The Pe-2 had an internal capacity for six 100 kg bombs, for a total of 600 kg; this was no better than that of the older Tupolev SB bomber. The internal capacity consisted of a fuselage bomb bay capable of carrying four 100 kg bombs or an additional fuel tank, with two small internal bomb bays in the rear of the engine nacelles for a single 100 kg bomb each. This was supplemented by four external underwing racks. These were capable of carrying four 100 kg or 250 kg bombs, or two 500 kg bombs in overload configuration, giving a maximum bombload of 1,000 kg. Only the bombs in the external racks could be used in a dive-bombing attack; the internally carried bombs had no dive release gear and could not be dropped in a steep dive.