InterMountain #40051 36" All-Brass Insulated Wheelsets (12 sets)

Nickel Silver Plated Brass Insulated Wheelsets These wheels follow NMRA RP-25 Standards. One wheel is insulated from the all-metal axle. The entire wheelset is non-magnetic. The axle length is approximately 1.006″ (+- .004″). 28″ wheels are used on modern Tri-Level Autoracks, some Bi-Level Autoracks, and some older intermodal cars such as Impack spine cars, front runners & four runners – check your prototype. 33″ wheels are used on 50 & 70 ton capacity cars (CAPY approximately 150,000 LBS or less). 36″ wheels are used on 100 ton capacity cars (CAPY approximately 200,000 LBS), and on all passenger cars no matter the era. 38″ wheels are used on 150 ton capacity cars, primarily the center connection trucks on modern intermodal cars with 33″ wheels at the coupler ends. Cabooses can use either 33″ or 36″ wheels depending on the prototype.