[R Bedell]

First, the 44C was NOT designed for the 1x8/9 Series. It was designed for the 82 Series, that had the 5/8" drive belt system.

The correct mower deck for the 1x8/9 series was the 44 mower deck. It came from the factory with the IH-59703-C2, to be used with the 3/8" Belt.

Then the Quietline Series arrived. They utilized an Electric PTO instead of the Mechanical PTO as seen on prior models. IH changed the size of the center pulley for the "44A" decks to accommodate the Elec PTO. That pulley was IH-126393-C1.

People have found that putting the IH-126393-C1 Pulley on the older version of the 44 deck, gave them faster "tip speed". Thus, the IH-126393-C1 has a smaller diameter than the IH-59703-C2 Pulley. People have labeled this as a "speed up" pulley, although IH Cub Cadet never did so.