Are these carrier wheels ?

[colin jones]

The outside pictures are carrier wheels but the centre picture is too far away.
Colin.

[aj.lec]

Thanks
There was about 7 on this machine all similar style

[Bob McNeill]

the trommells on the 3 mile camp used to have bren track around the outside with the wheels as pictured, around ten bren carriers had been cut up, some parts behind the shearing shed on the 7 mile. somewhere I,ve got some pics taken early 70,s.