RC Tire Insert - 1.0" - Piranha - Outer Ring - MK2

7/28/2025 - NEW VERSIONS! Thicker walls, easier printing:

- Mk2 version prints without supports - Thicker walls for better toolpathing - Better angles produce less sagging - Vents are now diamond to print cleanly - Performance improvements Note: Multiple Print Profile for different sizes

Looking for a different size insert?

1.9" Wheels - 1/10 scale

RC Tire Insert - 1.9" Piranha - Multiple Sizes by fajitas21

Tire Insert for 1.9" Beadlocks 1/10 Dual Stage RC by fajitas21

1.0" Wheels - 1/18 and 1/24 scale

RC Tire Insert - 1.0" Piranha by fajitas21

1.55" Wheels - 1/10 and 1/18 scale

RC Tire Insert - 1.55" - UTB18 Capra, RC4WD by fajitas21

2.2" Wheels - 1/8 scale

Tire Insert 2.2" Bubble - Dual Stage RC by fajitas21

Description

I present to you my Piranha TPU printed tire inserts. While making them, they reminded me of the Piranha plants of Mario. Plus they bite well, so it fits. Please note I've posted several sizes, check which size you're printing.

Need help installing the beadlock wheels because of compressing the two halves? Try this:

RC Beadlock Tool - 1.0" wheels by fajitas21 MakerWorld: Download Free 3D Models

These work really well specifically on TRX4-M and Axial SCX24 and AX24 tires with some of the Injora and other tires you'll find in the 1.0" beadlock space. There's plenty of basic inserts out there, but the ones like this are typically behind a paywall, or the files aren't shared at all.

Notes:

This insert are for a 1.0" beadlock wheel, AND INCLUDES AN OUTER RING .

What does the outer ring do? It's a stiffer insert for heavier trucks. You can adjust stiffness with TPU material and brands, and then adding or removing a ring.

These are considered 1/18 and 1/24 inserts for most models, but specifically, anything for the 1.0" beadlock tires. It's tough to measure the inside of a tire, account for the width of the shell, and figure the right insert, so you might want to try a few sizes.

Best on TRX4M rigs, SCX24 and AX24 rigs. I imagine the FMS and other sizes would work well too.

NOT COMPATIBLE with larger 1/18th scales like the Capra 1/18.  That runs a much larger 1.5" beadlock wheel. I designed an insert for that one too, I'll post here and link soon.

Features:

- These are medium-soft compression inserts, and you can adjust depending on the filament - 95A is going to make them stiff. - 90A is going to make them medium. - 70A-80A is going to make them soft. - One off custom designed for the following conditions: - 0.4mm walls designed to print with a 0.4mm nozzle - No outer ring, the turbines act as the first compression stage, the smaller fins create the second stage. These are progressive, and use the shell of the rubber tire to keep them in place. - You must use a beadlock wheel, but you already knew that if you're into this kind of stuff. - I wanted minimal sidewall flex, but still some give. - Water proof. They won't work differently in water, which means you can safely vent your tires for better performance. I used to do sidewall vents but now just vent along the outer treads to fling the water our at higher speed. Boost Me As with all my models, I present these to you to do as you please. If you enjoy, please consider boosting me to fund future work. If you want a custom size, I'm releasing many different sizes, but try a DM to me to see if I have or can create one that would be good for you. Printing Notes:

These are designed for TPU. I've tried:

Overture - a bit stringy but soft. I suspect their 95A is more like 90A.

Hatchboxx - a bit stiffer, prints nicer, but 95A is firm.

TronXY - easy print, quite stiff, maybe 98A

Sainsmart 95A - It prints a bit stiff, but prints nicely. I'd say it's more 98A

I haven't tried Filaflex 70A, but for a lighter rig I bet it would be awesome.

NOTE: These inserts can be challenging to print, but a few notes to make it go better:

- Textured PEI beds are fine, but I'd use a release agent like Magigoo, TPU is tough to remove at times. - It might come out stringy due to all the travels and retractions. Adjust settings, but know the functional part is what matters. - Don't use Tree supports. I find the normal supports are easier to remove. - If you have delamination while removing supports, consider a slightly higher print temp (try 5C increments). - Dry that TPU if it's tough to print. TPU really does take well to drying. - I tried to make the print profile as simple as possible, but you may decide you need to tweak a bit. - Things to consider tweaking - Make sure there's no or low infill, these are designed to just be 2 wall loops on a 0.4mm nozzle. There shouldn't be infill at all. - Don't do top or bottom layers, just slows print time and doesn't add anything. Consider this you printing all infill, in a way. - Wall loops are designed to be 2. - Slow the print down if its struggling. TPU doesn't like to go too fast. Max volumetric speed around 3.2mm/s or so. - Consider retraction settings, do some research online, but a good place to start is 0.4mm retraction (default) to instead, try 0.7mm retraction. You will find this setting in your filament process. - Reduce or remove Z Hop. I set it to 0.