Overview Product Description PTM6124 4.00" Hardbody chassis (3.750" - 4.250") 3/32 front axle, 1/8" rear axle. Product Videos Custom Field Product Reviews Write a Review Write a Review × PROTRACK 4" HARDBODY CHASSIS W/ 3/32 FRONT AXLE PTM6124 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *