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:D You're right because you have experience. I am a cautious person and want to avoid a disaster...

User bastl-axel writes about the workflow of stretching a bike frame with heat: "It's really just relaxing in the metal structure. But only 5mm expand, then heat until a large area and allow to cool, and so on and so forth, until the dimension is correct. Steel must be about 10 mm flare so that...

A little misapprehension: I have vertical drop-outs. We have an interesting thread at the German Pedelecs Forum about stretching a bike frame by heating up and using a thread rod. Due to springing back of alu or steel you have to overstretch the frame. The heating up works with a hot-air gun...

Do you got problems with the no longer horizontal dropouts? After widen the frame the dropouts change themselves of a third degree. I have read this in a Wikipedia article of Sheldon Brown. http://wikipedalia.com/index.php?title=Rahmen_aufweiten http://sheldonbrown.com/

"A bit of leverage with two pieces of wood and a wedge soon had the frame 150mm wide." Is it a steel or an alu frame? My alu frame comes with the standard 135mm and I suspect to widen the rear frame section. Thanks for sharing your experiences with this double speed motor.