Ummagawd Botgrinder Grinderino 3.5-inch Freestyle Frame

  • $44.95
    Unit price per 


** Updated - Now compatible with 9x9mm motor mounting **

Introducing the Grinderino.

If you love your Demibot, but wish you had one that's just a little smaller, your wishes have been granted!

When Botgrinder asked if we can make him a 3.5" frame, he said he wants something just as good as the Demibot but in a smaller package. It took a bit of adjustment, but I think we hit the mark. As for flight controllers, this frame will fit a single board whoop style AIO or a 20 x 20 stack. The rear of the frame provides plenty of space to fit a VTX of your choice, and just the same, the front will accommodate any camera. We've provided motor mounting holes to fit our Ummagawd Aerolite 1605 3600kv motors, as well as a standard mounting pattern for any other motors you might like to run.

And if you were curious... Yes, this is less than 250g all up weight!


  • Arms: 4mm
  • Top Plate: 2mm
  • Bottom Plate: 2mm
  • Mid Plate: 2mm
  • Standoffs: 6mm OD 7075 Aluminum
  • FC Mounting: 20x20 and 25.5x25.5 (whoop style)
  • VTX Mounting: 20x20 and 25.5x25.5 (whoop style)
  • Frame Weight: 65g
  • Motor Mounting Pattern: 12mm x 12mm

1x Top Plate
1x Bottom Plate
1x Mid Plate (with press nuts)
2x Arms
1x Hardware Kit
1x Ummagawd Battery Pad
2x Battery Straps
1x Set of TPU FPV Camera Mounts

Download Assembly Guide

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