See: T-Work’s

T-Work’s have introduced front and rear brass carrier weights for the Kyosho Inferno MP9 TKI4. These outboard type weights are secured to the rear hub and knuckles with a set screw and add 5g, 10g or 15g of unsprung weight to the outer end of each suspension arm. These weights will help improve overall handling and steering response. The brass brass front knuckle and rear hub weight are available as pair or as set.