This is the Traxxas Talon Tires with Foam Inserts.
Used on the Traxxas Revo
FEATURES: Soft compound treaded rubber, low profile design
INCLUDES: Two Traxxas Talon Tires with two Foam Inserts
REQUIRES: Installing foam inserts and gluing tires to wheels
SPECS: Width: 3.25" (83mm)
Outer Diameter: 5.6" (143mm)
Inner Diameter: 3.8" (96mm)