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  1. #1
    Senior Member miamijim's Avatar
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    RIVNUTS Alu Steel SS smooth Serrated?

    I have 2 aluminum frames with loose rivnuts that need replacing.

    Which will give best long term grip and strength? I'm thinking serrated SS but I'd like to hear what you guys think.

    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  2. #2
    Andrew R Stewart Andrew R Stewart's Avatar
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    There are different diameter RivNuts in use on bikes. So whatever material make sure you have the correct fitting ones. I have augmented the fitting with epoxy a number of times. I would practice (on sheet or tubing with the same wall thickness as the bike has) before doing the actual replacement. Get a handful of each material and see which gives you (using the tool you will be using) the best fit and tightness. They aren't very expensive compared to what they do. If all else is equal I'd prefer SS as the material but I suspect you'll find a difference in the tightening between SS and Al. Andy.

  3. #3
    Senior Member miamijim's Avatar
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    Quote Originally Posted by Andrew R Stewart View Post
    There are different diameter RivNuts in use on bikes. So whatever material make sure you have the correct fitting ones. I have augmented the fitting with epoxy a number of times. I would practice (on sheet or tubing with the same wall thickness as the bike has) before doing the actual replacement. Get a handful of each material and see which gives you (using the tool you will be using) the best fit and tightness. They aren't very expensive compared to what they do. If all else is equal I'd prefer SS as the material but I suspect you'll find a difference in the tightening between SS and Al. Andy.
    Thanks. So are you saying there're different diameters for a given thread size? M5 X 0.8 are available in different O.D's?
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  4. #4
    coprolite fietsbob's Avatar
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    I have 2 aluminum frames with loose rivnuts that need replacing.

    If they are already in place, perhaps you just need to force them to expand More?

  5. #5
    Senior Member miamijim's Avatar
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    Quote Originally Posted by fietsbob View Post
    If they are already in place, perhaps you just need to force them to expand More?
    That will depend on if they'll drop out through the BB for removal!!! If they wont then I'll just re-expand them...
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  6. #6
    Randomhead
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    vent holes in the bb are probably pretty small, so you're unlikely to have success getting them out that way

  7. #7
    Senior Member miamijim's Avatar
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    Quote Originally Posted by unterhausen View Post
    vent holes in the bb are probably pretty small, so you're unlikely to have success getting them out that way
    One frame is welded the other is bonded... maybe i'll get lucky with the bonded frame
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  8. #8
    Andrew R Stewart Andrew R Stewart's Avatar
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    Quote Originally Posted by miamijim View Post
    Thanks. So are you saying there're different diameters for a given thread size? M5 X 0.8 are available in different O.D's?
    Yes. Andy.

  9. #9
    coprolite fietsbob's Avatar
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    They are expanded, at the most basic, by putting a flat washer across the flange on the outside ,
    and a greased bolt in them

    same 5x.8 . and tightening the bolt

    others have used a QR from a Seatpost, or hub put thru a tube

    Spare axle with the cone and locknuts , perhaps ..
    and just closing the QR to Pull the Riv nut thread against the outside flange..

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