External fuel tanks by rear exit door.
Bad idea, the Russians learned from it in Afghanistan.
Possibly better than internal tanks that roast the crew alive if hit by an RPG. But the Stryker also has external saddle tanks in the fender walls behind the tires, subject to penetration and rupture from M203 HEDP rounds or the Russian GP-30 underbarrel grenadelauncher equivalent, much less a RPG or LAW/SMAW/B300.
See the exposed tank behind the missing tire/wheel in a Stryker having a bad day during a training session? Just in the right place to help burn the tires off too, before the external 5-gallon fuel cans, 4 to a side, are even considered.
