SRC Terrain Crusher (Bronze) for 17mm hex / E-REVO (Pair) Terrain Crusher (Bronze): For Offroad / Dirt Use (High-Speed) 5.5" diameter, 3" width MONSTER SIZE wheels for your E-REVO / REVO Belted tires (no ballooning) along with SRC's signature inner foam to maximize surface grip Pre-glued / pre-assembled (Packaged in pair) Fits all Revo series (17mm hex hub) AND fits all 17mm hex hub for other models