dont buy the ones from lowes either! They were terrible. The trimmers spun around so much as i was going down the road. it almost damaged the throttle trigger on one of them.
I got a rack from my local Ag Supply retailer and they work great for only like $120.
Dont be fooled by lowes $75 racks. Theyre horrible.
My set up:
-2007 Chevy 2500hd 8.1l 4x4
-7x18 enclosed trailer
-Grasshopper front mount 61", gravely 52"
-36" Gravely Walkbehind, 21" exmark push mower