looks like you are on 6.50 x 16, I run on 7.50 x16 on LWB/Defender rims, if you go with 7.50,s (this is the way to go) your spedo will read 27 at 30 MPH so youse a satnav.
you can see the section of the 7.50 xcl,s if you go wider the stearing will get heavy