A solid CNC machined aluminium 40 tooth gear compatible with Lego Technic. Perfect for when you need gears that won't strip or break under large loads (RC cars, big MOC builds etc). They work perfectly with other Lego Technic gears and parts. Parts works like 3649 / 34432.
Use our unique fitting system for a tight secure fit.
Use our unique fitting system for a tight secure fit.