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Road bike stem needed

Old 11-27-20, 10:47 AM
  #1  
bonsai171
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Road bike stem needed

Anyone know where to find a 12 degree stem? Got a 12 degree stem now, and that gives me a stem that is parallel to the ground. I need one that is about 100mm long. It has been a few years since I build my road bike, and the 110mm stem is just too long and not comfortable anymore.

Here's what i've found so far:
Specialized s-works SL stem $125
Zipp SL sprint carbon $265

Looking for a stem around 100g, and suggestions would be appreciated. These prices are pretty high to me too.

Dave
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Old 11-27-20, 10:53 AM
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Specialized Comp. Much more affordable.
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Old 11-27-20, 10:53 AM
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I have the Sprint SL and it is very stiff but pricey.
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Old 11-27-20, 10:55 AM
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If you can handle a -17, a Kalloy Uno stem runs about 25 bucks and weighs around 110 grams. I spent an extra 12 bucks or so on titanium bolts ang got mine sub 100. I had one on my climbing bike. Very nice for the price and weight.
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Old 11-27-20, 12:13 PM
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Originally Posted by rubiksoval View Post
If you can handle a -17, a Kalloy Uno stem runs about 25 bucks and weighs around 110 grams. I spent an extra 12 bucks or so on titanium bolts ang got mine sub 100. I had one on my climbing bike. Very nice for the price and weight.
I have one these on my fixed gear. I want the stem to be parallel to the ground, so -17 degrees is a no go.

Dave
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Old 11-27-20, 12:15 PM
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Originally Posted by bonsai171 View Post
Anyone know where to find a 12 degree stem? Got a 12 degree stem now, and that gives me a stem that is parallel to the ground. I need one that is about 100mm long. It has been a few years since I build my road bike, and the 110mm stem is just too long and not comfortable anymore.

Here's what i've found so far:
Specialized s-works SL stem $125
Zipp SL sprint carbon $265

Looking for a stem around 100g, and suggestions would be appreciated. These prices are pretty high to me too.

Dave
- 10mm is not going to make much difference.

- you don't need to spend this much money on a good stem.

-saving grams of weight will not do anything. You can shave your pubes to account for something if you really wanted to.
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Old 11-27-20, 12:25 PM
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I always thought that -17 degree stems are parallel to the ground. I have several bikes with -17 degree stems.
(Maybe I need to measure it...visually they look parallel)
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Old 11-27-20, 12:35 PM
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Originally Posted by Andrey View Post
I always thought that -17 degree stems are parallel to the ground. I have several bikes with -17 degree stems.
(Maybe I need to measure it...visually they look parallel)
Head tube angle changes a lot on some bike models as you go from the smaller sizes to the larger sizes. Also the specific genre of road bike (or any bike) and the trends of the time period it was manufactured give differing head tube angles.
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Old 11-27-20, 12:36 PM
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Originally Posted by Iride01 View Post
Head tube angle changes a lot on some bike models as you go from the smaller sizes to the larger sizes. Also the specific genre of road bike (or any bike) and the trends of the period it was made in give differing head tube angles.
Thanks. I did not know that. I always used this tool to measure:
Stem Comparison Tool | yojimg.net
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Old 11-27-20, 01:59 PM
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A -12 stem gives you a level stem? So your HTA is 78 degrees?

This costs $50 across the internet. 12deg and 100mm
https://www.jensonusa.com/Specialized-Comp-Multi-Stem
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Old 11-27-20, 02:42 PM
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You do need a -17 stem to be parallel to the ground. A -12 would raise the bars by 8-9mm. I've got a -17 x 100mm zipp SL on eBay for $65 delivered, like new.
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Old 11-27-20, 03:12 PM
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Originally Posted by bonsai171 View Post
Anyone know where to find a 12 degree stem? Got a 12 degree stem now, and that gives me a stem that is parallel to the ground. I need one that is about 100mm long. It has been a few years since I build my road bike, and the 110mm stem is just too long and not comfortable anymore.

Here's what i've found so far:
Specialized s-works SL stem $125
Zipp SL sprint carbon $265

Looking for a stem around 100g, and suggestions would be appreciated. These prices are pretty high to me too.

Dave
Good luck finding a 100mm stem that weighs 100g, especially at a reasonable price.


Originally Posted by Andrey View Post
I always thought that -17 degree stems are parallel to the ground. I have several bikes with -17 degree stems.
(Maybe I need to measure it...visually they look parallel)
A -17 degree stem will be parallel to the ground if the bike's headtube angle is 73 degrees. (17 + 73 = 90)
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Old 11-27-20, 04:06 PM
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Originally Posted by Koyote View Post

A -17 degree stem will be parallel to the ground if the bike's headtube angle is 73 degrees. (17 + 73 = 90)
It sounds like the OP is trying to match the stem to a slightly sloping TT.
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Old 11-27-20, 05:04 PM
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Here is the front end with a -12 degree slope. It's pretty close to level with the ground.

Dave
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Old 11-27-20, 05:18 PM
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Originally Posted by bonsai171 View Post
Here is the front end with a -12 degree slope. It's pretty close to level with the ground.

Dave
It is pretty close, only 5 degrees off (17-12=5).
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Old 11-27-20, 05:31 PM
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Originally Posted by xseal View Post
It is pretty close, only 5 degrees off (17-12=5).
I know where everyone is coming from on this 17 degree stem, but I put one on the bike tonight and it was even lower than the picture above, and definitely not level with the ground.

Dave
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Old 11-27-20, 05:51 PM
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Not trying to give you a hard time, but its a matter of simple math, 90-HT angle = stem to get horizontal. Perhaps the lower portion of your stem is angled from the actual centerline of the stem which makes it look likes not level.
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Old 11-27-20, 06:21 PM
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Originally Posted by bonsai171 View Post
Here is the front end with a -12 degree slope. It's pretty close to level with the ground.

Dave
It's not level, but it's close to the slope of your TT.
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Old 11-27-20, 06:28 PM
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Originally Posted by noodle soup View Post
It's not level, but it's close to the slope of your TT.
Yeah, as I said before, the 12 degree is pretty close. If I can find another stem that is 12 degrees and just a little bit shorter, that should do the trick.

Dave
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Old 11-28-20, 12:19 AM
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Originally Posted by bonsai171 View Post
I know where everyone is coming from on this 17 degree stem, but I put one on the bike tonight and it was even lower than the picture above, and definitely not level with the ground.

Dave
It'll be lower since its 5 degrees less. And it'll be closer to level with the ground since your bike probably has a head tube angle between 72.5 and 73.5 degrees.

Regardless, good luck on the search. If you get a 17 degree stem and just set it higher with a couple millimeter spacers, itll be the same effective height as you have now, and you will have access to more stem options.
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Old 11-28-20, 09:11 AM
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Ok, here you go. Not likely though at 100g weight:

https://www.bike24.com/search?searchTerm=12+degree+stem
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Old 11-28-20, 08:55 PM
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Originally Posted by Sy Reene View Post
Ok, here you go. Not likely though at 100g weight:

https://www.bike24.com/search?searchTerm=12+degree+stem
I just don't think there are 100mm stems that light...At least, I've not seen one.

A couple years ago, I built up a bike and used a high-end Zipp stem (100mm) which came with ti bolts. I think the claimed weight was 125 grams.
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Old 11-29-20, 10:49 AM
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After seeing the big spacer stack, I'd get a -6 and get rid of 10mm of spacer.
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Old 11-29-20, 12:14 PM
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Originally Posted by DaveSSS View Post
After seeing the big spacer stack, I'd get a -6 and get rid of 10mm of spacer.
Or you could flip existing stem, toss a bunch of spacers and the reach would also be reduced. Zero cost, tighter front end and safer.
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Old 11-29-20, 02:18 PM
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Originally Posted by Atlas Shrugged View Post
Or you could flip existing stem, toss a bunch of spacers and the reach would also be reduced. Zero cost, tighter front end and safer.
I like the last two posts.
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