Assuming they're 31x10.5x15R the tires will fit the rims very well and hold a bead if you air down to low psi offroad.
They WILL rub stock control arms at full lock unless you adjust your steering stops out or put spacers on.
You could also consider stock WJ Lower Control Arms which bolt up with a minor bushing modification. They have a bend in them to clear the tire when the steering is fully locked.
Buy aftermarket rims with 4" backspacing vs stock 5.25". You will clear your stock arms with that extra 1.25" offset.
'00 XJ Sport, White - almost done for now...
'11 Town and Country - people mover :-(
'88 XJ Up Country, '01 XJ Sport, '08 KK Limited, '98 XJ Parts Donor, '07 XK Limited (the Stall-ander)