Rocket Motors by Diameter
Find motors that fit your rocket. Select your motor mount diameter to browse certified motors, thrust curves, and full specs.
Ø 6mm
– class
Micro motors for Quest Micro Maxx and similar indoor/micro rockets.
Ø 10.5mm
– class
4 certified motors.
Ø 13mm
– class
Sub-miniature 1/2A–A class for small sport rockets.
Ø 18mm
– class
The most common model rocket diameter. A through C class motors from Estes, AeroTech, Quest.
Ø 20mm
– class
2 certified motors.
Ø 24mm
– class
Mid-power standard. C through F class. Common upgrade from 18mm.
Ø 29mm
– class
Entry-level high power. F through I class. AeroTech, Cesaroni, Loki.
Ø 32mm
– class
4 certified motors.
Ø 38mm
– class
Mid-to-high power. G through J class. AeroTech RMS, Cesaroni Pro38.
Ø 54mm
– class
High power standard. I through K class. Popular for Level 1 and Level 2 HPR.
Ø 64mm
– class
5 certified motors.
Ø 75mm
– class
Advanced high power. J through M class. Cesaroni Pro75, AeroTech.
Ø 76mm
– class
35 certified motors.
Ø 81mm
– class
1 certified motors.
Ø 98mm
– class
Extreme high power. K through N class. Cesaroni Pro98, AeroTech.
Ø 132mm
– class
1 certified motors.
Ø 152mm
– class
6 certified motors.
Ø 161mm
– class
5 certified motors.
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