Specifications:

• Anodized 6061 aluminum for high strength and low weight.
• The foam tire is held tightly by a custom locking washer, which must be pressed in and turned 90 degrees to release.
• The hex flange will allow you to keep driving even if the locking washer is destroyed.
• The hub is secured to the motor shaft by an 8-32 setscrew.
• Available with 3mm and 4mm shaft bore, but can be drilled out as big as 6.35mm (0.25in).

Weight:

• Thin size (0.50in wide) weighs 5.5g each.
• Wide size (0.75in wide) weighs 6.7g each.

 Requires:

• 5/64" hex wrench
• Foam wheels (FingerTech Foam Wheels, Lite Flites or Lectra Lites)
• FingerTech Twist Hub Key, needle nosed pliers, or print your own key! 

Note: Picture shows wheel and key for clarity.  Not included with hub purchase.