Material6061-T6 alloy, flash welded Size Size38x19mm, 36h, Diameter 421, ERD 387, ETRTO 406   Features • Super heavy-duty rim for the most brutal riders in the game• The strongest rim we’ve ever made, seriously…• x5 chamber construction and unique super tall outer wall for maximum stiffness• Increased material thickness in critical areas• Straight side walls for brake use• Does not require kitchenware to install tires Weight580g / 20.4oz