If you only want to carry one tool in your pocket when you're out having a blast, make it the RC Cross Wrench. It combines the four most important sizes (4, 5.5, 7, and 8 mm) into one compact tool, so you can quickly tighten loose wheels on the go.

What do the sizes fit?

  • 7.0 mm: The absolute must-have. It's the standard for wheel nuts on HyperGo, Tornado, and Hammer.
  • 5.5 mm: Standard size for the many M3 nuts on the chassis.
  • 4.0 mm: For the tiny M2 nuts around toe and camber links.
  • 8.0 mm: For M5 nuts and glow plugs if you're running a nitro car.