nice one… they keep getting better!
I remember when you first started posting.. 
you have improved a lot! keep up the good work-
Senior Kyle
My progression is not only by myself. Here, I learn many things from you and other experts, even through reviewing your works in the gallery, also reading the questions, answers, and solutions.
There are many commands and techniques in Rhino that I have not used or exercised yet, because I need work and work to become familiar with; and learning these significant issues is possible through getting help from the experts and other skillful persons here.
The McNeel website not only is a necessary reference for novices like me but also is a community for experts to share their knowledge and experiences to advance their processes better in the future.
However, whenever I visit here, I learn somethings new from you and use them in my next works.
Thank you very much 
To make you wheel more realistic add a “drop center” to the cross-section. The drop center is an area which is smaller diameter than the diameter at the inside of the tire bead. It allows the tire to be mounted and dismounted. For an examples of profiles see pages 22-23 of this paper: http://ftp.demec.ufpr.br/disciplinas/TMEC078/Aulas/Cap%201%20-%20Pneus/cap-1-pneus.pdf
thats some amazing tire info
nice rims
there is an evolution for this which involves different offsets and re using the revolve curve for the spoke profiles
i will leave that as a hint for anyone to explore
Thank you, senior CADARTZ
Thank you, senior CADARTZ
I hope someday I can design complex engineering devices like you 
I think you can already
It’s just the will, patience and time you need
For me it’s inspiration from other artists when I was starting it was mostly vitaly bulgarov and Andre kutcherauer, in today’s time you have Scott Schneider, kyle houchens just to name a few..
They also post their work on here and other parts of the internet with a bit of research you can get some insight about their thought process as well as study their modelling
…Also alot of music, motivational music goes a long way when doing cad for me
It’s easy to say, but what about in practice? Advancement doesn’t happen at once or by chance. As you pointed out, will, effort, and time are the topmost factors for progression, and I add interest or love to a job.
Nevertheless, knowledge, experience, and skill are the fruit of these factors. We also should not forget talent.
Without knowledge and experience, talent cannot help in this way anymore.
Suppose that I’m a talented person! What’s the point when I don’t have enough knowledge in a field? So learning sciences, techniques, and methods from knowledgeable and experienced people or rich references is the only way toward growth and advancement, as you pointed out.
Therefore, study, being in the presence of a proficient and experienced teacher, and practice, are in the form of a ladder to go up in the sciences.
That is what I do on and off. I not only wish to learn modeling with Rhino professionally, but also try to learn every useful science and technique that quenches my thirst!
After I saw the vacuum cleaner that you designed masterfully with many precise techniques and engineering details, I felt a flame of interest in my soul!
It was not envy, but was the start of a perception that I am in which point. Afterward, I decided to move gradually toward a higher level of proficiency in modeling with Rhino.
I noticed that modeling such engineering objects is not possible simply by chance or low knowledge and experience. Thereafter, I began to model things more accurately with the techniques that masters and experts use.
My advancement was not notable; nevertheless, I am happy with this perception and little progress. As you expressed, effort and time are two significant determiners for progression in modeling; that is what I follow.
Thank you for your grace 