I believe these are cast wheels.
3 Pairs Of New Slaters Ref:7125 3'7" Dia.Plain Disc. 7mm/O GAUGE Wheels
O Gauge Wheels - Plastic Wheel Disc Large Amount
SET OF 8X O GAUGE WHITE METAL KIT LOCO WHEELS LOCOMOTIVE WHEELS SPOKED TWIN HOLE
Rake of 3x O Gauge LMS 20T Hopper Wagon Mineral Truck Kit *WHEELS INCLUDED*
O Gauge HORNBY No. 1 Electric Locomotive Wheels with SQUARE BOSS
