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How To Cut RC Tire Foams For Rock Crawling

Article by Hunter Wick

First off, some may ask why it is even necessary to cut the foams in your crawler's tires. Well, the honest answer is that it's not absolutely necessary.

It can however, boost the performance of your crawler without having to purchase anything additional. And saving money is always a bonus!

For those who don't know, tire foams are pieces of circular foam that fit into the tire to give it support since most RC tires aren't pneumatic, or filled with air. This is a step by step guide on how to correctly perform this completely free modification.

rc tire foam 2

1. If the wheels and tires are already mounted on the vehicle, take off the wheel. Then, disassemble the wheel if you are using bead lock wheels, or use acetone or boiling water to unglue the tire from the wheel if glue was used.

2. Now, take the foams out of the tire if you have not already done so. Decide if you will be cutting the front and the rear tires' foams the same, or differently, or maybe just not cut the rear foams at all. I personally like to leave the rears alone as these usually have to support more weight, but feel free to experiment as foams are generally very inexpensive.

3. Once you've made your decision, begin cutting. This can be done with heavy duty kitchen scissors (or something equivalent) or possibly even some lexan scissors. I like to use kitchen scissors, because these usually have no problem cutting through the soft foam.

4. How you cut the foams is really up to you. It's usually best to cut in some sort of pattern as shown here, but ultimately it's whatever works best for you. Just remember the more material you remove, the less support the tire will have, allowing it to squat, but gain traction, and vice versa.

rc tire foam

5. Once you've cut your foams give a good check over all of them and be sure there are none that have been completely severed in half and that you are happy with the results.

6. Finally, install the foams back into the tires and the tires back onto the wheels. Then, reattach the wheels to the vehicle. Make one final check to make sure the tires are securely fastened to the rc's wheel.

7. Now it's time to test out these new foams! Just go have fun.

As you can see, cutting your tires' foams really isn't that hard of a task, but some people never do it because they are afraid of damaging their new foams. As I stated before, foams are cheap! Don't be afraid to experiment! If you make a mistake and cut a foam insert completely in half, usually a small application of CA glue will fix this problem, or you can just buy a new set of foams. But that's enough talk for now... It's time to go out and see what those new foams can do!

rc tire

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