![](http://worldgolftour.com/_images/sysmessage_nike_rzn.jpg)
Nike Golf has upgraded their 20XI golf balls for 2013 with a new RZN core, now available now for top players on World Golf Tour.
The new Nike RZN balls provide similar distance and short game control, but with a slower WGT swing meter to help you "ding" more shots, available in the following models...