Advertise on Bikeforums.net



User Tag List

Results 1 to 16 of 16
  1. #1
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)

    Straight 15 gauge spokes?

    Hi All, My back-up touring bike's wheelset is laced with this spoke size and is OEM. As this doesn't seem a more popular choice/option my question is why not?

    TIA,
    Brad

  2. #2
    Senior Member
    Join Date
    May 2006
    Location
    San Diego
    My Bikes
    IF steel deluxe 29er tourer
    Posts
    1,432
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    As you might expect, 15 ga is less popular because 14 ga is readily available. A thicker spoke will be a stronger spoke, and the weight penalty, within the context of unsupported touring, ultra light or not, is not meaningful.

  3. #3
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    3,394
    Mentioned
    50 Post(s)
    Tagged
    0 Thread(s)
    Still occasionally riding my 36 spoke wheel pair , I built on the 70s with 15ga straight spokes ..

    they're sorta light road wheels , though .. brass in spoke nipples is thicker because the threaded hole is smaller .


    ... seems if the pragmatic 14 straight is not used , people build with Butted Spokes

    often 15 in the center . 14 on the ends.

    touring, worrying about spoke weight is an odd thing , Butting does have a physical benefit

    of taking some flexing stress off the ends , and absorbing it in the running length of the spoke.

    not worrying about weight , I built relyable touring wheels with 14 ga spokes.. 88 of them in the set ..40/48.

  4. #4
    Senior Member
    Join Date
    Sep 2008
    Posts
    4,306
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bradtx View Post
    Hi All, My back-up touring bike's wheelset is laced with this spoke size and is OEM. As this doesn't seem a more popular choice/option my question is why not?

    TIA,
    Brad
    Provide a generous margin for error with the bigger spoke. Cutting costs a bit with the thinner spoke. When I was young and 60lbs lighter all my wheels were straight 15g 36 spoke wheels, racing or touring with rim weight and tire size making the difference. Never broke a spoke but did damage wheels in use. At that time I saw folks who are now my size and came to the conclusion 15g just didn't provide enough meat on the drive side of the rear wheel.

    Shaving ounces in spokes for touring application is really misguided.

  5. #5
    Senior Member
    Join Date
    Jan 2010
    Location
    Eugene, Oregon
    Posts
    5,012
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by the Bicycle Wheel, 3rd edition pp46-7 by Jobst Brandt
    ...most fatigue failures occur at these places (elbows and threads of straight-gauged spokes)...[T]he most valuable contribution of swaging is that peak stresses are absorbed in the straight midsection rather than concentrated in the threads and elbow, thereby substantially reducing fatigue failures.
    In short, there are fewer spoke failures by using swaged 14/15 gauge (1.8/2.0 mm) spokes than when straight 15 gauge or 14 gauge are used.

  6. #6
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the replies.

    My guess was that since most hubs accept a 2.0 mm spoke head, the 1.8 would be 'loose' and it just isn't an ideal match.

    Because this is the first bike I've owned with the 15 gauge spokes I was curious as to why this size isn't used more often. There is no accounting if or how many may spokes have been replaced before it came to me, but this high mileage tourer is still equipped with them. With rust blush on the fork's low rider points it's possibly been loaded to a medium weight or more.

    Thanks again for the responses!

    Brad

  7. #7
    __________ seeker333's Avatar
    Join Date
    Feb 2004
    Posts
    2,703
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bradtx View Post
    ...My guess was that since most hubs accept a 2.0 mm spoke head, the 1.8 would be 'loose' and it just isn't an ideal match...
    If it bothers you a lot, spoke washers are inexpensive (link per Mr Brown):

    Brass Flat Washer, #2 Hole Size, 0.0890" ID, 0.0280" Nominal Thickness (Pack of 100) | AmazonSupply.com

    However, I think I'd go ahead and respoke for the same amount of labor, using WS DB14:

    Wheelsmith 2.0/1.7 x 260mm Silver Spokes. Bag of 50. @ eBikeStop.com

    Note that WS SG spokes (DT too) are less expensive than DB at 60% of the cost (SG are option for those mostly ignoring previous discussion and simply want least expensive spokes from a reputable supplier):

    Wheelsmith 2.0 x 262mm Silver Spokes. Bag of 50. @ eBikeStop.com

  8. #8
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    3,394
    Mentioned
    50 Post(s)
    Tagged
    0 Thread(s)
    My guess was that since most hubs accept a 2.0 mm spoke head, the 1.8 would be 'loose'
    not when there is any tension on them, in a built wheel,

    the spoke nipple tightening of course pulls the J hook against the edge of the hole in the Alloy hubflange.

    spoke thread is rolled in, so its bigger than 2.0mm anyhow.

  9. #9
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by seeker333 View Post
    If it bothers you a lot, spoke washers are inexpensive (link per Mr Brown)...
    The bike doesn't have spoke washers and the spoke's gauge isn't a concern, rather just a curiosity. I also have to make a correction, it seems that Cannondale used 15 gauge spokes on many models in '96 and I owned a roadie, bought new, that was so equipped. Those wheels are still doing well on my daughter"s bike.

    Brad

  10. #10
    Senior Member Doug64's Avatar
    Join Date
    Mar 2009
    Location
    Oregon
    Posts
    2,682
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bradtx View Post
    The bike doesn't have spoke washers and the spoke's gauge isn't a concern, rather just a curiosity. I also have to make a correction, it seems that Cannondale used 15 gauge spokes on many models in '96 and I owned a roadie, bought new, that was so equipped. Those wheels are still doing well on my daughter"s bike.

    Brad
    Another curiosity: Cannondale used titanium spoke nipples in that era of wheels. Seems like the wheels were built to be a good balance of weight and strength.

  11. #11
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Doug64 View Post
    Another curiosity: Cannondale used titanium spoke nipples in that era of wheels. Seems like the wheels were built to be a good balance of weight and strength.
    I didn't know that, thanks.

    Brad

  12. #12
    Senior Member Doug64's Avatar
    Join Date
    Mar 2009
    Location
    Oregon
    Posts
    2,682
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by bradtx View Post
    I didn't know that, thanks.

    Brad
    Access to Bikepedia can make anyone sound knowledgeable 1996 Cannondale T700 - BikePedia
    Last edited by Doug64; 03-17-14 at 12:06 AM.

  13. #13
    Senior Member
    Join Date
    Dec 2010
    Location
    Above ground, Walnut Creek, Ca
    My Bikes
    7 single speed road
    Posts
    4,440
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    don't know if anybody mentioned it, but be aware that spoke nipples for 15ga and 14ga spokes are NOT interchangeable. so if you plan to carry spares make sure you have the right size...

  14. #14
    Senior Member
    Join Date
    Jul 2011
    Posts
    1,559
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    One option is to use 15s on the rear wheel on the non-drive side. It is supposed to make a more durable wheel.

    "In short, there are fewer spoke failures by using swaged 14/15 gauge (1.8/2.0 mm) spokes than when straight 15 gauge or 14 gauge are used."

    It is hard to have fewer failures than zero. Spoke superiorities are largely folkloric when the wheels are properly built using quality components that are a good fit to each other.

  15. #15
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by hueyhoolihan View Post
    don't know if anybody mentioned it, but be aware that spoke nipples for 15ga and 14ga spokes are NOT interchangeable. so if you plan to carry spares make sure you have the right size...
    Quote Originally Posted by MassiveD View Post
    One option is to use 15s on the rear wheel on the non-drive side. It is supposed to make a more durable wheel.



    "In short, there are fewer spoke failures by using swaged 14/15 gauge (1.8/2.0 mm) spokes than when straight 15 gauge or 14 gauge are used."

    It is hard to have fewer failures than zero. Spoke superiorities are largely folkloric when the wheels are properly built using quality components that are a good fit to each other.
    I learned both of these points when I researched 15 gauge spokes before posting.

    Brad

  16. #16
    Senior Member
    Join Date
    Jun 2010
    Location
    Pearland, Texas
    My Bikes
    Cannondale, Trek, Raleigh, Santana
    Posts
    5,727
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Doug64 View Post
    Access to Bikepedia can make anyone sound knowledgeable 1996 Cannondale T700 - BikePedia
    Mine appear to be the standard brass, but the rims are Sun L18s rather than the catalog spec., which is sometimes different from production.

    Brad

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •