Help for wheelz

The axles generally come in two sizes. 14mm and 10mm (3/8 in) You need to know what size drop outs you have on your frame
I don't know about the lengths though.

As for the rim walls

Single walled rims are the weakest and generally the cheapest. (if you actually do tricks, they bend )
Double walled rims are the average and are a safe bet.
Triple walled rims are the strongest. But all of this depends on the design blah blah blah

Im not in the position to reccomend any specific wheels, but Ive heard bad things about the cinema 333
cheers

Thks a lot

Posting your frame make/model/year and budget will help you get a better answer. Because we don't know shit either. What good is a tree V3 with a g-sport ribcage if it doesn't fit on your frame and you don't have $400 for a rear wheel?

More info please