|Litespeed tubing question!||kushogun|
Dec 5, 2003 12:40 PM
|Hello ladies and gentlemen. I was curious if you could help me with a few questions regarding Litespeed tubing. As most of you know the majority of Litespeed new frames utilize their G.E.T. technology utilizing multi-shaped tubes. I was curious if any of you knew if Litespeed has come up with a new way to draw the tubes in these shapes, or if they simply take a sheet of ti, shape it, and then weld the seam. Any help would be appreciated.|
Dec 5, 2003 1:55 PM
|re: Litespeed tubing question!||Nessism|
Dec 5, 2003 3:19 PM
|Litespeed forms their GET shaped 3/2.5 Ti tubes via "coldworking". This means they take a preformed tube and shape it while the tube is cold. This can be done in a variety of ways including using rollers and mandrels, but I'm not sure what exact method Litespeed uses. One thing is clear though, they start with a standard straight gauge round tube and shape thereafter.
The 6/4 Ti tubes start as a sheet of metal and Litespeed makes the tubes by folding/rolling them into tubes and welding. While some say welded tubing in inferior, I don't think this is necessarily true. Litespeed has an excellent reputation and there's nothing to worry about regarding how they make the tubes.
|re: Litespeed tubing question!||zippi|
Dec 5, 2003 10:07 PM
|i recently asked holland(one of the best ti frame builders in the country), this question and the answer is quite simple. litespeed, like every car builder feel they need to change something every year to make it "new and improved". why buy 2004, when you can get the same 2003 at a discount. basically it comes down to selling as many bikes as possible. round tubing is torsionally stiffer than GET tubing. it's proven! frame builders have known this since the 1800's. so why does litespeed use GET tubing? because it looks cool and it sells bikes.(they got me) i compared my 2003 vortex, which is not stiff like you all say it is, but it looks cool, to several holland's, a couple seven's and a few serrota's and my litespeed has more flex in the bb and headtube (i'm skinny). i'm not saying i don't like it, i'm just warning you, don't get caught up in the hype. "new and improved" is not always better. the good frame builders rarely need to "improve" what already works.|
Dec 6, 2003 10:02 AM
|The loading in the down tube at the bottom bracket is a combination of both lateral bending and torsional loads. To resist these loads, the best shape is a moderately ovalized tube with the oval shaped in the lateral direction. Tall, vertically ovalized down tubes, like those employed by Litespeed, are OK for torsional loads but are shaped in the wrong direction to resist lateral loads such as those that cause front derailleur rub.
The bottom line is that there is nothing wrong with GET tubing only that some of the tubes are not shaped in the proper direction if one is looking for bottom bracket stiffness.