ARX-5R-4S True/Stretch-X Race Frame


Out of stock

SKU: arx-5r-4s-race-frame Category:


  1. Recommended Starting Point For PIDs:

Roll and Pitch: 25/20/7

Yaw: 28/21

Click Here for Assembly Instructions

Set of Spare Arms can be found Here

Specialized 4S 5″ race frame kit.

  • Based off the 202mph XLR-1 frame project (Guinness record acceptance still under review – review period takes a lot looooonger for poor people)
  • With 2600kv and APC 5150 props, capable of average speeds of 147mph (237kmh) on 4S and 163mph (262kmh) on 5s:
  • 5″ Converitble Frame:
    • Convert from true-x to stretch-x in about 1 minute (208mm MTM in true-x configuration, 204mm MTM in stretch-x configuration)
    • Convert to 6″ frame when 6″ arms become available
  • Designed for 4S (some 5S lipos can be squeezed in like the Tattu 1300 75C 5S)
  • Uses 2 o-rings as straps to hold in the battery and to hold the FPV camera mount in place
  • Protective braided mesh tubing included in the kit to protect FPV camera wires
  • Includes all aluminum hardware
  • 45g including hardware and o-ring battery straps
  • The stack has virtually unlimited room since it attaches to the bottom which also makes working on the stack easy
  • There is room between the center arm plates for a 20×20 FC or 20×20 4 in 1 ESC. windows are provided for USB/wiring access
  • Designed for 20mm wide FPV cameras, although spacers could be used to increase this distance
    • A Runcam Split will fit on here using the long camera cable, but in order for the Split camera to fit, you must put spacers on the FPV cam mount
    • A Runcam Mini Split won’t fit with the stock cable since it is too short. However, I was just informed that Runcam offers an extension for the mini (thanks to Jace for this info!).
  • Currently, only 16 x 16 motor mount pattern – I was not aware that some motors only have 19 x 19 mounting hole patterns so I will have to have some mounts made

The kit includes:

  • Carbon fiber frame
  • (4) M3 x 6 aluminum button head screws
  • (8) M3 x 12 aluminum button head screws
  • (4) M3 x 16 aluminum button head screws
  • (4) 4.5mm hex x 6mm M3 aluminum standoffs
  • (2) 4.5mm Hex x 20mm M3 aluminum standoffs
  • (4) M3 plastic washers
  • (4) o-ring battey straps
  • (10) 4″ zip ties
  • (2) 6″ long braided mesh tube
  • (1) 2″ long shrink tube

Additional information

Weight 44 g
Dimensions 100 x 230 x 6 mm
5" Race Frame



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