IRC Heavy Duty Tube - 2.75/3.00-21 - TR-4 Stem T20076<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Impressive joint and valve strength; for Valve Stem Types see above</li><li>Two to three times thicker than standard tubes， IRC heavy-duty tubes are incredibly durable， abrasion-resistant and feature great impact-absorption</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41Xo4gnXusL.jpg" noproxy>