Recommended wheel size

I've just bought a 2009/59 Mazda 6 SL with the 185bhp 2.2-litre diesel engine. It has 18-inch alloys. The handbook specifies 16, 17, or 18-inch. Which is best - and why?

Asked on 14 December 2012 by westie

Answered by Honest John
16-inch will give the best ride because there is more tyre between the rims and the road. But 16-inch may not fit around the brakes. 17-inch is probably the best compromise.
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