DIY Custom Tire Lettering

Is there anything more race car than white tire lettering? Years ago I drew in the letters of my Yokohama tires white paint pen, but found that it was tricky to paint neatly, took multiple coats, and yellowed quickly. Wanting to get back to that look, but with a more professional setup, here is making custom rubber letters for the Falken Azenis’s.

Miata with Yokohama S. Drive tire lettering back in 2016

There are plenty of sources for brand logo svg files online, even the “Falken Azenis” logo is downloadable as an vector image on Falken’s website, so I started with that. It turns out, the stretch and arc of the tire lettering is so extreme on the tire sidewall, that the original graphics would need to be distorted completely. Because of that, I resorted to creating a new vector image by tracing directly off of the tire.

Pencil letter tracing directly off the sidewalls
Creating an SVG in Inkscape by tracing a scan of the pencil rubbing
First test of the lettering vector file with temporary pink sticker vinyl

It was difficult to find the right material to cut the letters from. Tirestickers.com claims they use a “specially created dual-layer synthetic rubber compound.” The closest I could find for this experiment was 1/32″ rubber sheet material from McMaster-Carr, part number 8143k112.

Cricut cutting the tire letters from 1/32″ rubber sheet

After experimentation, the setting I found worked to cut the 1/32″ rubber sheet with the Cricut Joy was Cut Pressure: 175 with Multi-cut: 2x. This setting left the letters barely attached to the sheet at the pointed corners. One issue was securely fixing the rubber sheet to the cutting mat. I cleaned the rubber liberally with acetone and used an upside-down layer of removable adhesive vinyl as a backing.

Letters cut and ready to separate from the sheet

It was a challenge to nest the svg file of letters to all fit on as little material as possible. I bought two 12″x12″ sheets of rubber, but I was able to cut all of the letters for four tires out of just one sheet.

Arranging as many letters as possible on to each sheet of material the maximum size my Cricut Joy can cut (11.75″ x 4″)
Letters!
Gluing letters to the Falken Azenis tires with special TreadWear tire adhesive

The special rubber adhesive is basically cyanoacrylate super glue, which bonds almost instantly to the tire, without much room for error. By the fourth tire, I had found a method that worked well – align the letter neatly without glue, then while holding the letter down with one finger, peel up a corner and add a dab of glue to anchor the letter in place. After a moment for the glue to dry, it was easy to peel up and apply glue to the rest of the letter with the first dab holding it in alignment.

Before vs after of the cleaned and shined tires with the new lettering
First view of the lettered tires back on the car

It took a few passes with the rubber super glue, testing the corners of each letter to check which ones needed extra glue.

Falken Azenis tire lettering
First appearance of the tire lettering at Cafe Lotus 2024 Miata Meet
PartPrice
12″ X 12″ X 1/32″ Thick EPDM Rubber Sheet White 50A Steam Weather Resistant – McMaster-Carr part number 8143k112$10
TredWear Tire Decal Adhesive Professional Grade$12.49

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