DOSSIER · UNCLASSIFIED · OPERATIONS
SECTION 10 // ARMOR / VEHICLE PROFILEREF · ST-66
ST-66
VIIIPremium

ST-66

USSRUSSR·Medium TankMedium Tank·MT assault

Blueprints for the NST (noviy sredniy tank or new medium tank) were completed in 1966. One distinctive feature of the vehicle was its four-loop chassis with a drive for each loop. The transmission allowed the amount of power transferred to each track loop to be regulated. The project remained in blueprints.

Health
1,300
DPM
2,195
View range
370m
Speed
50km/h
Camo
49Average
Mark of Excellence requirementsCombined dmg + assist · NA · 2026-08-27
3 marks of excellence
3 marks · 95%
3,335
2 marks of excellence
2 marks · 85%
2,501
1 mark of excellence
1 mark · 65%
1,732
A-01 · ARMOR SCHEMA

Armor thicknessMeasured

Nominal plate thickness straight from the game client. Click any plate to highlight it on the 3D model and focus the camera on it.

Armor
20mm
250mm

Hull

All 12 plates

Turret

All 22 plates
A-02 · SPECIFICATIONS

Specifications

Builds
Grade
Experimental
CrewShared perks
Field mods
Lv 0/6
Weaponry
DPM
2,195
Damage
300
Penetration
217 mm
… at 500m
195 mm
Reload time
8.20 s
Rate of fire
7.32/min
Aim time
1.90 s
Dispersion
0.370 m
… moving
0.220
… tank traverse
0.220
… turret traverse
0.100
… after firing
4.0
Damage vs. modules
135
Caliber
100.0 mm
Shell velocity
1,180 m/s
Max range
720 m
Ammo capacity
40
Potential damage
12,000
Shell cost
552 cr
Mobility
Top speed
50 km/h
Reverse speed
16 km/h
Power/weight
18.00 hp/t
Tank traverse
40.0 °/s
Turret traverse
35.0 °/s
Effective top speed
… hard
50.0 km/h
… medium
48.0 km/h
… soft
36.0 km/h
Effective traverse
… hard
40.0 °/s
… medium
34.7 °/s
… soft
26.0 °/s
Gun elevation
15 °
Gun depression
6 °
Gun traverse range
360°
Terrain resistance
… hard
1.30
… medium
1.50
… soft
2.00
Everything Else
Hull armor
120 / 60 / 45
Turret armor
250 / 100 / 60
Health
1,300
Engine health
275
… repaired
138
Track health
220
… repaired
165
… repair time
6.67 s
Ammo rack health
210
… repaired
158
Fuel tank health
175
… repaired
70
Total weight
40,000 kg
Stationary camo
11.80 / 4.18%
Moving camo
8.85 / 3.13%
View range
370 m
Fire chance
15%
Gun Constraints

360° traverse

Crew
  • CommanderRadio Operator
  • Gunner
  • Driver
  • Loader
A-03 · SERVER PERFORMANCE

Server performance

Aggregate stats from NA players over the last 30d

Avg WN8
1399
Good
Avg WNX
1232
good
Win rate
50.0%
Below Average
DPG
1201
Frags
0.65
Spots
1.06
Survival
21.2%
Dmg taken
1188
Hit rate
68.2%
Spot assist
350
Track assist
20
Defense
0.21
Avg XP
746

Aggregated from 153 tracked NA players · 372 battles. Coverage grows as more players are tracked.

MoE thresholds (combined dmg + assist)
65%1,732
85%2,501
95%3,335

Reach these combined damage (dealt + assist) values over a rolling window to earn marks of excellence.

Performance over time

Daily NA 30-day aggregates — how this tank trends as patches and meta shift

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Population spread

How NA players actually perform in this tank (30-day window)

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A-04 · TOP OPERATORS

Top players

Highest performers in the ST-66 on NA

  1. #1Crusader_Lawyer163 battles2,007
  2. #2SrA_Mikhailov212 battles1,737
  3. #3LethalSeraphim554 battles1,580
  4. #4sgtxjosue147 battles1,500
  5. #5Xumos136 battles1,350
  6. #6Blitz8_8143 battles1,179
  7. #7Zoidin_CA165 battles1,154
  8. #8Demoo257 battles1,144
  9. #9M_Labatt127 battles1,043
  10. #10grzy_azn_wrktm155 battles1,035
A-05 · VIDEO INTEL

Video reviews

Curated reviews, replays, and guides from veteran players

A-06 · SIMILAR HULLS

Similar tanks

Closest matches by stat profile — pick the ones that fit your playstyle.

A-07 · CHANGELOG

Balance changelog

What changed for this tank between game versions

No tracked balance changes

When this tank gets buffed or nerfed in a patch, the change shows up here.

The full USSR tech tree