up dead right?

  15. #15
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    Quote Originally Posted by 11spd View Post
    Personally, I would fill them to 130 psi.
    at the op's weight, i'd go 140-150.
    Yossarian: don't worry. nothing's going to happen to you that won't happen to the rest of us.

  16. #16
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    Quote Originally Posted by factory feel View Post
    My rims are bontrager aeolus 5's and a set of 3's and another set of Boyds.

    I am asking this in a general way.

    Ever since my easton carbon tried to kill me at 40psi I've been leary.


    Is it worth being right if you end up dead right?
    Oh hell, we're all gonna die, might as well die right.
    Too old to ride plastic

  17. #17
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    Two important questions:

    1) Why would you use 120PSI unless you are well over 200lbs.?

    2) Why would you buy carbon rims when there are so many excellent and even light weight alloy rims available?
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

    ďStatistics are like bikinis. What they reveal is suggestive, but what they conceal is vital.Ē -- Aaron Levenstein



  18. #18
    What the what???
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    Quote Originally Posted by Lombard View Post
    Two important questions:

    1) Why would you use 120PSI unless you are well over 200lbs.?

    2) Why would you buy carbon rims when there are so many excellent and even light weight alloy rims available?
    Iím well over 200 and 100psi is the most I use for a 25mm rear tire. Donít listen to the charts, OP, trust yourself. Find the sweet spot between a rock hard ride and pinch flats.


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  19. #19
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    Carbon rims are for girly men. Mine are granite.

  20. #20
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    You had me at Ebola Gay.
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  21. #21
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    Quote Originally Posted by Opus51569 View Post
    Iím well over 200 and 100psi is the most I use for a 25mm rear tire. Donít listen to the charts, OP, trust yourself. Find the sweet spot between a rock hard ride and pinch flats.
    And there you have it. My guess is Factory Feel is just trolling again anyway.
    "With bicycles in particular, you need to separate between what's merely true and what's important."-- DCGriz, RBR.

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  22. #22
    pmf
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    Quote Originally Posted by Lombard View Post
    2) Why would you buy carbon rims when there are so many excellent and even light weight alloy rims available?
    Because they look cool. That's the only reason I can think of.

  23. #23
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    Quote Originally Posted by duriel View Post
    I run 25's at 65-70F & 70-75R.... and sometimes skip checking them for the ride so they get lower.
    That's funny. My tubes (Michelin A1, 70 gm) lose about 2 psi per day. Can you actually see that on your gauge let alone feel that it makes any difference at all in the ride? Doubtful.

  24. #24
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    Quote Originally Posted by factory feel View Post
    My rims are bontrager aeolus 5's and a set of 3's and another set of Boyds.

    I am asking this in a general way.

    Ever since my easton carbon tried to kill me at 40psi I've been leary.


    Is it worth being right if you end up dead right?

    Were you tubeless? If so, most manufacturers don't recommend going over 40 psi when running tubeless.
    You can't fix stupid.

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    I kind of wish it were legal to staple people in the face.

  25. #25
    tlg
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    Quote Originally Posted by frdfandc View Post
    Were you tubeless? If so, most manufacturers don't recommend going over 40 psi when running tubeless.
    Most? 40psi max? Where do you get that from. Never heard of such a thing.
    Custom Di2 & Garmin/GoPro mounts 2013 SuperSix EVO Hi-MOD Team * 2004 Klein Aura V

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