Pit Bull RC Growler AT/Extra Scale R/C 1.9 w/ 2 Stage Foam (2) Komp Kompound - the only compound we are using on these bad boys. They seem to get better and better as they break in... and you can use them for your daily hobby time as well as competition... RIGHT OUTTA DA BOX!!!! Multi-varied Unique Tread Blocks - our designs are not just about looks...they serve a purpose with their multiple varied lugs, edges and sipes. These help to maximize traction especially in off-camber situations. Inside ribbing - provides sidewall support and stability. Thicker Beads - provide more meat for Beadlocks to bite on. Integrated Sidewall Protectors - sidewall bands of rubber that add support and control.