Will fitting smaller wheels to my car improve ride quality?

I have a Mercedes-Benz ML-Class, with Airmatic suspension. The car is on 21-inch wheels at the moment. Would it make a big difference to the ride if I fitted 19-inch wheels?

Asked on 25 November 2017 by glyn

Answered by Honest John
A huge difference to low speed ride quality over sharp imperfections in the road surface simply because a deeper profile tyre at the right pressure will absorb more of them. Will also improve tyre life, make tyres and wheels less susceptible to damage and make the tyres cheaper to replace. There is absolutely no point in 21-inch wheels except to appeal to people who think they look good, especially on an ML.
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