2-stage foams for 4.19" RC crawler tires. They are two stage foams, outside is open cell and inside is closed memory cell. These are stock foams for the 1.9 HUSTLER 4.19 tire.
Specification:
Outer Firmness: Medium
Inner Firmness: Medium
Size:
Open foam: 103.0mm x 36.5mm
Close foam: 74.0mm x 29.5mm
Includes:
2x 4.19" 2-Stage Foam
Package total weight: 30.00 grams (incl. packaging)
Package size: 11.00 x 21.00 x 8.00cm
Factory description: Boom Racing 1.9 Dual Stage with Open and Close Cell Foam for 4.19 (108mm) RC Crawler Tires (1 Pair)