Ofna Truer comes with a bit. We moved the bit all the way in, and it looks like it will efectively cut a tire to as small as 1.5", so you can really trim up those 1/12 tires.
We moved the bit all the way out, and it looks like you should be able to cut and finish a tire to 3.20" tall as well.
Both of those measurments are the diameter of the tire. Pretty cool looking and great working truer. Be a great addition to your racing program.
If you`re using a power supply, at least 15 amps is recommended.