First of all there was an idea, the idea of a new seperation of a stem clamping. Why not seperate the stem at the steerer tube?
First prototype of Intend Grace EN with 3 piece design - 2016
Awesome new design. It works, looks nice, the weight was great. But when it comes to small series production I started to ask around for offers from the milling companies. One was 495 Euro per piece, just the milling. I was really frustrated. Can it be, that a stem made in germany would be that highpriced ?
For the customer this would be around 800 to 1000 Euro for a stem. I cancelled the project.
The "newmen" Michi Grätz came up with a one piece stem. My first thoughts where "oh, all the guys will ask, which handlebar will fit". This always means lots of emails, lots of questions. But after a few weeks I was really keen on this idea.
Because it is - from technical view - the best solution to combine two tubes to each other. It is the lightest, most beautiful - and also cheapest solution. "Light, strong, cheap" - yes, take all of it! (some of you might think, cheap, hea? but for made in germany in small number of pieces, it is!)
A few weeks later the prototypes where done - a few month later the first series was done. Before this I had to make a dynamic test at EFBE-Prüftechnik. They told me "the stem has passed the E-Gravity programm" and asked me if I want to make additional onesided load tests....
"the stem also passed the additional tests, the small guy is really solid..."
But why is it that strong ?
One of the answers is "Mr Mattheck". He is a proffessor for trees. No joke. He developed the natural "chamfer", which differs slighty from a "engineering chamfer".
Left side: engineering chamfer
Right side: Mattheck's chamfer
The Intend Grace stem is made with this principles. So the test machine couldn't destroy it.