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The wood bike scares me. I’m not sure that you can make a bike out of wood like that without having larger pieces. Wood and steel/aluminum just don’t act the same for the design to look identical. I’m also chuckling at how the cables end – are they really planning internally run cables inside of wood?
The second bike is yet another “designed for no one” type of bike. A super racey looking bike, except with flat bars and a battery pack as high up as possible? Good luck! I’d recommend taking a second look at those spokes too, as the moment you apply the brakes you will shred the wheel into pieces because there’s no tension on spokes that only go in one direction from the hub.
I’d like to see someone actually design a frame without assuming that proprietary wheels, handlebars, and shifters will be used. Given that even multi-thousand dollar bicycles still use standardized pieces for the most part, none of these fancily designed bikes are likely to get anywhere if they want to also design each part on the bike.
Where does one find CAD models of components e.g. dérailleurs, brakes mechanisms etc?
It’s likely much easier to assert that proprietary components are better (which just happen to be easier to model) than spend more hours modelling existing components than the overall design.
Industrial Designers aren’t Mechanical Engineers, so what do you expect? Especially if they have not specialised in designing bicycles.
You can find (almost) all parts needed to assemble a bike on Grabcad.
Also, if you are working on an actual product rather than concepts, some manufacturers are willing to share their 2D or 3D cad files with you. A phone call to a manufacturer will often save you hours of reverse engineering.