Who needs wide rims?- Mtbr.com
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  1. #1
    Nouveau Retrogrouch SuperModerator
    Reputation: shiggy's Avatar
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    Who needs wide rims?

    BFL on a HED 45(mm) rim @ ~15psi
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    If the tire needs more room, it just takes it.
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    The tire slipped off on its own after being mounted for 3-4 days. Has not moved again after more than a week.
    Measured ~86mm wide with both beads seated.
    ~110mm now
    mtbtires.com
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  2. #2
    mtbr member
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    I had a road tire that did that to me regularly on rides. File 13'd it

  3. #3
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    Now that is an offset wheel that you could feel the difference.
    Latitude 61

  4. #4
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    That sucks, anyone know if the uma 50 has the same bead stability as the 70 and 90? If so I think you should look into them/try to find a set.
    Taking a tire off uma 90's is like taking a "regular" tire off a skinny rim, actually takes a little effort. Unlike my set of rolling d's where you can shake the tire off.

  5. #5
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    I have a set of those 45mm HED rims. If yours are the same as mine, they have a bead hook but don't have any flat bead seat area like most rims do. Maybe that has something to do with it? All I've ever mounted on mine were 2.5-3" downhill tires, never tried any Surly tires.

  6. #6
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by Andy FitzGibbon View Post
    I have a set of those 45mm HED rims. If yours are the same as mine, they have a bead hook but don't have any flat bead seat area like most rims do. Maybe that has something to do with it? All I've ever mounted on mine were 2.5-3" downhill tires, never tried any Surly tires.
    There is a bead seat shelf, but the tire fit is loose. It was tough just to keep the tire on the rim to inflate.
    mtbtires.com
    The trouble with common sense is it is no longer common

  7. #7
    gran jefe
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    I actually think it looks pretty cool that way. More cartoony and balloony.

  8. #8
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by Bill in Houston View Post
    I actually think it looks pretty cool that way. More cartoony and balloony.
    that is why I posted it!

    I was surprised the tube stayed in the tire.
    mtbtires.com
    The trouble with common sense is it is no longer common

  9. #9
    gran jefe
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    Quote Originally Posted by shiggy View Post
    I was surprised the tube stayed in the tire.
    A hernia waiting to happen...

  10. #10
    is buachail foighneach me
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    Quote Originally Posted by GTR2ebike View Post
    That sucks, anyone know if the uma 50 has the same bead stability as the 70 and 90? If so I think you should look into them/try to find a set.
    Taking a tire off uma 90's is like taking a "regular" tire off a skinny rim, actually takes a little effort. Unlike my set of rolling d's where you can shake the tire off.

    Make sure you push the bead all the way to center(off the bead seat all the way around) on the 90mm rim you're trying to undress. It should come off by hand. I had a set of Uma 50's back in 2010, and I'm pretty sure they had the lip.

  11. #11
    mtbr member
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    I've studied Shiggy's Virtual Rim™ which widens a tyre by 24mm and come up with an improvement.

    Detach the bead from the other side too.

    Obviously this will require further R&D, but I suspect that instead of using talc, carborundum paste may be required to stop the tube moving relative to the tyre.

    Unfortunately I don't have any carborundum paste at the moment, so I'll have to leave one of the great advances in lightweight rim technology to one of you folk.

    Next question is how to drill lightening holes in a Virtual Rim™.

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  12. #12
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    Nice! I'm in the process of offset drilling some 50mm wide rims. I was planning either regular Larry's or Black Floyds on them. Never thought about the BFL!

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