Wheel Design: B4 Multi-Piece Beadlock

3/32" tungsten carbide diff balls

1 assembled fuel tank

keeping your dampers rebuilt to factory spec

keeping wheel movement controlled and consistent

Kyosho UM574 Gear Box Set (Ultima SB) 1.9 Wheels Wheel Design: B4 Multi-Piece BeadlockKyosho UM574 Gear Box Set (Ultima SB) The Kyosho UM574 Gear Box Set (Ultima SB) is a genuine Kyosho replacement part for the Ultima SB, engineered to restore or upgrade your model to factory specifications. Genuine Kyosho parts are manufactured to precise tolerances, so fit, alignment, and performance stay true to the original design. Keeping your model stocked with authentic Kyosho components makes maintenance straightforward, reduces downtime