You spoke, Boom Racing listened! Introducing Boom Racing's all-new dual-staged 1.55" x 4.19" sized foam insert in soft open outer foam and hard closed inner foam.
Boom Racing releases all-new soft outer / hard inner dual stage foam inserts for 1.9x 4.75 and 4.45 crawler tires.
Boom Racing releases their latest dual stage open/closed cell foams for 1.9x4.45 (113mm) tires.
Boom Racing releases two 1.55 foam inserts for 3.74 and 4.19 tall crawler tires.