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Please look at these stems...(10 posts)

Please look at these stems...briko51
Aug 27, 2002 4:52 PM
are they 130mm or over? These two pics are from cyclingnews.com's coverage of bike of the '02 tour. Kroon's and Fagnini's. Do they make over 130mm stems?

http://www.cyclingnews.com/tech/2002/features/tourbikes/images/Krooncockpit.jpg
http://www.cyclingnews.com/tech/2002/features/tourbikes/images/TelekomPina2.jpg

I was recently at a shop looking at some Trek's and told the guy that for my size i'd probably need a 58cm frame with a 130mm stem. (i currently ride a 57cm tt + 130mm stem)...and the Trek would be 57.2cm tt+130mm stem...

He look at me like i was retarted! like "how on earth could you use a stem that long!!!"...i know they are pro's, but seems like all the bike i look at of the professionals have long stems...am i crazy???
re: Please look at these stems...High Gear
Aug 27, 2002 5:26 PM
I have heard that the European pros Build their frames with shorter top tubes and go long on the stems. I think 130mm is the limit on most pro bikes. I don't see any advantage of going real long. I used to run my stem longer and up higher but since refitting myself after purchasing my Cyfac I'm running it lower and shorter.
One other thing on TT length...High Gear
Aug 27, 2002 5:38 PM
Seat tube angle really comes into play on how the TT length will work for you. For instance my Cannondale has a 73deg. ST angle and my saddle is all the way back in order to have my knee over the pedal where I want it. By doing this I now have a longer TT than I want, so I am forced to use a 1cm shorter stem than my Look frame that has a 72.5 deg. ST angle and same TT length. To me seat tube angle is just as important as TT length.
One other thing on TT length...briko51
Aug 27, 2002 6:23 PM
thanks for the replies...

yeah, i just felt weird when this guy looked at me like i was crazy for having a 130mm stem...just curious if anyone else used one as long...
One other thing on TT length...Akirasho
Aug 27, 2002 7:40 PM
... hell, I run 140's on a couple of bikes (long monkey arms).

We abide.

Remain In Light.
One other thing on TT length...mackgoo
Aug 28, 2002 2:04 PM
it's taken me 2 years to understand thisJS Haiku Shop
Aug 28, 2002 6:18 AM
but that makes perfect sense now. tt + sta will determine seat position, which will determine stem length and/or rise. oh, and the type of handlebar is important, too (reach, depth, etc.). it's not rocket surgery. or is it?
Longer Stem = Stability, ControlSpunout
Aug 28, 2002 6:35 AM
The Eddy Merckx model, this puts the hands over the front axle. For riding over the cobbles, it is more stable.

Although I haven't tried this, it is feasible that a longer stem puts a longer lever around the steerer tube. This longer lever is more powerful and stable just from your hands holding the bars straight.
Longer lever?cyclopathic
Aug 28, 2002 7:11 AM
lever is marginally longer. if you take 2 opposite cases 9cm and 14cm stems on 42cm bars the lever would be only 10.5% longer.

Second on longer stem force vector will be more angled, so that 10.5% has come from muscles controlling side to side movement, not triceps which are much more powerful.

If you look at Eddy's pictures he rides with almost straight arms, and this is why he needs longer stem. Extended arms benefit in 2 ways: first less road shock is transmitted, second arms produce more force at near straight position then they do with 90 deg bent elbows. So it isn't stem, it is arms and longer stem is just the way to get it IMHO
It looks like....853
Aug 28, 2002 7:14 AM
It looks like the pro's are using the smallest possible frame for it's lightness,stiffness and agility.
And making up for the rest of it by raising the seat and getting longer stems. Look at the height of the seat - it looks like he could possibbly use a bigger frame. But in this case maybe - smaller is better. You have to be pretty limber to ride that bike - almost no spacers.