Bike Forums > Stem Angle Match problem
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 Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

 01-12-06, 05:17 PM #1 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Stem Angle Match problem I have a 120mm stem at 0 degree with riser bars. The rise is 45 mm. What angle stem would I need to get to achieve the same bar height with flat bars? The stem can also be a bit longer up to 130mm. Thanks!
 01-12-06, 05:21 PM #2 genericbikedude 如果你能讀了這個你講中文     Join Date: Feb 2005 Location: New York Bikes: Posts: 3,542 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) First, this is basic trigonometry. You need the pytagorean theorum and the sine/cosine/tangent formulas. Wikipedia will help you. Second, and not to snark, why not just use flat bars?
01-12-06, 05:23 PM   #3
46x17
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 Originally Posted by genericbikedude Second, and not to snark, why not just use flat bars?
Because the current height is very comfy. So to keep comfy height I will need a different stem.

Thanks for the tip.

 01-12-06, 05:27 PM #4 genericbikedude 如果你能讀了這個你講中文     Join Date: Feb 2005 Location: New York Bikes: Posts: 3,542 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) oh, I get it. i thought you were trying to go from flats to a riser/deep drop combo. that would be stupid.
 01-12-06, 05:30 PM #5 harryhood Senior Member   Join Date: Feb 2004 Location: San Francisco, CA Bikes: Posts: 452 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) this was posted before somewhere, but couldn't find the exact post. does this help?
 01-12-06, 05:39 PM #6 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) I figured it out. I need approx. an additional 20 deg rise.
 01-12-06, 05:40 PM #7 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Thanks for all your help!
01-12-06, 05:42 PM   #8
harryhood
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Quote:
 Originally Posted by 46x17 I figured it out. I need approx. an additional 20 deg rise.
with a 130mm extension??? that's what i'm getting after studying that chart.

 01-12-06, 05:55 PM #9 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Yes. The chart rules btw!
 01-12-06, 06:03 PM #10 baxtefer Cornucopia of Awesomeness     Join Date: Oct 2004 Location: not where i used to be Bikes: Posts: 4,847 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) not to pick nits, but the "stack height" of your new stem is going to affect rise as well.
 01-12-06, 06:11 PM #11 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) What is stack height? You talking about spacer or the stem steertube clamp part? Regardless, if i ever go flat I will use the same model stem (with different angle) and no spacers anyway. I just put on some flat bars and flipped the current stem. To simulate a potential new setup. Made over the bar skids suck. So risers are staying until I get over the poser tricks.
 01-12-06, 06:12 PM #12 baxtefer Cornucopia of Awesomeness     Join Date: Oct 2004 Location: not where i used to be Bikes: Posts: 4,847 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) stem steertube clamp bit. some are longer than others. shouldn't matter thaaaaaat much though.
01-12-06, 06:15 PM   #13
46x17
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 Originally Posted by baxtefer stem steertube clamp bit. some are longer than others.
That is true.

 01-12-06, 06:26 PM #14 BlastRadius Direct Hit Not Required     Join Date: Nov 2003 Location: San Bruno, CA Bikes: Leopard DC1, Ridley X-Fire, GT Zaskar 9r Posts: 6,193 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 1 Post(s) Is this new flat bar for your bike?
 01-12-06, 06:32 PM #15 BostonFixed Banned.   Join Date: Oct 2004 Bikes: Posts: 4,416 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) Quill stems rock.
01-12-06, 06:40 PM   #16
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 Originally Posted by BostonFixed Quill stems rock.
no they dont.

01-12-06, 07:10 PM   #17
46x17
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 Originally Posted by BlastRadius Is this new flat bar for your bike?
I desired one for about an hour today for my bike.

Then I managed to try one out (friends bar) and decided that my risers are staying.

 01-12-06, 07:10 PM #18 redcurrycelt mortar and f***ing pestle     Join Date: Dec 2005 Location: sf, ca Bikes: Posts: 215 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) "Quill stems rock" I'm starting to feel that way too.. I dig the look of forged quill stems more than the big blobby funky threadless ones, for sure, especially with 1-1/8" steerers.. Obviously the connection is not as solid with quills (nor as stiff, probably), but there are certainly some functional and aesthetic pluses.
 01-12-06, 07:17 PM #19 46x17 dances with bicycle Thread Starter     Join Date: Jul 2004 Location: SF Bikes: Posts: 1,683 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) salsa makes/made some very nice threadless stems. They are tigged steel and don't have that ugly fatness that other stems have. I also really like the look of the Thomson Elite stems although those are very beefy.
 01-12-06, 07:55 PM #20 mrRed we're here, we steer!!     Join Date: Aug 2005 Bikes: Posts: 1,412 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) I love the look of quill stems, but apparently threadless is really the way to go from a mechanical standpoint.
 01-12-06, 08:27 PM #21 Judah Slower than you     Join Date: Nov 2004 Location: SF, CA Bikes: IRO Mark V & Don Walker Custom Posts: 1,800 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) You back in the city clayton? I'm pissed, it was so nice out and I wanted to ride today but I'm all sick...
01-13-06, 08:29 AM   #22
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Quote:
 Originally Posted by 46x17 my risers are staying.
On-One Mary bar right? How you liking them so far? I have been thinking about them myself for a change. Any pics?

 01-13-06, 08:56 AM #23 shants roll'em high     Join Date: Feb 2005 Location: columbus, ohio Bikes: Posts: 2,391 Mentioned: 0 Post(s) Tagged: 0 Thread(s) Quoted: 0 Post(s) **** threadless.
01-13-06, 09:03 AM   #24
genericbikedude

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 Originally Posted by shants **** threadless.
**** your dumbass 34mm flat wrench

01-13-06, 09:11 AM   #25
absntr
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Quote:
 Originally Posted by 46x17 salsa makes/made some very nice threadless stems. They are tigged steel and don't have that ugly fatness that other stems have. I also really like the look of the Thomson Elite stems although those are very beefy.
Salsa does indeed. Super stiff, sleek to match a thinner tube look.