Little update on my wheel extension experiment.
The 3d printed mold worked great. But even though i put a layer of vaseline on it the wheel just wouldn’t come off so i had to destroy the mold. (Since it can’t be reused i’ll redesign the mold so it uses less material and is easier to destroy).
My first try casting the PU looked really good until I got tore apart the mold and the bottom was uncured.
Don’t know what happened here. Maybe on the first mixing batch I got the proportions wrong or mixed poorly but I did exactly the same thing on my second attempt and it came out great!
This 70A PU has a really short working time of 40 seconds. Really hard to work with but it was some of the only PU I could find here in Brazil.
And since I botched the first one and wasted some PU on some tests I don’t think I have enough left for three more wheels, but can cast another one for sure. Then I’ll ride them and see how they feel.