These are 3" Super Lite Wheels from Dubro.
FEATURES: Black impact-absorbing foam construction pre-mounted on
gray plastic 7 spoke rims.
Rib tread design.
INCLUDES: Two 3" Super Lite Pre-mounted Wheels
REQUIRES: Wheel collars to hold them on the axle.
May require reaming out the hole to mount on larger axle.
SPECS: Diameter: 3" OD
Diameter: .178" axle hole
Weight: 13.84 gr