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Botgrinder Grinderino mini Freestyle Frame (3.5"/5")

Original price $0.00 - Original price $0.00
Original price $0.00
$44.95 - $45.49
Current price $44.95
in stock, ready to be shipped
in stock, ready to be shipped

UPDATE: 5" arms now an option!


7/11/24: Thanks to a loyal customer we'll call JKS, we tinkered with how the grinderino would fly on 5" motors/props. Long story short, we loved it, Botgrinder loved it, and here we are. Now you can choose a grinderino in 5"! 

Introducing the Grinderino.

If you love your Demibot, but wish you had one that's juuuust 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 and 9mm x 9mm


Frame Kit Includes:

  • 1x Top Plate
  • 4x Arms
  • 1x  Bottom Plate
  • 1x Mid Plate (with press nuts)
  • 1x Hardware Kit
  • 1x Ummagrip Battery Pad
  • 2x Battery Straps
  • 1x Set of TPU FPV Camera Mounts


Grinderino Assembly Guide