Overview Reviews Product Description RJ6-17 Challenger Wheel Assembly, RJ6 Rolling Jack. This wheel is 13mm; if you need a 16mm wheel assembly, please see part # RJ6-17CH. Product Videos Custom Field Product Reviews Write a Review Write a Review × Challenger RJ6-17 Challenger 13mm Wheel Assembly, RJ6 Rolling Jack Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *