Well, Swan is clear in what I quoted. and in the rest of his post. http://search.bikelist.org/getmsg.asp?Filename=classicrendezvous.10809.1051.eml that the non-concentricities are there, and are best ignored because they are hard to correct. He earlier claims that the job of the wheelbuilder is to build a tensioned wheel which well recreate the shape of the untensioned one.
I know, PJW, that you have been building wheels for many years. Have you tried, say with Sun rims, to identify these flat spots and hops before the building begins? I know you've posted about them at your webpage? Again, I'm asking whether you have tried to identify and quantify the out-of-roundnesses ahead of time. Harry Travis Washington, DC On Sep 30, 11:17 pm, Peter Jon White <[EMAIL PROTECTED]> wrote: > If the out of roundness in a rim is small enough to have no effect on > the performance of the wheel, yes, you should ignore them and get the > spoke tension as even as possible. But you can be faced with a > difficult choice when the rim isn't quite round. If you're using an > inexpensive rim because you're just riding the bike a few miles back > and forth to work, you would be silly to start all over when you find > that the rim isn't perfect. You rarely find these flaws before you've > spent a lot of time lacing and tensioning the wheel, so do you want to > start all over with another rim which may be no better than the first? > > On the other hand, if you're building wheels for PBP, your standards > need to be quite a bit higher. > > On Sep 30, 9:23 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > wrote: > > > Jamie Swan offered this opinion to a first-time amateur wheel builder > > over at Classic Rendezvous (bikelist.org). He has trued over 400,000 > > wheels. > > > _____________________________ > > > The big issue is: are those hops and/or flat spots the true shape of > > the rim or did you put them there as you applied tension to the > > spokes? If those minor eccemtricites are the actual shape of the rim > > then you shouldn't try to change them. You should just support them > > with uniform spoke tension. > > > Jamie Swan > > Centerport Cycles Inc. > > Northport, New York, USA > > ___________________________________ > > > Any opinion here from other wheelbuilders? Is it feasible for amateurs > > to mark non-concentricities in rims against a perfectly drawn circle, > > and so not make mistakes in trying to correct them? Or are they too > > subtle to see? > > > Harry Travis > > Washington, DC USA --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Bicycle Lifestyle" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/bicyclelifestyle?hl=en -~----------~----~----~----~------~----~------~--~---
