Ok so we all know that ariens makes it really difficult to match a after market belt to their blowers as you cannot find any specs for length width etc. My blower is a 921037 and the drive belt is a 07200717 this is the new # for the old 07200522. This belt according to ariens manual is supposed to be a 3L wrapped belt not a raw edge, but what they are selling is a raw edge belt. So I started looking for a wrapped belt .375 or 3/8 but could not find a cross that matched to the oem number. With the constant idler tension I can see that it should indeed have a wrapped belt not a raw edge. So upon further inspection I noticed that the traction drive sheave with the belt still on the machine was riding at the very bottom of the sheave (pulley) and when I measured the width of the pulley it is for a 1/2" belt and matches identical to the width of the auger drive pulley width that is a 17/32. The sheave on the crank for the traction drive is .375 wide or 3/8. So now I know why my belt is wearing at the bottom and taking chunks out of it. So has anyone else noticed this difference, I contacted the dealer and basically got an oh well! I tried to find out if any other Ariens with the AX motor had a top sheave that ran a 1/2" traction drive belt so that I could match both sheave widths of course he said he wouldnt know that. So has anyone noticed this and actually made the sheave change, if so what did you use.