Athearn 25745 N Scale 4-6-6-4 Challenger w/Coal Tender UP 3997 DCC & Sound Roadname_Sounder - SDRX Athearn Genesis G65828 HO Scale

Athearn Genesis G65828 HO Scale EMD GP50 Ex Santa Fe BNSF 3200

and ranging in thickness from 1/64th of an inch to 1/4th of an inch

then the Badlands tires are the answer for you

45 in (37mm)

Treal Aluminum 7075 Rear Inner Portal Cover Housing and Portal Drive Axle Mounts (2) pcs for Traxxas TRX-4

Athearn 25745 N Scale 4-6-6-4 Challenger w/Coal Tender UP 3997 DCC & Sound Roadname_Sounder - SDRX Athearn Genesis G65828 HO ScaleAthearn 25745 N Scale 4 6 6 4 Challenger w Coal Tender UP 3997 DCC & Sound In the spring of 1941 UP locomotive designers began working on a locomotive to team up with the new 4 8 8 4 Big Boy's then under construction at Alco. The Big Boy's were designed to pull heavy freights up the Wasatch Range in Utah to the division point at Green River, WY. What was needed was a locomotive to take over at that point that could speed the freights eastward across