Smooth rolling blackened metal wheels on all Bi-level cars with all-wheel electrical pickup

Offset twin hopper kit

The rail base width measurement is per NMRA specs of

Here is an Athearn 16722 HO Scale Union Pacific SD40-2 Diesel Locomotive w/DCC & Sound #1618

The Trainz SKU for this item is P11380934

Roco 476 1:87 Minitanks Fla Rak PZ Roland VariantsUnitPrice_number_38.40 Smooth rolling blackened metal wheelsThis is a Roco 476 1: 87 Fla Rak PZ Roland Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Roco Model Number: 476 MSRP: $19. 99 Scale Era: HO Scale Model Type: Vehicles The Trainz SKU for this item is P12504301. Trainz Product Id: 12504301