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switching out the stem?

Old 01-28-11, 12:00 AM
  #1  
jnfr
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switching out the stem?

Hi! I'm considering switching out my bike's threadless stem, a FSA OS-190. Google says it's got a stem angle of 84 96 degrees. Now, I don't understand...how can the stem have two angles!?

While I'm at it : What are common angles/measurements of stems considered desireable for touring/commuting?

Thanks! I'm somewhat new to the bike world, but I'm quite avid!
 
Old 01-28-11, 12:20 AM
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It's 6 degrees from perpendicular (90) and can be flipped either up (90 + 6 = 96) or down (90 - 6 = 84). The 6 degree stem seems to be the most common angle for commuting, but I am sure you can get higher angle stems.

Why do you want to switch it?
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Old 01-28-11, 09:25 AM
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My take on stems for touring is that you should try and set up your bike for all-day comfort. The stem can raise or lower your bars, and it can also extend or shorten your reach to the bars (from the saddle.) I like the top of my bars level with or only slightly lower than the top of my saddle. I've found this lessens hand soreness/numbness. I have my seatpost pulled out quite a ways for my long legs, so I like a stem with some rise to it, to match. I can't tell you what gauge I use to determine how far I like the reach from the saddle to the bars. I just ride and play with it until I find a setup that feels right. You can do this by sliding the saddle forwards or backwards, and if you can't get it right you can also try a different stem with less or more reach.

The reach on my LHT seems rather long, so I have a stem with lots of rise and not much reach.

I bought a few stems (Ebay helped) before I found the one that seemed right. I kept them and they were usefull in setting up my next bike. I'll probably keep them, in case I or one of my family gets a new bike in the future. It's nice to have a few different models to try when you're setting things up. Even if you don't settle on one, they can help steer you to a purchase that will work.
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Old 01-28-11, 04:54 PM
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aah! I see! Thanks for explaining the two numbers, caloso!
 
Old 01-28-11, 05:05 PM
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Originally Posted by jnfr
aah! I see! Thanks for explaining the two numbers, caloso!
The confusing thing for me is when you start to consider that the headtube is not straight up and down; typically, it's at 15-17 degrees from vertical. So, you may see stems labeled as 17 or 73 degrees. When installed, they allow you to have a stem that's more or less parallel to the ground.
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