A new approach to fit bigger wheels (5-6inch ones on 8mm axle)

[danile]

Good morning

This is a short summary of the following post: http://dosimplecarbon.com/fitting-bigger-wheels/ Recently, with a lot of help from @Okami, I was thinking about new approach of mounting bigger wheels to esk8. How do you usually mount a 5-6" pneumatic wheel on a regular truck? The standard practice is to use some kind of extension on the axle. This approach increases the loads on the axle beyond the intended values, this is never a good thing. Now, what if we used mechanics and balanced these new loads? Look at the following diagram:

The picture is of a basic model that I used to do a preliminary stress analysis, but the results are very promising, consider these two pictures of stress distribution:

The good thing is that you can adjust the offset as you like and the stresses will still be low and actually the truck will suffer much less! I intend to make the brackets from Aluminum, and for now I simply printed them to see the fit:

This approach still needs work and several topics to solve, but I think it has great potential.

Would like to hear your opinion on this.

Thank you.

Enjoy, Dani

[flywithgriff]

How would you attach a motor mount? How would you overcome the loss in height without adding an inch of risers?

[Okami]

For now I think a bigger thing is to fix the ‘new axle’ in place on top of the old one…

Otherwise, im sure @danile will come a solution how to get the right height and add motor mount, after the initial details have been designed

[danile]

Don’t know about the motor mount yet, should be fairly simple fix. Regarding the height loss, I actually think it’s a positive thing. You will raise the board once you put in bigger wheels, this approach can maintain the original height, thus preserving the overall stability.

[danile]

You are right, the main issue is how to fix it in rotation about the original axle. The retainer can be incorporated with the motor mount, can be interesting.