Rubber soft mount grommets at $2.99 for 10 pieces sit between your flight controller and the frame. They stop motor vibration before it reaches the gyro. The F722 Mini flight controller at $53.47 mounts on a 20×20 pattern and runs 3 to 6S. Fit M2 or M3 grommets to match your board holes, then check the gyro noise in Betaflight.
Why soft mount a flight controller?
Motors shake the frame, and that vibration reaches the gyro on the flight controller.
Rubber grommets sit between the board and the frame, so they soak up vibration before it reaches the gyro.
Clean gyro data means steadier flight, so a $2.99 pack of grommets is cheap insurance.
M2 or M3 grommets?
Match the grommet size to the mounting holes on your flight controller board.
The pack covers M2 and M3 sizes, with heights of 5.6, 6.6, and 8 mm across the options.
The listing offers 13 size and color options, so pick the size and height for your board.
How many grommets does a board need?
A board mounts on 4 grommets, one at each corner of the 20×20 mm mounting pattern.
A 10-piece pack covers two boards with 2 spares left over.
Keep spares in the kit, because a torn grommet lets vibration straight through.
Which flight controller pairs with them?
The F722 Mini flight controller at $53.47 mounts on a 20×20 pattern and runs 3 to 6S.
It carries an ICM42688 gyro, which reads clean data when the board sits on soft mounts.
The listing states flight controller only, so add an ESC when you build with it.
What did we check on the bench?
We counted 13 size and color options on the grommet listing, across M2 and M3 sizes.
We matched the 10-piece count and the F3, F4, and F7 fitment to the listing.
We matched the 20×20 mount, 3 to 6S range, and ICM42688 gyro to the F722 Mini listing.
Quick comparison
| Size | Heights | Colors | Pieces | Price |
|---|---|---|---|---|
| M2 grommets | H5.6, H6.6 | Red, blue, black | 10 | $2.99 |
| M3 grommets | H6.6, H8 | Yellow, red, blue, black | 10 | $2.99 |
Steps
- Remove the flight controller screws and lift the board.
- Push a grommet into each mounting hole.
- Set the board back on the frame over the grommets.
- Refit the screws snug, and do not crush the rubber.
- Check the gyro noise in Betaflight before you fly.
Frequently asked questions
Do soft mounts fit every flight controller?
No. They fit F3, F4, and F7 boards with M2 or M3 mounting holes. Check your board holes before you order.
How tight should the screws be?
Snug only. Crushed rubber stops damping vibration, so stop when the grommet holds its shape.
Can I reuse old grommets?
Check them first. A torn or flat grommet lets vibration through, so replace any that lost their shape.
Does the F722 Mini include an ESC?
No. The $53.47 listing is the flight controller only. Add an ESC, or buy the stack version with a 55A ESC.
Parts used
M2/M3 Rubber Flight Controller Soft Mount Grommets, 10 Pieces, $2.99
F722 Mini Flight Controller Only, 20×20, 3-6S, $53.47
F722 Mini Flight Controller Stack with 55A 4-in-1 ESC, 20×20, 3-6S, $87.71
Taker F722 BT Flight Controller with 45A 4in1 ESC, $164.99
Related buying guides on Quality RC Parts
How to Soft Mount a Flight Controller with Rubber Grommets
4-in-1 vs Single ESCs: Which Fits Your FPV Build?
BLHeli_S vs BLHeli_32: Which ESC Firmware for FPV?
Browse all the guides on the Quality RC Parts Drone Guides hub, or start at the Quality RC Parts store.
Sources
Quality RC Parts stocks parts in New York, USA and ships in-stock orders in 1-2 business days.
Last updated: 2026-11-11.