I'm really struggling to find an off road wheel and tyre combination for my '99 Series 2. I've got 18 inch alloys on at the moment with on road wrangler tyres. I need something more suitable to occassional off road use - I'm happy to take them off and put the wranglers back on for on road use i.e. I dont expect to keep the off road wheels and tyres on for any great length of time. Can anyone help?

Cheers

Paul