Learning about frame geometry
Not sure if this is the right place to post this but I figured you guys would be the most likely to know. Are there any good sources that describe the various angles and lengths of a frame and how each affects the handling of the bike. I know the basics like a longer wheel base is more stable. Is there a good source that puts everything together? I've found a lot of random bits of information on the web but nothing that's really comprehensive.
Along the same lines, is there any book or website or anything that describes the differences in geometry of various bikes, like road vs. cyclocross vs. track vs. etc. |
I'd start by looking at the geometries of bikes on various manufacturer's web sites. Surly, for example, lists the geometries of all of their bikes. Sheldon Brown has scanned old Bridgestone catalogs where you can see what Grant Peterson was up to with road, mountain, and hybrid geometries. Then think about the bike or bikes that you own, and maybe try to ride some with different geometries. It will all start coming together, but it's a huge and contentious subject and there is no one place to find the right answer. Beware of anyone claiming to know anything about the subject, and let the existing bikes and numbers speak for themselves.
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It`s a pretty murky subject for me, too. Feel free to shoot me down, but I think an awful lot of it is guesses until the specific combination you`re considering has actually been built and tested. Aside from manufacturers` websites and catalogues, here`s a big collection of geometry data:
http://hiddenfortress.org/geometry/index.html |
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Thanks Cassave. He's got a lot of good stuff. I guess it's true what jimn said... there's info spread all over the place and no clean way to put it all together. Hopefully within the next few years I'll build/ride more bikes of varying geometry to figure out my own sweet spot.
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My best learning experience in this area was building a few bikes. Especially the bad ones - nothing will remind you of what a too-low bottom bracket or too-shallow seat tube angle means like riding it every day for months.
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Originally Posted by rodar y rodar
(Post 13541715)
It`s a pretty murky subject for me, too. Feel free to shoot me down, but I think an awful lot of it is guesses until the specific combination you`re considering has actually been built and tested. Aside from manufacturers` websites and catalogues, here`s a big collection of geometry data:
http://hiddenfortress.org/geometry/index.html Some good configurations are known and have been proven in the marketplace, as well as on the open road. |
What really helped me learn this stuff in the begining was a book at barnes and noble called a Lugged frame construction a manual for the first time builder by Mark Chimonas, it goes pretty in depth as to how each tube and angle effects the characteristics as well as how to actually find all those numbers
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Well, there's one christmas present for myself. I've been considering buying the Paterek Manual since I've heard good things. Does it describe geometry at all?
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