T
Tim McNamara
Guest
"death" <[email protected].*.no*spam> writes:
>> Basically, this is going to put you about 1.5 cm or so ahead of your "ideal" fit.
>
> Please bear with me, I obviously did not pay close enough attention in geometry class. I'm not
> sure what you mean by "ahead."
Think of the seat tube as a rotating arm, measuring the angle from the horizontal behind the bottom
bracket. The steeper the angle, the farther forward the top of the seat tube. If your ideal is 73.5,
then a 75 will put you about farther ahead of the bottom bracket.
If you haven't read:
http://www.sheldonbrown.com/frame-sizing.html and
http://www.rivendellbicycles.com/html/rr_comfposition.html
you should. There are other good sites for information about frame geometry, too. With diagrams this
becomes instantly obvious.
> http://www.somafab.com/geometry03.html
>
> The frame I am interested in is called the "Rush," the numbers are at the bottom of the page.
Yup, that's pretty much designed like a dedicated track bike. I won't dissuade you from it because,
as I mentioned, I like riding a track bike. It's fun.
>> I'm curious- why are you buying this frame rather than one that fits?
>
> Well, I am considering buying this frame because I thought it got closest to the measurements I
> was looking for while best meeting a couple of other requirements I have. These other requirements
> are somewhat simple, I would like the frame to be made of steel and I am looking for a total bike
> cost of $1,200-$1,500 which puts the frame into the Made in Taiwan range.
Consider a Rivendell Quickbeam:
http://rivendellbicycles.com/webalog/frames/50150.html
> I looked very closely at Soma, Surly, Bianchi, KHS & Fuji. The Soma and Bianchi frames have
> nearly(if not exactly) the same geometry: Bianchi Pista: (it is worth noting that SB does a better
> job providing information on the Harris Cyclery site about this bike than Bianchi does on their US
> web site).
This is par for the course. Sheldon is a smart guy and very thorough. He loves what he
does, I think.
Also consider a Kogswell (www.kogswell.com)
> I know that I could convert a road bike to fixed, but that does not really appeal to me. I like
> the aesthetic of a track bike(but I am going to use brakes). Perhaps that sounds shallow, but I
> need to be attracted to the bike if I am going to spend a lot of time with it(the first time I saw
> my reflection in the chrome of an 04 Bianchi Pista my wallet started to itch).
Not shallow at all. You do have to like the bike, to be drawn to it, in order to get out and ride
it. Shoot, that's why many of us have multiple bikes- at least one calls to us every day!
>> Basically, this is going to put you about 1.5 cm or so ahead of your "ideal" fit.
>
> Please bear with me, I obviously did not pay close enough attention in geometry class. I'm not
> sure what you mean by "ahead."
Think of the seat tube as a rotating arm, measuring the angle from the horizontal behind the bottom
bracket. The steeper the angle, the farther forward the top of the seat tube. If your ideal is 73.5,
then a 75 will put you about farther ahead of the bottom bracket.
If you haven't read:
http://www.sheldonbrown.com/frame-sizing.html and
http://www.rivendellbicycles.com/html/rr_comfposition.html
you should. There are other good sites for information about frame geometry, too. With diagrams this
becomes instantly obvious.
> http://www.somafab.com/geometry03.html
>
> The frame I am interested in is called the "Rush," the numbers are at the bottom of the page.
Yup, that's pretty much designed like a dedicated track bike. I won't dissuade you from it because,
as I mentioned, I like riding a track bike. It's fun.
>> I'm curious- why are you buying this frame rather than one that fits?
>
> Well, I am considering buying this frame because I thought it got closest to the measurements I
> was looking for while best meeting a couple of other requirements I have. These other requirements
> are somewhat simple, I would like the frame to be made of steel and I am looking for a total bike
> cost of $1,200-$1,500 which puts the frame into the Made in Taiwan range.
Consider a Rivendell Quickbeam:
http://rivendellbicycles.com/webalog/frames/50150.html
> I looked very closely at Soma, Surly, Bianchi, KHS & Fuji. The Soma and Bianchi frames have
> nearly(if not exactly) the same geometry: Bianchi Pista: (it is worth noting that SB does a better
> job providing information on the Harris Cyclery site about this bike than Bianchi does on their US
> web site).
This is par for the course. Sheldon is a smart guy and very thorough. He loves what he
does, I think.
Also consider a Kogswell (www.kogswell.com)
> I know that I could convert a road bike to fixed, but that does not really appeal to me. I like
> the aesthetic of a track bike(but I am going to use brakes). Perhaps that sounds shallow, but I
> need to be attracted to the bike if I am going to spend a lot of time with it(the first time I saw
> my reflection in the chrome of an 04 Bianchi Pista my wallet started to itch).
Not shallow at all. You do have to like the bike, to be drawn to it, in order to get out and ride
it. Shoot, that's why many of us have multiple bikes- at least one calls to us every day!