Big wheels with very low profile tyres give a bling look to a car that some people find fashionable, but offer poor ride quality, suffer high wear rates are expensive to replace and are prone to damage. Smaller wheels with deeper profile tyres give better ride quality. The optimum sizes for a normal family hatchback are 195/65 R15 or 205/55 R16. However, 4x4s generally have bigger wheel sizes and altogether bigger tyres. If these are 70 profile or more they absorb rough tracks but make the vehicle’s steering very vague on surfaced roads. Going up a few wheel sizes and coming down to 55 profile tyres can cure this and, for example, a Mazda CX-5 on 225/55 R19 tyres handles astonishingly well for an SUV. Basically, 55 profile is the figure to remember. Best not go lower.