I purchased an OEM rear CV axle for my 2007 Sportsman 500 EFI. The original OEM part number for the axle is 1332421. The part number has been superseded by part number 1332935 and that is the part number I purchased. However; I noticed that the diameter of the black round axle is much smaller than the original OEM axle with part number 1332421. Have anyone else noticed this? I am afraid to put the smaller diameter axle on the ATV. Any advice.

Below is a link to the OEM cv axle with part number 1332421. You can see how large the black round axle is.

Rear Drive Shaft 2007 Polaris Sportsman 500 EFI Fits Others 1332421 | eBay