Flipping the stem....
#26
Senior Member
Joined: Aug 2010
Posts: 790
Likes: 0
From: Twin Cities, MN
This is just plain ass wrong. Why would you make a claim like this which you obviously haven't verified in any way?
The shallower your angle is (like on a small cyclocross frame), the more reach will be affected by flipping. The steeper it is (like on a tall road race bike), the less reach will be affected.
But just for sake of numbers, lets do the math for a shallow 71.5 head tube all the way to a steep 73.5 headtube (numbers are for a 120mm 6 degree stem):
shallow:
flipped: 120*cos12.5 = 117.16 not flipped: 120*cos24.5 = 109.20mm (diff is 7.96mm)
steep:
flipped: 120*cos10.5 = 118.00 not flipped: 120*cos22.5 = 110.87mm (diff is 7.13mm)
So you might say for all typical bikes, flipping a 120mm 6 degree stem will give you a 7 to 8 mm reach difference. That's pretty damn significant.
The shallower your angle is (like on a small cyclocross frame), the more reach will be affected by flipping. The steeper it is (like on a tall road race bike), the less reach will be affected.
But just for sake of numbers, lets do the math for a shallow 71.5 head tube all the way to a steep 73.5 headtube (numbers are for a 120mm 6 degree stem):
shallow:
flipped: 120*cos12.5 = 117.16 not flipped: 120*cos24.5 = 109.20mm (diff is 7.96mm)
steep:
flipped: 120*cos10.5 = 118.00 not flipped: 120*cos22.5 = 110.87mm (diff is 7.13mm)
So you might say for all typical bikes, flipping a 120mm 6 degree stem will give you a 7 to 8 mm reach difference. That's pretty damn significant.
Though I still believe stem length should be primarily used to get to a proper horizontal reach. This is just what I believe and if I'm wrong about that, I'd love to know as well.
Last edited by ErichM; 09-10-11 at 11:43 AM.
#28

Yeah...he should have gone thru door no. 2 but he wouldn't have won so he was gonna lose anyway.
Too bad...otherwise a nice guy who just happened to not cheat as well as the others.
#29
Senior Member
Joined: Jun 2011
Posts: 233
Likes: 1
From: Little Sweden, USA (Lindsborg, KS)
Bikes: Bianchi Infinito Celeste, Trek 7.5 FX, Felt Z6
#30
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
Likes: 0
From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
I was basing my response on a chart I had looked at, at one point. Doing the math though myself the difference in horizontal reach is more than I had realized. Apologies for the bad information.
Though I still believe stem length should be primarily used to get to a proper horizontal reach. This is just what I believe and if I'm wrong about that, I'd love to know as well.
Though I still believe stem length should be primarily used to get to a proper horizontal reach. This is just what I believe and if I'm wrong about that, I'd love to know as well.
#31
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
Likes: 0
From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
#33
You blink and it's gone.
Joined: Mar 2005
Posts: 4,436
Likes: 0
From: Dundas, Ontario
Bikes: Race bike, training bike, go fast bike and a trainer slave.
Yup...When I flipped my stem I had to switch from a 110 to 100...Same for my wife when she made the move...
Both were done to achieve proper fit as our bodies got use to being on a bike...
Both were done to achieve proper fit as our bodies got use to being on a bike...
#34
Senior Member

Joined: Oct 2002
Posts: 10,664
Likes: 7
From: Someplace trying to figure it out
Bikes: Cannondale EVO, CAAD9, Giant cross bike.
Um...no. Flipping the stem is more of a joke on here than anything else. Stem position has to do with the geometry of the bike relative to the proportion of the rider including his fitness and flexibility. I am long legged and ride with a shortish head tube for my leg length and therefore ride with my stem flipped up.
If anybody thinks that stem down is good for everybody they are wrong.
The guy that raced the bike below in the TdF could easily drop anybody on this forum with slammed/inverted stem and 6" of drop.
Handlebar height has to match the rider's capability and stem position is just a means to putting the bars in the best place for a given rider.
A 75 year old guy who used to be a top racer may now prefer his handlebar level to his saddle. Bar height and reach is unique to each rider.
If anybody thinks that stem down is good for everybody they are wrong.
The guy that raced the bike below in the TdF could easily drop anybody on this forum with slammed/inverted stem and 6" of drop.
Handlebar height has to match the rider's capability and stem position is just a means to putting the bars in the best place for a given rider.
A 75 year old guy who used to be a top racer may now prefer his handlebar level to his saddle. Bar height and reach is unique to each rider.
I, too, have the same issues as you. I also like climbing from the drops. Especially short steep climbs.
For those of you that want to, google Marco Pantani for bike setup.
#35
Speaking of Pantini's and his climbing prowess...his 1998 TdF winning Bianchi below and an article about the great man. Take note of the huge gears he could push:
https://www.cyclingnews.com/features/...-reparto-corse
Last edited by Campag4life; 09-11-11 at 10:01 AM.






