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-   -   Ask Scrod (https://www.bikeforums.net/singlespeed-fixed-gear/769181-ask-scrod.html)

TylerMatthews 06-19-12 09:57 AM


Originally Posted by Scrodzilla (Post 14376731)
I missed tha part of your post regarding drop.

Ok, cool.

TylerMatthews 06-19-12 10:01 AM


Originally Posted by yummygooey (Post 14376732)
Why don't you just take some spacers out from under your stem?

I don't have any spacers. I'm looking for a level aesthetic as well as a bit more drop. I think I need about a 10 degree rise/drop and about a 70mm length. Hard to find so far.

yummygooey 06-19-12 10:45 AM

Oh, I see. Your pedalroom led me to believe otherwise.

Weird fit is weird.

Scrodzilla 06-19-12 10:45 AM


Originally Posted by yummygooey (Post 14377010)
Oh, I see. Your pedalroom led me to believe otherwise.

Weird fit is weird.

+1

TylerMatthews 06-19-12 10:50 AM


Originally Posted by yummygooey (Post 14377010)
Oh, I see. Your pedalroom led me to believe otherwise.

Weird fit is weird.

A few changes since then, I think the photos are probably two months old.

Just out of curiosity, are you saying a 10 degree rise/drop is uncommon without a spacer?

yummygooey 06-19-12 10:54 AM

Nope. It's just that you are looking for a chode stem with a lot of drop.

You probably want a 17 degree stem if you're looking for that "level aesthetic". A 10 degree stem in the "drop" position will still have some rise from flat.

Scrodzilla 06-19-12 10:55 AM

The Thomson X2 comes in 70mm with a +/- 10° rise. Pretty sure that's as close as you're going to get. I honestly can't see why anyone would want to use such a short stem with more drop than that.

TylerMatthews 06-19-12 10:58 AM


Originally Posted by Scrodzilla (Post 14377061)
The Thomson X2 comes in 70mm with a +/- 10° rise.

Awesome, that's perfect. I didn't come across that earlier. Thanks.

TylerMatthews 06-19-12 11:00 AM


Originally Posted by yummygooey (Post 14377056)
Nope. It's just that you are looking for a chode stem with a lot of drop.

You probably want a 17 degree stem if you're looking for that "level aesthetic". A 10 degree stem in the "drop" position will still have some rise from flat.

17 degrees is helpful. Thanks.

himespau 06-19-12 11:14 AM

Is your frame just too big?

TylerMatthews 06-19-12 11:15 AM


Originally Posted by Scrodzilla (Post 14377061)
I honestly can't see why anyone would want to use such a short stem with more drop than that.


I didn't catch your edit. When the stem is installed on the bike there really won't be much of a drop, really just looking for a level or close to level position. X2 will probably fit the bill.

TylerMatthews 06-19-12 11:18 AM


Originally Posted by himespau (Post 14377167)
Is your frame just too big?

No, but I do prefer tight geometry.

prooftheory 06-19-12 11:59 AM

Chode stem tight geometry
/notscrod

ddeadserious 06-19-12 12:02 PM


Originally Posted by prooftheory (Post 14377394)
Chode stem ≠tight geometry
/notscrod

Fixed.

prooftheory 06-19-12 12:04 PM

Thanks

TylerMatthews 06-19-12 12:59 PM


Originally Posted by prooftheory (Post 14377394)
Chode stem tight geometry
/notscrod

How would the position of the bars not affect the geometry of a bike setup?

Spoonrobot 06-19-12 01:06 PM

You're using your words wrong.

"Tight geometry" generally refers to seat tube and head tube angles greater than 73 degrees as well as shorter front end and chain stay measurements.

"Chode stems" generally refer to stems too short for effective rider placement. Generally used by riders with a less than ideal amount of knowledge about how a bike is supposed to fit. This creates issues with the handling and rider comfort during different positions. You want a frame with a proper length top-tube so you can use an appropriate length stem (80/90-120mm)

I don't think you know what you're doing with respect to fitting.

TylerMatthews 06-19-12 01:16 PM


Originally Posted by Spoonrobot (Post 14377688)
You're using your words wrong.

"Tight geometry" generally refers to seat tube and head tube angles greater than 73 degrees as well as shorter front end and chain stay measurements.

"Chode stems" generally refer to stems too short for effective rider placement. Generally used by riders with a less than ideal amount of knowledge about how a bike is supposed to fit. This creates issues with the handling and rider comfort during different positions. You want a frame with a proper length top-tube so you can use an appropriate length stem (80/90-120mm)

I don't think you know what you're doing with respect to proper fitting.

Ok, so in your culture the word geometry refers only to the frame? Here is how I see it, when you position or adjust any of the contact or pivot points the riding geometry will change. What is proper about the lengths between 90mm and 120mm, or rather what is inappropriate about a 70mm stem?

Just picked up a 90mm Thomson X4 by the way, appreciate the advice Scrod and Yummy.

Scrodzilla 06-19-12 01:27 PM

Frame geometry is frame geometry, regardless of what length stem you have or how big your britches are.

TylerMatthews 06-19-12 01:30 PM


Originally Posted by Scrodzilla (Post 14377803)
Frame geometry is frame geometry, regardless of what length stem you have or how big your britches are.

Would you not consider the saddle in relation to the handlebars, in relation to the pedals and so on geometry?

Scrodzilla 06-19-12 01:30 PM

When referring to the geometry of a bike, no - because those are all variables that can change. As myself and others have told you, "geometry" refers to angles/length of a frame's tubes. You can change the height/length of your stem until you pass out. You cannot change the length or angle of your head tube.

TylerMatthews 06-19-12 01:31 PM

That's irrelevant though, geometry can change, no?

Kayce 06-19-12 01:33 PM

What is your culture where frame geometry includes things that are not frame?

Is there some secret culture in Boston I don't know about? I have ridden in Boston many times, most riders seemed about as knowledgable as any other city. There are lots of high quality bike builders in the Boston area. So I am sure they know what they are talking about.

Maybe your culture is just you, if so keep going with that. It will make advice much easier to get.


_________________________________________________________________________________

Read the things posted, you will learn things.

Geometry- The angles and measures of your frame. The length of the seat tube, top tube, headtube, and chain stays as well as the angles of the headtube and seattube.

Fit- The combo of the geometry of the frame, along with the placement of everything added to the bike. The height, angle, and location of the saddle. The height, angle and location of the bars. And the length of crank. If you are riding clipless sometimes the location of the cleats on your shoes is also included.

Geometry can never change on a frame, you can change all sorts of things about the fit.

TylerMatthews 06-19-12 01:34 PM


Originally Posted by Kayce (Post 14377842)
What is your culture where frame geometry includes things that are not frame?

Is there some secret culture in Boston I don't know about? I have ridden in Boston many times, most riders seemed about as knowledgable as any other city. There are lots of high quality bike builders in the Boston area. So I am sure they know what they are talking about.

Maybe your culture is just you, if so keep going with that. It will make advice much easier to get.


I never mentioned frame geometry specifically, just geometry. Geometry is just the position of things and things in relation to each other. In your culture, the word geometry apparently only refers to the unchanging geometry of the frame, I wasn't aware of that. Not knocking your culture, relax.

Scrodzilla 06-19-12 01:35 PM

Then you don't know what you're talking about.


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