Pro-Line 6479-00 Rock-Tek Tires Weight System for 1.9" Crawler Wheels Monster Truck XL Parts so there's no extra hardware

so there's no extra hardware or modification required

with the MP777 front position also covered per dealer listings

Powerhobby 1/10 Touring Car Aluminum Wheels Black (4) 12mm Hex

Powerhobby Aluminum Gearbox w/ Differential – Arrma 3S Typhon / Senton / Vorteks

multiple height

Pro-Line 6479-00 Rock-Tek Tires Weight System for 1.9" Crawler Wheels Monster Truck XL Parts so there's no extra hardwareRock Tek 1. 9" Magnetic Tire Weight System for 1. 9" Crawler Wheels (2) Take your rock crawler's performance to the next level with the pro line Rock Tek Tire Weight System. Unlike traditional brass wheel weights that spin with the tire and increase rotating mass, the Rock Tek system utilizes a revolutionary magnetically stabilized, bearing supported design that keeps the weight positioned at the bottom of the tire for maximum center of gravity