they install with basic hand tools during routine driveline service

is engineered for the RC8B4's front driveline

Exterior Dimension: 21"W x 20"H x 13

Height: 74

with every part fitting exactly like the originals

Athearn ATHG4599 HO 100-Ton Roller Bearing Truck .088" Tread (2Pr) 5mm Pinion they install with basic handAthearn ATHG4599 HO 100 Ton Roller Bearing Truck . 088" Tread (2Pr) This genuine Athearn Genesis HO scale truck set features 100 ton roller bearing sideframes with . 088" tread wheels, with two pair included per package. It is a replacement part designed to deliver smooth, free rolling performance under freight cars. Scale: HO Type: 100 Ton roller bearing truck Tread: . 088" Quantity: 2 pair Genuine Athearn Genesis replacement part