Next Gen Traction. NITRO Mousse 5150 and TUBLISS. The best of both worlds for the ultimate hard enduro setup! The NITRO 5150 insert is designed to work with the TUBLISS system (sold separately) to provide even more protection and substantially increase stability allowing you to run extremely low (or zero) PSI for insane traction gains. The channeled crown allows for use with sealant and provides for a much more progressive feel. Available in Platinum and Plushie compounds, includes NitroLube for added durability. Fits 18" and 19" tires size 110 - 140.