I ordered a set of 4 pcs wheel spacers online for my 2017 Honda Rancher 420 4x4. Got spacers in today,they don't fit my wheels.The wheels don't fit over the rim that is sticking up inside lug nuts. Is there any way to make it fit ? Any advice ? Thank you.
The measurement that you need to be looking at is the center bore size of the wheels, the hub, and the spacers.
The first thing I would do is look at the wheels themselves. If they are aftermarket often they will have a larger bore with the idea that you will need to use hub centric rings to make things fit. The wheels I use for snow tires are like this and the hub centric rings have stuck to the wheels, if this is your situation you might just be able to take the rings out of the wheels and be good.
If that is not the case you will need to get the correct wheel spacers. Measure the center bore on both the wheels you want to use and then order the correct ones. If they are too small at the wheel interface you can always add hub centric rings to even things out.
In all of these cases be aware that all of this is increasing the forces the hub will need to handle while cornering, so just give your suspension a little bit of extra love and attention when doing maintenance.
If they were ordered legitimately from a reputable company, there shouldn't be any issue in returning them for spacers that fit your hub diameter and center (unless you have aftermarket rims in which case you may need to take measurements and have custom spacers made).
If you're only looking for a way to modify the spacers you now have, I'd question the legitimacy of how you "acquired" them.