Motor Adapters & Spacers
We stock adapters for 18mm motor mounts and up to 54mm. Browse this category, or narrow your selection by clicking one of the buttons below. PMR (positive motor retention) retainers are often used with larger friction-fit adapters.
 Adapters for 18mm to 24mm Mounts |
 Adapters for 29mm and larger Mounts |
 PMR Retainers |
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Engine Adapters Mini to Standard
Two simple steps transform a mini engine into a standard size. Insert a mini engine into the adapter, and insert the adapter into a rocket. 3...
Engine Adapters Standard to D
Two simple steps transform a standard engine into a D size. Insert a standard engine into the adapter, and insert the adapter into a rocket. 3...
Engine Adapters 24 mm to 29 mm
Adapts Estes 24 mm C11/D, Estes 24 mm E and Estes E30 series Composite engines to a 29 mm Estes casing size. 2 sets per package. Includes orange...
E to D Spacer. 2 Pack
These spacers allows you to place 24mm D size motor or casing into E-size motor tube. Works for Estes D and large C motors as well as to fit RMS-24...
29mm to 24mm Motor Adapter and F Spacer
This adapter will fit 24 mm engine into 29mm G motor mount. Also included is the spacer to properly hold F motor in the G motor mount.