JX8 Gekkota. Goldilocks Gummy Tire Arrives. The JX8 GEKKOTA was developed and tested with help of top Hard Enduro Endurocross riders in most extreme conditions to making another gummy tire option for single track riders and top pro Hard Enduro / Endurocross riders. Carcass Structure: Updated carcass structure to 3-ply construction to enhance overall rigidity to provide excellent stability going through challenging obstacles. Dual Compound: Using IRC's well known super gummy compound on the tread for maximum grip, combining with stiffer sidewall to manage flexibility for straight drive stability. Block Design: Extra rubber support on the bottom of the center knobs optimizes rigidity to deliver next-level longevity performance as a gummy tire. Tire Specifications: Type: TT. L.I.: 64M. Overall diameter (mm): 690.