Ikon 2.35 - Stretched overnight and Now Feels Harsh- Mtbr.com
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  1. #1
    Salt Lake City, UT
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    Ikon 2.35 - Stretched overnight and Now Feels Harsh

    I'm running Ikon 29x2.35 front and rear.

    A friend told me about inflating tires to (for example) 50psi, letting them sit for 24 hours to stretch.

    It worked. I was dead-on at a 2.35 according to my caliper and after (not even) 24 hours, they both were 2.41.

    But. Today I rode and they suddenly felt like they were filled with concrete. Incredibly rigid.

    I run 21psi front / 25psi rear (tubeless).

    I rode nearly 5 times last week in some of the roughest terrain possible (southern Utah), but today I IMMEDIATELY noticed something felt wrong as soon as I started bombing back down.

    Could I have over-stretched the casing somehow, ruining the integrity....? It doesn't make sense, but the rigidity was instantly noticeable in the rocks. (I'm well aware that they Ikon is a fairly rigid tire to begin with, but I ran them nearly all last year as well (a different set), not to mention this is what I was running all of last week).

  2. #2
    Ahhh the pain....
    Reputation: Raybum's Avatar
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    I don't think the stretching could cause a tire to feel more rigid...A few things to check... is your pressure gage correct? if you're using the one on the pump, it could be off up to 3 or 4 psi. Secondly, 21 psi on front is kinda high unless you're 175lbs. I run that tire at 18-19 psi on front (I'm about 170 geared up).

  3. #3
    Hitching a ride
    Reputation: Schulze's Avatar
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    Increased diameter at the same pressure = increased tension. It is directly proportional and linear.

    So let some air out.

  4. #4
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    You have more volume so drop a couple psi.

  5. #5
    Salt Lake City, UT
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    Quote Originally Posted by Schulze View Post
    Increased diameter at the same pressure = increased tension. It is directly proportional and linear.

    So let some air out.
    I get that. But going from a 2.35 to a 2.4 didnít seem like grounds for a drastic change. Iíll drop my pressures even more and see.

    I did drop them yesterday while on the trail and the difference was minimal. But without a gauge.


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  6. #6
    transmitter~receiver
    Reputation: meltingfeather's Avatar
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    If they're tubeless be careful about blowing beads off at pressure that high.
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

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