I think I could use use a little more traction using the JBucket jr on my X530. I've got the HDAP Tires and 4 SC weights. I bought a spare set of used rear 12x12 wheels from the JD Dealership. I plan on mounting some Ag tires, weighted w/RimGuard. I haven't found any 24X12.0-12 Ag Tires so far, but Carlisle has two I've found a: 23X10.5-12 and a 26X12.0-12. I'm a little hisitant about the 26X12-12, because it might put too much strain on the transaxle. Where as the 23X10.5-12 would pull better, but would the 10.5 width fit? Anybody have an experience with this? If I could find a 24X12.00-12 Ag that would be great.