For riders who like the reduced darting feature of the original DoolyÖ and want a lighter, performance-based runner for responsive cornering Formed from one piece of steel Polaris '06-'12 IQ Trak Ski Runner Information: To replace stock runners, check for the number of bolts currently being used on your stock ski. If your stock ski comes with three or four bolts use Woody's 1225 runner series which has three bolts which will also fit the 4-bolt pattern. If your stock ski comes with six bolts, use two pair of Woody's 7125 runner series.. WEARBAR DOOLY S-J 4" AC