Did you count the pulley wheels in the washing machine & tumble dryer?
Then there's the wheels in the lathe and the pillar drill and on the trolley jack and the sack barrow...... we could go down a rabbit hole with this one.....
"Y mae dafad ddu ym mhob praidd" 1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10