What's the obsession with low-profile tyres? Why do car manufactures fit low-profile tyres as standard? My brother bought a new Jaguar, which was supplied thus, and he noticed the firmer ride. The tyres would transmit the sensation of running over a hayseed, let alone anything else. I bought a used Range Rover with low-profile tyres and they are completely useless unless you are travelling on a billiard-table surface. If I want to fit more suitable tyres, will I need different rims? The public is so universally into bling that car owners suffer terrible ride quality, tramlining, crashing over speed humps, burst tyres and wheel damage etc, just so they might look a bit like a footballer's wife/rap star. If you buy a car on wide, low-profile tyres, you will have to replace them frequently and expensively. It makes sense for tyre manufacturers to discount them heavily so that car companies fit them and generate repeat custom. Range Rovers, Range Rover Sports and Land Rover Discovery IVs are best on 19in Pirelli Scorpion ATRs or STRs, so if yours has 20in rims (or bigger) you will need a new set of wheels.