Why do drivers want 'sport' suspension and large wheels?

Our other car is a 2010 Mercedes-Benz C220CDI Estate Auto (CO2 emissions 154 g/km). It is brilliant. For the test drive, Mercedes-Benz produced a car with sport suspension and 19-inch wheels. I found that...

Why is our BMW X5 wearing through tyres so fast?

Our BMW X5 3.0sd SE, bought new in September 2008 on a HP agreement, wore its rear tyres through to the metal within four months. BMW accepted there was a fault with the alignment from the factory and...

Can I fit my BMW 320d Sport with 235/40 runflat tyres?

My BMW 320d Sport is of course fitted with runflat tyres as original equipment, 235/40 R18 on the front wheels and 255/35 R18 on the rears. I have just replaced the fronts with Michelin Pilot Sport runflats...

Would you recommend a BMW M Sport 3 Series or an Audi A5?

I have a budget of around £17,500 and I'm looking at the Audi A5 or BMW M Sport 3 Series coupe. Fuel economy and cost of insurance is important as well as looks. Which would you recommend?

Do large wheels with low profile tyres make SUVs like our Honda CR-V unacceptably expensive to run?

My wife and I drive a CR-V EX I-VTEC auto (our third such vehicle) that was purchased as a 3-month-old demo model in October 2008. However this model was fitted with 19-inch alloy wheels and low profile...

Will the Audi A6 S-line's 19-inch wheels cause an uncomfortable ride?

I inherited my current company car, an '09 plate Audi A6 S-line saloon running on 18-inch alloys and 40-profile tyres. I expected the suspension to be spine-smashingly hard, but have been pleasantly surprised...

How do different wheel sizes affect a car?

I am a recent convert to your Q&As in the Telegraph. I have, on several occasions noted you commenting on alternative wheel sizes for specific cars. What factors are affected by the wheel size of a car?

Would you recommend the Lexus RX400h as a particularly soft ride?

As a result of a domestic accident, my wife seriously feels pain every time I drive over a matchstick so I need a very, very soft ride for her. I have been offered a 2005 Lexus RX 400h SE CVT with 45,000...

Can I replace my Audi A6's low profile tyres with standard fittings?

I have just a purchased an Audi A6 Avant (08) 3.0 TDI quattro that has factory-fitted Michelin 255/35ZR19. Over 40mph, these tyres have a very obvious resonance which really is annoying. I'm not a great...

I need an estate car or tourer - should I pick the Mazda 6 or Citroen C5?

I am self-employed covering 30,000 miles per year, and need an estate car or tourer. I have had an Audi A4 and MG ZT as my last two cars, and am looking at the Mazda 6 2.2 TS and Citroen C5 VTR+Nav. Which...