NTKK (Panaracer) "Snakebelly" Old School BMX Tire
Remade by NTKK, the original maker of the "Snakebelly" tire. NTKK made special "Snakebelly" tires for Cycle Pro and Mongoose. Redline used this model on some of their bikes.
Note that unlike the 20 x 2.125 tire the text (e.g "Made In Japan") is pressed into the skinwall