HEMISTORM MAXHEX BRAKE HEX HPI 5B Hemistorm's MaxHex The MaxHex is a new style brake hex. The MaxHex is machined from 7075 grade aluminium, and has two machined on rings. The bigger ring will keep the discs from falling off at the transmission side, a wider hex surface (+2mm) will ensure the discs don't get locked between the hex and the gearplate. The smaller ring fits against the gearplate bearing, providing a nice seal. When running a stock gearplate the seal is complete, when you're running a Turtle racing gearplate the MaxHex still enables the use of the bearing retaining screw Turtle provides with their gearplate. Installation is straight forward and done in a matter of minutes. Note: Will NOT fit with HPI part # 87559 HD Aluminum Spur Gear Mount.