Is it advisable to have my tyres below the recommended PSI?

I've just taken the plunge and bought 4 Michelin Cross Climates for my 2011 Mercedes E250 CDI Estate.Tyre size is 225/55 R16 99W. Mercedes Benz recommends 38PSI all round unladen, more when 5 up with luggage. I see that you regularly suggest running at lower pressures would you recommend the same for me and, if so, how is it likely to affect tyre wear as Mercedes suggested pressures would indicate I'd be running expensive tyres under-inflated?

Asked on 3 May 2017 by Lee1477

Answered by Honest John
I ran 215/55 R17s at 31PSI cold pressures all round in a Honda HR-V. Excellent comfort. Low noise. Good steering feel. No adverse effects of economy or wear. Probably not as low as that in the heavier E250 CDI, but cold pressures of 35 all round should be okay. As soon as they heat up they'll be 38 anyway.
Similar questions
I have read with interest your recommendation that tyre pressures be dropped by 3psi for comfort. Yet I remember when you recommended that for long distance, high speed, well loaded travel in a hot climate...
As recommended by you, I have just fitted Michelin Cross Climates to my 2013 Mercedes C220 CDI. The garage set them at 32PSI, but the car spec states 36PSI. What do you recommend?
My Mazda MX-5 is covered for the winter and wired to my battery charger, so I cannot move it. The tyres are Bridgestone Portenza 205-45R17 84W CKC4509. What is the safest maximum I can inflate them to...
Related models
Huge and useful boot space. Well-built and solid interior. Comfortable long distance cruiser. Excellent diesels. Very refined.


Value my car