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Head tube angle and finding a new stem

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Head tube angle and finding a new stem

Old 10-04-11, 09:03 PM
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Head tube angle and finding a new stem

I'm looking to get a slightly shorter stem and I'm thinking Easton EA90 or Thompson X2 (thoughts? both about the same price). The bike has a 73.5 degree head tube so if I understand this right I would need a -16.5 degree stem to get it parallel to the road. The stock stem is flipped and seems more or less flat. The EA90 only comes in a +/- 10 degree option but the X2 has a +/- 17 degree option. Maybe 7 degs is no big deal.

In any case, am I understanding the angle bit right or totally off? Thanks.
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Old 10-04-11, 09:15 PM
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+/- 17 will allow your new stem to be (almost - off by 1/2 degree in this case) parallel w the ground. The +/- 10 will be noticeably not parallel w the ground in either orientation.

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Old 10-04-11, 09:23 PM
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Well, that's what I was thinking. So if bikes tend to have HT angles in the 73 degree range, why not EA90 in 17 degree?

From Easton website:
Weighs just 130 grams in the 120mm length. 7 lengths, 0º and +/-10º rises. Available in black and white finishes.
Or is a 0 deg rise their language for "flat"?
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Old 10-04-11, 10:02 PM
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no, zero degree means it is perpendicular to the steerer.
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Old 10-04-11, 10:08 PM
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Originally Posted by unterhausen
no, zero degree means it is perpendicular to the steerer.
That's what I figured but seems odd for their high end AL stem to not be flat. It's the stem Cadel Evans uses according to the website.
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Old 10-04-11, 11:21 PM
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"Flat" stems just aren't the trend anymore. Of course, it's more important that you use whatever angle, length, and spacers needed to get your bar at the right height and extension for you, but yeah, whatever.
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Old 10-04-11, 11:34 PM
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I use -17 stems on all my bikes because of fit, and it's definitely hard to find them by high end makers. When you do, they are usually hard to find. 3T, Thomson, Ritchey, and Specialized all make good four bolt -17 stems. I wish Deda and Easton would get with the program, because I like them a lot too. I've run everyone of those brands and I like them all, but I currently use 3T stems for road and Easton stems for mountain (where I don't use a -17).
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Old 10-05-11, 07:24 AM
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Originally Posted by bikerjp
That's what I figured but seems odd for their high end AL stem to not be flat. It's the stem Cadel Evans uses according to the website.
For looks some like to match the slope of top tube, not the road.
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Old 10-05-11, 08:54 AM
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I use a 3T -17deg stem to get my bars where I want them. With a smaller frame and shorter head tube, a -6 or -10 would probably do the trick.
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Old 10-05-11, 11:46 AM
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Originally Posted by urbanknight
"Flat" stems just aren't the trend anymore. Of course, it's more important that you use whatever angle, length, and spacers needed to get your bar at the right height and extension for you, but yeah, whatever.
I want a replacement for what I have now. I flipped the stock stem and the fit is good. Now I just want a stem 10mm shorter. My stock stem looks to be a +/- 17 since it appears more flat. A 10 deg stem is going to give me height I don't want but maybe I could make it up with a spacer.
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Old 10-05-11, 12:18 PM
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Originally Posted by bikerjp
My stock stem looks to be a +/- 17 since it appears more flat. A 10 deg stem is going to give me height I don't want but maybe I could make it up with a spacer.
I would double check this, if I were you. Few bikes come stock with a +/- 17 stem. Off the top of my head, Specialized is the only company I can think of that offers anything close to this, and that is because Specialized uses a shim system to set stem angle.
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Old 10-05-11, 08:49 PM
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Originally Posted by topflightpro
I would double check this, if I were you. Few bikes come stock with a +/- 17 stem. Off the top of my head, Specialized is the only company I can think of that offers anything close to this, and that is because Specialized uses a shim system to set stem angle.
I've been googling and can't find much but did find a few pages suggesting it might be a 6-8 deg stem. Not sure if that changes based on bike size. I was just going on the way it looked but maybe a 10ish deg difference isn't that easy to see without something to compare to. Maybe the 10 EA90 will be fine.
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Old 10-05-11, 09:47 PM
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Post a pic.
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