Stem height?

Discuss light weight issues concerning road bikes & parts.
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TonyM
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Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Looking at the stems on my different bikes I just noticed that they have different heights.....(Pro Vibe, Deda Superleggero, Deda Zero100,...)

Is there however a “standard” height for stems?
Last edited by TonyM on Sat Apr 27, 2019 2:10 am, edited 1 time in total.

by Weenie


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wheelbuilder
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by wheelbuilder

Not sure if there is a "standard" height, but I love the look of low stack height stems. Particularly the Basso stems.

CLEAR
Posts: 176
Joined: Tue Jul 24, 2012 2:20 pm

by CLEAR

By standard, i believe its referring to 4cm normally for A head stem. But most stems i have used are ib 35mm-38mm actual stack, from ritchey, deda, 3T, mcfk, ax, etc. Basso stem stack is 25mm i believe..

mattr
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Location: The Grim North.

by mattr

TonyM wrote:
Sat Apr 27, 2019 2:10 am
Is there however a “standard” height for stems?
a standard in the bike industry? What madness is this!!!!

No. As above, anything from mid 20s to mid 40s. Probably enough to actually be an issue for fit. Two nominally identical stems could have the bars 10mm difference in height.

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wheelsONfire
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Location: NorthEU

by wheelsONfire

I think the unspoken standard is 40mm.
Bikes:

Ax Lightness Vial EVO Race (2018.12.21)
viewtopic.php?f=10&t=156137
Paduano Racing Fidia (kind of shelved)
Open *UP* (2016.04.14)


Ex bike; Vial EVO D

mattr
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Location: The Grim North.

by mattr

More likely 38. As in 1 1/2".

But still you're just as likely to find one that isn't.

ancker
Posts: 135
Joined: Sat Dec 31, 2011 9:29 pm

by ancker

When I'm cutting a steerer, I always leave room for a 5mm spacer abover the stem.
It doesn't look super clean, but it's a good fail-safe if I (or the next owner) need/want to run a different stem that's slightly taller than what it was cut for.

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Dan Gerous
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by Dan Gerous

Nothing standard which is fine but it would be nice if component companies always had this measure in their specs, some do but many don't.

biwa
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Joined: Fri Sep 21, 2018 8:39 pm

by biwa

40/41mm seem most common

mattr
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Location: The Grim North.

by mattr

Odd, just been downstairs to check (kids are in bed finally!) and of the 11 stems i have within easy reach, 7 different manufacturers (i'd guess 3 or 4 are rebranded kalloys, but different models), and no two of the same model, 9 of them are between 38 and 39 one is 44 and one is 34. (44 is a fairly hefty and cheap stem on a trail bike, 34 is a fairly crap one that i've never trusted, so it's in a box full of bars) so my "guess" of 1 1/2" doesn't seem to be far off, at least for the random selection of stems i have.

hannawald
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Location: Czech Republic

by hannawald

Deda Superzero 36mm, Deda zero 100 40mm, Mcfk 44mm (extreme), Ritchey Wcs C260 42mm, Kalloy Uno 7 40mm...
38-40mm is most common. lower or taller is not typical.

Bigger Gear
Posts: 448
Joined: Fri Mar 27, 2009 6:58 pm
Location: Wet coast, Canada

by Bigger Gear

Just a few more.

Thomson X2: 36mm
ENVE: 41mm
Thomson X4: 40mm
Moots Ti: 43.2mm despite being listed as 45mm (I've measured 2, both non-RSL)
Bontrager RXL: 41mm
Zipp Service Course SL: 41mm
Last edited by Bigger Gear on Tue Apr 30, 2019 2:17 am, edited 1 time in total.

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silvalis
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Location: Aus

by silvalis

Ritchey Logic c260 and superlogic c260 = 42mm
Zipp speed SL = 43mm
Chasse patate

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Dan Gerous
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Joined: Sun Aug 12, 2007 6:28 pm

by Dan Gerous

FSA SL-K and OS-99: 39mm
Cannondale C1 Ultralight and C2: 37mm

by Weenie


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