@ Sarkaar:
They do work like normal wheels. All you need to make sure is that, you are driving in good conditions (both road & tyres). And usually, the show/lowered cars (as they appear in shows) are lower than, when you drive them normally on road. Normally, more than tires/rims, suspensions make them lower.
@ AbidSiddiqui:
Depends on 4X4/SUV you want to get hooked. Just consider the first pic & you´ll see, that Range Rover looks awesome with those low profile tyres...! But in very next pic you´ll notice that, Land Cruiser is not that much eye-catching with big wheels...!