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Stem Length

dexter

Turbo Monkey
Sep 23, 2001
3,053
99
Boise, Idaho
Okay so after ripping through this thread you guys got me having doubts on my shorty stem. I am 5'10 with a big wingspan on a Large sb130- long bike. I am running a 35mm stem on there to help keep everything nice and tight and have loved it except for a few things. What negative affects will I be experiencing from the short stem vs going to a 45mm+? Before i list out what I've experienced I want to hear it from other folks first. Current offset on the fork is 44mm
 

Cerberus75

Monkey
Feb 18, 2017
520
194
Okay so after ripping through this thread you guys got me having doubts on my shorty stem. I am 5'10 with a big wingspan on a Large sb130- long bike. I am running a 35mm stem on there to help keep everything nice and tight and have loved it except for a few things. What negative affects will I be experiencing from the short stem vs going to a 45mm+? Before i list out what I've experienced I want to hear it from other folks first. Current offset on the fork is 44mm
With a 35mm stem you're going to have to intentionally weight the front more in turns. And risk the rear not having enough weight. Seated riding will feel twitchy.
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,599
6,788
borcester rhymes
Okay so after ripping through this thread you guys got me having doubts on my shorty stem. I am 5'10 with a big wingspan on a Large sb130- long bike. I am running a 35mm stem on there to help keep everything nice and tight and have loved it except for a few things. What negative affects will I be experiencing from the short stem vs going to a 45mm+? Before i list out what I've experienced I want to hear it from other folks first. Current offset on the fork is 44mm
35: more stable in straights as speed, more body english needed to turn
45/50: more nimbly/bimbly, more "playful" feeling.
 

dovbush66

Monkey
Aug 27, 2018
195
218
Ireland
35: more stable in straights as speed, more body english needed to turn
45/50: more nimbly/bimbly, more "playful" feeling.
I found the opposite with longer stems. went from 40 to 45 to 50 - Each time the steering felt less twitchy when bombing straight down chutes and with the longer stem I found it easier to stop the front wheel tucking, like if I was cornering hard right I felt the bar was heavier and less willing to turn. On the shorter stem steering felt a bit lighter and less gradual, on the same hard right i felt i had to think more about counter steering.

man this shits hard to explain. Crazy how much such a small difference makes, getting moar stems to mess around with is a good idea, and if direct mounts a good few make ones that do 40/45 or 45/50.
 

kidwoo

Artisanal Tweet Curator
I found the opposite with longer stems. went from 40 to 45 to 50 - Each time the steering felt less twitchy when bombing straight down chutes and with the longer stem I found it easier to stop the front wheel tucking, like if I was cornering hard right I felt the bar was heavier and less willing to turn. On the shorter stem steering felt a bit lighter and less gradual, on the same hard right i felt i had to think more about counter steering.

man this shits hard to explain. Crazy how much such a small difference makes, getting moar stems to mess around with is a good idea, and if direct mounts a good few make ones that do 40/45 or 45/50.
The wobbly feeling from overly short stems is partially because you lose leverage over the steerer tube when the front of your wheel hits shit. Think about offest as giving rocks more leverage over your steerer tube.
 

jackalope

Mental acuity - 1%
Jan 9, 2004
7,681
6,076
in a single wide, cooking meth...
This thread is fucking amazing. Switched from a 35mm to a 50mm just to see what's up. It was a life changing experience. By that I mean: there's just no fucking way someone not named Greg Minnaar can tell a meaningful difference...theres just not, no matter what they claim.

I chalk it up to me not having much sensitivity to things like offset and laughably small differences in stack height, and I'm grateful to the FSM for that being the case.

Carry on.
 

jstuhlman

bagpipe wanker
Dec 3, 2009
17,221
13,973
Cackalacka du Nord
This thread is fucking amazing. Switched from a 35mm to a 50mm just to see what's up. It was a life changing experience. By that I mean: there's just no fucking way someone not named Greg Minnaar can tell a meaningful difference...theres just not, no matter what they claim.

I chalk it up to me not having much sensitivity to things like offset and laughably small differences in stack height, and I'm grateful to the FSM for that being the case.

Carry on.
1588125719981.jpeg
 

kidwoo

Artisanal Tweet Curator
This thread is fucking amazing. Switched from a 35mm to a 50mm just to see what's up. It was a life changing experience. By that I mean: there's just no fucking way someone not named Greg Minnaar can tell a meaningful difference...theres just not, no matter what they claim.
That's okay. We've gotten used to living in a country that can't tell the difference between their rights to get their hair did, and their neighbors' right to not die.

Might as well turn your stem around completely 180 degrees. It's probably 'stable' and you probably won't be able to tell much difference.


I mean I can't tell the difference between the following two jpegs so it must be bullshit











:D
 

jonKranked

Detective Dookie
Nov 10, 2005
87,958
26,324
media blackout
Anybody remember this dumb bullshit?



There's a reason no one does this. :rofl:

And it has nothing to do with 'reach'. Stem length is a handling component, not a fitting component. When people don't understand this, they do dumb shit like lengthening a top tube but thinking there's some single reach measurement that has to be maintained with the stem. Yeah how'd that work out. It's funny to look back and now everyone (hopefully) realizes that you can ride a longer bike with the same sized stem you had on the shorter one just fine.
Thankfully no
 

jackalope

Mental acuity - 1%
Jan 9, 2004
7,681
6,076
in a single wide, cooking meth...
That's okay. We've gotten used to living in a country that can't tell the difference between their rights to get their hair did, and their neighbors' right to not die.

Might as well turn your stem around completely 180 degrees. It's probably 'stable' and you probably won't be able to tell much difference.


I mean I can't tell the difference between the following two jpegs so it must be bullshit











:D
You say that like you don't think you can git yo hair did at the Peaceful Sleep Funeral Home. 2 birds stoned as they say in Sunny Vale, Canadia.

As for the stem realignment, I like the idea, but what if I turned it 179.8765911° rather than a cool (if boring) 180°? #LifeAltering
 

kidwoo

Artisanal Tweet Curator
little do you know, but those are my friend matt's glasses and were later given to eddie masters.
Where the hell you think I found that photo? :rofl:

You guys brought that up for like 3 months

 

Westy

the teste
Nov 22, 2002
55,720
21,746
Sleazattle
This thread is fucking amazing. Switched from a 35mm to a 50mm just to see what's up. It was a life changing experience. By that I mean: there's just no fucking way someone not named Greg Minnaar can tell a meaningful difference...theres just not, no matter what they claim.

I chalk it up to me not having much sensitivity to things like offset and laughably small differences in stack height, and I'm grateful to the FSM for that being the case.

Carry on.

I have mentioned this before, but your brain is an amazing control system that can adapt to a lot of different situations. Stem length probably changes the dynamics of a bike a few percent at best. Swap two stems of different length out and most people will be able immediately tell. Then after a while riding it, they will adapt and at the end of the day it will make little difference. Perhaps if you are trying to shave a few tenths from a 3 minute run it may make a difference, but that will only impact 40% or so of the people here.
 

jonKranked

Detective Dookie
Nov 10, 2005
87,958
26,324
media blackout
Where the hell you think I found that photo? :rofl:

You guys brought that up for like 3 months

You're just jealous you missed all the fun.
 

dexter

Turbo Monkey
Sep 23, 2001
3,053
99
Boise, Idaho
You're just jealous you missed all the fun.
Flipping through those photos made my fake hip hurt, pretty sure that's where i dislocated it the first time and ended up needing surgery a few years back. Slammed a tree mid air going mach 10 after blowing a turn in the greasy mud.
 

jonKranked

Detective Dookie
Nov 10, 2005
87,958
26,324
media blackout
Flipping through those photos made my fake hip hurt, pretty sure that's where i dislocated it the first time and ended up needing surgery a few years back. Slammed a tree mid air going mach 10 after blowing a turn in the greasy mud.
Yea but world cup spectating is a different level of partying.
 

marshalolson

Turbo Monkey
May 25, 2006
1,774
531
I’d suggest putting a Monster T on it (20mm axle), so he could have run the bars upside down, while maintaining the same total stack height to his bars.
 

HardtailHack

used an iron once
Jan 20, 2009
7,455
6,770
After putting a phone on my E-Bike's handlebar I found that the phone would create lift at high speed and make the front end unstable, so I did this 1 Simple trick-
 

Bikael Molton

goofy for life
Jun 9, 2003
4,088
1,235
El Lay
Welp, all I can say is that going to 50mm and no spacers from 40mm and a 15mm spacer is "different". The extra reach is good though.
The trails I've been riding lately have been so sandy that it's tough to tell what is even happening in the corners.
:bonk:
 

englertracing

you owe me a sandwich
Mar 5, 2012
1,649
1,137
La Verne
After putting a phone on my E-Bike's handlebar I found that the phone would create lift at high speed and make the front end unstable, so I did this 1 Simple trick-
No fucking way.
I've got a damper on the mx bike, it lives turned wayyyy down on the low speed to the "its not there" setting... the high speed circuit is what does the work. Because the thing totally kills feedback and feel on loose stuff and slow sand, however 70+mph sand its nice to have it cranked up especially if your tired, but its really shit when you get back into the technical.

So on a bicycle im not seeing many positives.......
No feel through the bars...
 

Robert111

Chimp
Dec 24, 2020
1
3
I installed Syntace Force a few weeks ago. This is my first experience with a syntace product, and so far a positive one. This was a replacement for my FSA OS which I decided was a little too long for me (120mm). The 100mm F109 Stem seems to be well made, nicely finished and looks great,although the carbon face plate of my FSA did provide a visual advantage over the twin hollowed out aluminium semicircles used on the F109, but i guess the paring off of 50 grams had to come from somewhere. Installation went smoothly and there's no notice of flexing while riding, despite the ridiculousely light weight of the stem. I'm happy.
 
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