but remember bigger tyres, means:
More rotating mass,
Brakes need to be in good condition,
Steering lock is more limited,
Gearing is seriously affected,
Bodywork mods,
Bumpstop mods,
In some cases bumper mods,
The list is quite long.
Pros and cons bigger tyres do give lots of room under your diffs. Which always helps. But if you go too big can bring other problems. I think 900x16 Is the limit for me on rover axles any bigger and its stronger portals with diff locks. Even LR had different gear ratio gearboxes that are mega expensive for 1 tons. perfect for a trials motor. Jai