These are Lightweight Treaded Wheels by Du-Bro.
FEATURES
Lighweight
Shock Absorbing
Fits inside most Wheels Pans and Retracts
Grey Eight Spoke Hub Design
INCLUDES
Two Wheels
REQUIREMENTS
Nothing
SPECIFICATIONS
Diameter: 45 mm (1.75")
Hub Diameter: 3 mm (0.125")
Width: 16.25 mm (.640")
0-DUB175TL