Radio Shack XMODS 1/28 Wide Track Upgrade Set of 14 Bearings 6 Wide Bearings Rubber Sealed and 8 Metal Shielded High Quality Complete set of 14 Ball Bearings for Radio Shack XMODS 1/28 Wide Track Upgrade, Set Contains Total of 14 Bearings. 6 Wide Bearings with Rubber Sealed and 8 metal shielded bearings, the wide bearings goes in 6 locations, 4 in the inner and outer front wheels and 2 in the outer rear axles. This upgrade will cancel any side to side play. will make your Xmod more stable.