They are ideal for replacing the plastic Peco/ Farish/ wheels on early wagons. The back to back of the rims is 7 mm. Check out the pictures.
N Gauge Wheels Ect
Peco NR-100 Disc Wheels On Axles 4 Axles (8 Wheels) N Gauge
PECO ACCESSORIES NR-101 SPOKED WHEELS ON AXLES (8 WHEELS) - N GAUGE
PECO NR-140 Disc wheels n/s tyres 40 axles N Gauge
n gauge metal wheels Ect
N Gauge Farish JPA Bogie Cement Wagon VTG Lafarge Cement NO WHEELS UNBOXED May23