I will show my project that is about to be finished, first, some explanation :
- what is it about? a bike part
- which one? the rear disc brake caliper holder
- which standard/diameter? Post Mount 180mm
- why don't you change your adapter? because I'm fed up with adapters!! I want a 1 piece construction, light and STIFF!
- can't you buy this dropout?? nope, the (french) bike brand went bankrupt at least 5 years ago!
- is it worth the time/money spending??? ENOUGH with these stupid questions
of course it's worth it, learning using FreeCAD and helping the community are worth a few hours/$ extra!
+ the home made, one-off is exciting!!
Ok, let's look at the pics instead of talking!
The bike I built...almost 2 years ago already??
Details on the adjustable rear dropouts :
As it is now, International Standard (axial) + Post Mount (radial) adapter for the caliper, 160mm disc :
Let's go to the CAD side of the force, stock dropout on FreeCAD :
Rough 3D modeling of the adaptor (IS to PM) on a random frame :
Early design of my part :
Another trial :
After a review with a friend, I changed the way of building the part, and the design looked like this :
Another review later...as it was too far from the original spirit of the bike (my friend also owns one of this brand) :
In this topic
there are more details about the final shape :
In this topic
, you can find more FEM pics :
I then contacted a colleague to 3D print what I wanted to validate, before sending to my friend in the machine shop :
Put it on the bike to check :
I did some minor modifications since then, and I am busy with the 2D drawings :