You're not supposed to put a snipe on them. LoL What is that wheel on? Odd bolt pattern.
John deere ag tractor. One set of bolt holes is for the adjustable wheel hubs. They have a wedge fit to the axle shaft allowing the farmer to change wheel spacing for different applications. The second set is for the wheel to hub mounting.
Edit: that is just the outer hub for the duals seen in the picture. The wheel with the duals is off.
Here is what the hub looks like
Why would a farmer want to change wheel spacing? One tractor for multiple tasks.
Years ago, we had a John Deere 7810 that we used to pull a 12 row planter, then a side dress applicator, and then pull the round baler in the summer. Also used for light tillage work, or backup on manure spreader. For the planter, we moved the inner tires closer to the frame to allow for duals to be mounted to the axle, and all tires were spaced to fall between planted rows. After planting, the duals were removed and we knifed in our side dress fertilizer with this tractor. Right after side dress, we slid the tires out to their widest setting, and reversed the front wheels side to side (offset wheels) to widen the tractor to straddle the wind row for making round bales of dry hay or straw. When the baling season was over, we would narrow the wheel spacing back to row crop settings for next spring and put the removable hubs for the duals back on the axles. With the dual hubs already mounted, the dual wheels go on pretty quick, so we left them off unless we really needed them during the winter. During a mild winter, they never went on until spring planting.
Today, we just have more tractors. One is set wide for the baler, two are set narrow for feed wagon, rest are set at row crop width, and they don't ever change.