Hello, replacing bearings and wheels in rear skid on my viper, and was wondering if anyone knows if the large wheels in the top/middle of the rear skid are the same as the large rear wheels? Reason I ask, is you can not change out the bearings and have to buy new wheels, but they want $80 per wheel. Was wondering if the rear wheels are the same bearing and wheel size. Since you can get those for $22 a piece. Help! Thanks