SCX6 2.9" Tire Insert (Foam) for Scale Crawlers

Just to make things clear, my designs are protected by copyrights laws. It is not authorized to distribute or sell any of my designs without prior written authorization from myself. Even if you modified my original design. Thank you.

UPDATE 10/12/2022: A new version has been added with a 160mm diameter for XS tires.

UPDATE 6/16/2022: A new version has been added with a 164mm diameter. Some people were saying the 172mm diameter ones were folding inside in some tires, so this gives an option with smaller interior diameter tires.

This is a tire insert model to print in TPU for 2.9" wheel diameter tires for Axial SCX6 tires. Read carefully the 3D printing settings below to get the desired outcome, as the SCX6 is heavy, getting the right setting to have a strong insert to hold the weight while also soft in the outer layer to give traction is key.

The model has 3 layers that provide progressive resistance to the tire surface, from very soft to stiff in the center. This allows RC cars to have great traction while keeping the tire shape, adding grip, and making the car predictable during crawling.

These models cannot be stretched on the X/Y axis (insert diameter) since it will impact the design, but you can stretch them as you want on the Z-axis (insert width) In case you want to fit them in a wider or narrower tire or wheel.

Read 3D printing settings carefully, as is critical to get the right outcome. Each print will take ~14hrs and the result will weigh ~6.6oz if set up correctly.

If you need help, please reach out on my Facebook page: https://www.facebook.com/groups/d440rc

Many thanks to Justin Mcpherson for helping test this model.

You can sell 3D printed parts designed by D440RC, but need to comply with four simple rules: 1) Respect the brand, make it clear this is D440RC design, and don’t change the original name/brand helping advertise model purchase in Cults, 2) you need to buy/download the models you want to sell, 3) prints must be in good quality, 4) you can only sell 3d printed parts, you CAN NOT sell/give away the models/files, those are only for you to keep.

The model uses Ultimaker Cura slicer infill patterns to model the soft layers, providing full flexibility to the user to configure the tire insert as they like. The model will include 3MF file to "open as project" in Cura, which includes the print settings.

The recommended print setting for SCX6 is Gyroid with 6% Infill. This may vary depending on the filament you are using, you can try 5%~10% depending on how soft/firm you want it.

The insert must be printed in TPU (tested with TPU 95A), 0.4mm nozzle, wall line count 2, NO Fill Gaps in Between Walls, No Top/Bottom layers, Support for the inner ring, and 0.2~0.28 layer height. Make sure your TPU settings are PERFORMING WELL. Printing Gyroid Infill usually needs good cooling and slow speed (I do 30mm/s on wall/infill and 60-100% cooling fan - but this will depend on your printer capabilities). Make sure you have a good layers adhesion to result in a strong insert.

I also added two "Setting Overlaps" in the Cura Project file (3MF), one at the bottom of the model and one at the top. This allows adding "Wall Line Count 4" to get a stronger wall on the curved corner of the outer layer of the model. This is also part of the 3MF Cura project file (Open as Project). The purpose of the setting is to make the tire insert to support better the RC car on side crawling.