These are the 1/8 scale Buggy Medium Inserts from AKA Racing.
FEATURES: The special closed-cell foam feels substantially stiffer than typical foam inserts
The firm foam provides the best support for the tire
Precision-cut with state of the art machinery
INCLUDES: Four Medium Compound Inserts
REQUIRES: Inserting in tires
SPECS: Diameter: 3.2" (81.3mm)
Width: 1.7"(42mm)