Fastr-X Tire, 20 x 1-3/8"

- Pressure-sensitive traction system featuring sticky bristle knobs encased within a recess enabling an ultra-low tread profile \n- GRIP-PODS activate automatically with natural riding motion for on-demand traction with minimal disruption to forward momentum\n- Special chemical surface etching applied to center tread creates fine surface texture that enhance traction on wider variety of track surfaces\n- UTC rubber compound\n- 60 TPI casing