Hey, I found this on the internet
JEEP
YEAR MODEL BOLT PATTERN LUG NUT SIZE
84-02 XJ 5 on 4.5 in. 1/2
97-04 TJ 5 on 4.5 in. 1/2
87-96 YJ 5 on 4.5 in. 1/2
02-04 LIBERTY 5 on 4.5 in. 1/2
92-98 ZJ GRAND CHEROKEE 5 on 4.5 in. 1/2
99-04 WJ GRAND CHEROKEE 5 on 5 in. 1/2
46-86 ALL CJ'S 5 on 5.5 in. 1/2
74-83 J-10 SERIES 6 on 5.5 in. 7/16
ALL J-20 SERIES 8 on 6.5 in. 9/16
74-83 F/S CHEROKEE 6 on 5.5 in. 7/16
Here's the link.
http://www.stagewest4x4.com/store2/store/pops/bolt-pattern.htmIt looks like the wheels I have will fit your ZJ. Both the TJ and the ZJ use 5 on 4.5
Hope this helps.
Robert