NextLevelFoam (Ibex, Huge Pin) 2.2" Rim 5.5/5.8" Tire for Comp Crawlers (MOA/Sporty)

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This is a tire insert model to print in TPU for 2.2" wheels for RC Crawling "exclusively ". This tire insert has two parts that need to be printed. Both model files are included (STL files) and project files for Cura settings (3MF files). These were designed to perfectly fit with 5.5" and 5.8" tall tires for comp crawling (Proline Ibex and Huge Pins), like MOA, Sporty, Shafty, etc. There's also an alternative insert to fit Loaded Dice (77.5mm diameter, 22mm wide).

The model has 2 parts, the outer part which needs to be printed in very soft TPU (NinjaTek 85A recommended), and the inner part which should be printed in a firm TPU (Overture 95A works well). This allows RC cars to have great traction while keeping the tire shape, adding grip, and making the car predictable during crawling. The exclusive design is made to provide extreme support of side crawling and sharp turns.

Check the video for a design explanation:
https://youtu.be/BvbvU8OZVoU

Read 3D printing settings carefully, as is critical to get the right outcome. The inner part will take ~4hrs and the outer part ~4hrs to print.

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https://www.facebook.com/groups/d440rc

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https://www.instagram.com/d440_rc/

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The model uses Ultimaker Cura slicer infill patterns to model the outer part, providing full flexibility to the user to configure the tire insert as they like. The download includes 3MF files to "Open As Project" in Cura, which includes the print settings (highly recommended to use project files).

This must be printed in TPU, wall line count 1, and 0.2~0.24 layer height. Make sure your TPU settings are performing well. Printing Gyroid usually needs good cooling and slow speed.

The inner part (main insert):
Print in TPU with hardness higher than 90A. Overture 95A works well. For normal rig weight, I like to print these with a 0.3mm nozzle at 100% Flow. They come out firm (they should be firm). Set "infill" setting to 0 (no infill). Use the Project file to get settings out of the box. If your rig is too heavy and you want a firm inner, print with a 0.4mm nozzle and/or get a harder TPU. This part should be ok to print fast if your printer is capable (30~40 mm/s).

The outer part (soft ring):
Print in very soft TPU, the softest you can get. Ninjatek 85A works well. 0.3mm nozzle exclusively and adjust FLOW to get a soft print. If you can't get Ninjatek, try Sainsmart 92A with 90% flow. This print needs Gyroid infill, 6% works well with Ninjatek 85A. Infill UP or DOWN if you want softer or stiffer ring. This part should be printed slow (20 mm/s). This part also needs "Setting Overlap" to add wall line count 2 at the base, since the angle is hard to print, it will make it stronger and add side support. Use project file!.

In my facebook group there's a lot more info on how to print these inserts and what to expect: https://www.facebook.com/groups/d440rc