Boom Racing 1.9 Extra Wide Dual Stage Open (Soft) / Closed (Hard) Cell Foam Insert for 4.75in (110mm) RC Crawler Tires (2)

This is a set of Extra Wide cell foam inserts. They are made for Boom Racing’s extra wide ProBuild and KRAIT wheels.

Dual-stage foam inserts for 1.9×4.75″ (120mm tall) RC Crawler tires.

Soft outer foams help the tires conform to the surface. A firmer inner closed-cell improves sidehill performance and maintains a better sidewall structure. They are more durable and longer-lasting.

Softness:

Inner: Hard

Outer: Soft

Size:

Inner:

Overall diameter: 85.5mm

Inner diameter: 54.5mm

Width: 36.5mm

Outer:

Over diameter: 110mm

Width: 46.5mm

Includes:

2x Outer Open Insert for 4.75 Soft Compound

2x Extra Wide Closed Insert for 4.75 Hard Compound