|Engine Power (hp)||520|
|Speed Limit (km/h)||60|
|Standard Shell Penetration (mm)||80 - 133|
|Standard Shell Damage||120 - 200|
|Rate of Fire (rounds/min)||9.0|
A lightweight version of the T20 medium tank with the M7 elongated chassis. The vehicle was developed in the first half of 1943. Unlike the T20 tank, the T21 featured reduced armor and lightened armament. The vehicle never entered mass production nor saw service.