This Hop-Up Option is for use with the TD4 chassis. It replaces the fiberglass reinforced part used in the original kit. The aluminum component raises rigidity for highly responsive steering compared to the standard plastic component.

• TD4 Aluminum Crank Arm x1
• This precision, lightweight aluminum part boosts overall chassis rigidity and facilitates smooth handling.
• Tamiya blue anodized finish.
• Features built-in ball bearings.
• Compatible with TD4 chassis cars.