The truth is its the low profile tyres that are giving you the harsh ride, you can try adjusting the pressures and trying different makes of tyre, but unless the tyre you are running has an especially harsh ride, its unlikely to make a big difference (im not a big fan of Michelins, they can be noisy and sometimes a little harsh)
Ultimately you need to get a tyre with a taller sidewall (higher profile) this means fitting a higher profile tyre to your existing wheels (215-55-17s will fit) this will give you a slightly higher gearing 1.75% the
the 55 - series sidewall will give you a better ride than the 50, coupled with a less harsh tyre and careful choice of pressures could transform the cars' ride
Alternatively you could fit 16" wheels and fit 225-55-16s (the closest to 225-50-17 - -0.44%) or 215-60-16s, that would give you an even better ride - the higher profile tyres making the cercumference similar
I rate goodyear tyres over michelins and the goodyear efficient grip performance is a quiet, comfortable tyre
(reconed to be quieter, better ride and better wet grip than the Michelins)
Thanks FOCA for the detailed reply,
Looking at Ford's official stats, the only tyre size recommended for the 17 inch wheels are 225/50, So I'm a bit nervous about trialling 215/55 on them, also not sure will be covered by insurance incase of any accident if used not the recommended tyre size. I am sure changing down to 16 inch wheels and using the 215/60 tyres would greatly improve ride, but just pondering the cost of getting a set of 4 16 inch wheels and new tyres.
I might try other makes which are a bit quiet and comfortable than the michellins first, when time comes to replace the current ones. Which model of Goodyear tyre did you mention which were a bit quieter and comfortable, thanks.
Hello again, i think for you, goodyear efficient grip performance -
Goodyear also produce eagle F1 tyres, that are exellent performance tyres, but the efficient grip performance is quieter/ more comfortable/ economical so would be more suitable for you
I have tried Michelins, Continentals, and other makes and have found the goodyears (definately quieter and better grip than the Michelins, the Michelins i had did not seem to wear evenly, either but that may not have been the tyres' fault) to be all-round better, (in my experience) i use vredstiens in the winter
I used to drive a Mondeo mk3 titanium x 2.2 155PS (similar to an ST-TDCI) it had 18" low profile wheels on it, they had only slightly better grip than the 16" 205-55-16" (and you had to drive VERY hard to notice the difference) tyres i use on my ( more powerful than the 2.2) "souped up" 2.0L Mondeo i drive now, but the 18" low profile tyres/ wheels had a MUCH harsher ride than the 16" (205-55-16) wheels/ tyres, the 16" wheels & tyres weigh 17.4kgs and the 17"/18" wheels/ tyres can weigh upto 22kgs, each,(18.4kgs difference with 4 wheels/ tyres) which makes a big difference to performance/ economy (the wheels have to be "spun up" and are not a "static" weight)- so much so Ford produced 2 sets of economy figures for the Mondeo mk3, depending on the wheel/ tyre size