Hollow Stainless Instead of Titanium- Mtbr.com
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  1. #1
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    Hollow Stainless Instead of Titanium

    I've thought before about hollow steel bolts. They've been used on motorcycles for a long time to save some weight from fasteners, but I never see them mentioned for bicycles.

    Tonight on ebay I happened to see some pop up that were in sizes down to M4. Here is one title currently on ebay (of course from China):

    M4 M5 M6 Stainless Hexagon socket Lamp threading Hole Bolts Allen Hollow Screws

    If titanium is about 2/3 the weight of equivelent steel, then a drilled/hollow steel bolt might be about the same weight without the worry of corrosion between Ti and aluminum.

    I don't know how a drilled steel bolt is in shear, but in tensile I'd think it's pretty similar to a non-drilled bolt.

    EDIT- Looks like "thread pass" is another key word for them.
    Have fun!

  2. #2
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    Never had an issue with seized ti bolts in aluminum components. You should always use some sort of thread compound, be it anti-seize or loctite, and this will prevent corrosion or seizure.

  3. #3
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    Ti bolts are actually 1/2 the weight of steel.
    M5 x 20mm.
    Attached Thumbnails Attached Thumbnails Hollow Stainless Instead of Titanium-img_0370_1.jpg  

    Hollow Stainless Instead of Titanium-img_0372_1.jpg  


  4. #4
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    Quote Originally Posted by Wheelspeed View Post
    I've thought before about hollow steel bolts. They've been used on motorcycles for a long time to save some weight from fasteners, but I never see them mentioned for bicycles.

    Tonight on ebay I happened to see some pop up that were in sizes down to M4. Here is one title currently on ebay (of course from China):

    M4 M5 M6 Stainless Hexagon socket Lamp threading Hole Bolts Allen Hollow Screws

    If titanium is about 2/3 the weight of equivelent steel, then a drilled/hollow steel bolt might be about the same weight without the worry of corrosion between Ti and aluminum.

    I don't know how a drilled steel bolt is in shear, but in tensile I'd think it's pretty similar to a non-drilled bolt.

    EDIT- Looks like "thread pass" is another key word for them.
    Aluminum and ss will also galvanically corrode. Use antiseize on either to help prevent.

  5. #5
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    They seem to be the same price as Ti bolts. I've got aluminum and Ti bolts (levers, top cap, bottle cage, brake rotors) on my bikes. I've never had any issues with corrosion with any of them.

  6. #6
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    Ragley Big Wig, Sunday Soundwave (BMX), 91 Schwinn High Plain (single speed "gravel" bike), Nashbar CXSS (workout)

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