If you can't find any definite info on the wheel set you have now , you may need to measure.
Here's a pretty good article on what is what.
Axle standards explained- Mtbr.com
There's a good chance you have mountainbike standard stuff eg 100mm front 135mm rear spacing and QR standard axles.
Measure anyway to know what you have , so you know what to look for.
Are you looking for more durability or lighter than stock?
This should get you started anyway.
Mick