These aluminum Crusher Flares are light weight-at only 9.6 lbs. per fender-yet durable. Like in the front, the original equipment rear flares are flimsy plastic which can tear off and are easily damaged on the trail. Poison Spyder's Aluminum Rear Crusher Flares for JK are precision-fabricated replacements that are light weight and built to handle moderate trail abuse. The Poison Spyder JK Crusher Flare provides tire coverage for up to a 40" tire (minor trimming of the inner sheet metal may be required for tire clearance). The Crusher Flare's mounting plate is made of CNC laser cut 3/16" thick aluminum plate that has been brake-formed to fit the contours of the JK's flare mounting surface like a glove. The Crusher Flare rails are CNC-bent 1.5" X .199 wall annealed aluminum structural tubing, with a fender surface made of 1/8" laser-cut aluminum plate. The Crusher Flare mounts using stainless steel countersunk flat head cap screws that provide a low profile, great looks and corrosion resistance. Installation requires drilling and installation of the provided nut-sert fasteners. Poison Spyder supplies a simple nut-sert installation tool to facilitate the process. Crusher Flares are sold bare, un-coated. For added structural rigidity, Rear Crusher Flares come with a 4-piece Inner Brace Kit. The Inner Braces are engineered to provide the internal structure to keep the Crusher Flares from deforming the Jeep's outer tub sheet metal on impacts. The components are laser-cut and brake-formed to precisely fit between the Jeep's outer sheet metal and the heavier gauge steel of the structural inner tub. The result is a Crusher Flare installation that will withstand serious hits from the rocks. The .188 wall tubing and Inner Braces yield a lightweight aluminum flare that is stronger than any other aluminum flare on the market, and even stronger than steel flares that are not internally braced.; Not sure whether to choose steel or aluminum for your Crusher Flares? Aluminum is