As I wrote in past posts, formally, these changes should be implemented with the upcoming 1.22 patch, but the exact release date is still unknown.
4th list of changes, these time are regular vehicles, all level 10 [NERF and BUFF]: Object 268 Variant 4, ST-II, Vz. 55, WZ-113G FT
Object 268 Variant 4 – nerfed
• Chassis turning speed: from 22 to 25 deg/s
• Maximum forward speed: from 50 to 40 km/h
• Specific power: from 18 hp/t to 16 hp/t
• Durability : from 2,000 to 1,900 units.
• Reservation of the rangefinder cover: from 230 to 210 mm
ST-II – buffed
• Turret rotation speed: from 16 to 23 deg/s
• Reservation of the frontal part of the turret (turret + mantlet): from 320 to 350 mm
• Time between shots: from 5 to 4 s
• Gun reload time: from 11.7 to 11.2 s
Vz. 55 – nerfed
• Time between shots: from 2 to 2.5 s
• Gun reload time: from 22 to 25 s
• Aiming time: from 2.7 to 3 s
WZ-113G FT – buffed
• Specific power: from 11.8 hp. /t by 15 hp/t
• Maximum forward speed: from 38 to 40 km/h
• Base projectile speed: from 760 to 960 m/s
• Reload time: from 17 to 16.5 s
• Spread by 100 m: from 0.38 to 0.36 m
source – wotexpress