The rear fenders were so fresh that we actually painted and installed them during the check-in for the event in Texas. Both the front and rear have a tube frame with 1/8-inch steel skin. The fenders have extra bracing added to the tub for support since the thin bodywork would barely support the fenders alone. We didn't lay the entire weight of the Jeep against the fenders, but when squeezing between rocks and trees they did get rubbed at times and held up excellently. We were also able to stand on them to access the bed or engine bay of the Jeep.