New Bridgestone tires ride horribly!

If you wanted a softer riding tire you should have gone with something with a taller sidewall. I am unsure how you figured a wider tire was going to help.

tire is 4.5% wider hence has 4.5% more loadbearing area and hence needs about 4.5% less air - so now your at 2psi less. You say it rides pretty much same at 3psi less so that plus a stiffer compound is likely logical.

You should try a tire with a taller sidewall, although a 65 series sidewall is reasonable now days. Sounds like the suspension is just too stiff for your liking.
They do have a taller sidewall by a 1/4 inch. Not much, but thought it would help. 225/70/17 is non existent and a 245/65/17 is getting g into much heavier tires. Hence I went 235/65/17.
 
Every Bridgestone tire that I have experience with have all ridden harsh. The higher the mileage rating and added LRR make them a no go for me.
Stay away from Michelin Primacy Tour A/S. The Defender 2 is a good tire however, you will still experience some harshness.
Yokohama Avid Ascend LX might be a good fit.
Goodyear Assurance ComfortDrive is another good pick.
My experience with several sets of passenger and truck tires by Bridgestone has been exactly the same as @MParr. Harsh riding and poor traction in foul weather conditions. They actually seem to ride harder as they age...maybe due to a harder rubber compound closer to the belts/carcass? I will not willingly purchase Bridgestone tires again.
 
They do have a taller sidewall by a 1/4 inch. Not much, but thought it would help. 225/70/17 is non existent and a 245/65/17 is getting g into much heavier tires. Hence I went 235/65/17.
I'm looking at tires for my 17 CX-5. I am looking at the 245-65-17 as they are wider and taller sidwall. Mine rides fine on the Hankook tires, they just don't seem to last.
 
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A 235 series tire on a CX-5 is a decent amount of rubber. It’s got more rubber to put on the ground for the same pressure. I think the OP probably nailed it by dropping the air pressure. Otherwise it’s like running the 225 at close to 40, which would be harsh.

I used to pretty much exclusively buy Bridgestone. They can be comfortable, and depending on the model can be anywhere from OK to excellent in the rain. However, notable observations for me have been they do feel a little more connected to the road and tend to be high quality, maintain their shape, balance well, and are pretty sturdy. Good for sporty or more aggressive driving. Other brands may be a tad more comfortable.

I’ve had good experiences with non-oem Bridgestones.
 
I have a Milton dial gauge. Should be dead accurate.

Struts are Koni Special Active with like 5k on them. Ride comfort oriented strut.

Got new wheels too. Sparco Assetto that weight 7 lbs less than stock.

All this was to help ride comfort.

It rode ok with all of the above and the Geolanders.

It rides good at 31 psi with the Bridgestones. Bout the same as 34 with the Geolanders.

Lesson learned. Just leave it stock!
I would like to hear more on the Koni shocks. I've been eyeing them. Can you elaborate?
 
My 25 Cx30 came with Turanzas. They are fairly stiff but I run them at 40 psi as I do all my cars or SUVs. Still not even close to how rough riding the Mazda 3 was though.
 
Need more sidewall! 35s aired to 15 PSI off road - nice and soft. Run 30-35 on road and still soft. Have driven a few Mazda CX5s and would agree they are sportier (I personally liked that). Need a Cadillac brougham or something on an air suspension to have a soft but controlled ride.

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I have a Milton dial gauge. Should be dead accurate.

Struts are Koni Special Active with like 5k on them. Ride comfort oriented strut.

Got new wheels too. Sparco Assetto that weight 7 lbs less than stock.

All this was to help ride comfort.

It rode ok with all of the above and the Geolanders.

It rides good at 31 psi with the Bridgestones. Bout the same as 34 with the Geolanders.

Lesson learned. Just leave it stock!
Unfortunately you can't get a 225/70R17. Adding width is going to add a bit of NVH, all else equal.
Running them at 30-31 psi, or even a bit lower, is going to be fine.
Our Outback has 225/65R17 too, and it seems that there isn't and 16" narrower and higher profile tires to replace them either?
And 215/70R17's are very rare too, as I would prefer that size for winter.
 
Ok. I got some 235/65/17 Bridgestone Turanza Everdrive tires for my 2016 CX-5 in the hopes the little bit bigger tire would have some more cushioning since the roads here are atrocious. Stock size is 225/65/17.

Tire Racks reviews of the new Bridgestones are excellent. Supposed to be very comfortable over bumps, great in snow, best in group on ice beating all the AW tires. 80,000 mile tread warranty. Thought they’d be perfect!

Uh, anything over 30 psi and it’s like I’m rolling in Flintstone tires! Atrocious! Like lead filled baloons.

So I did some investigating, using online tire pressure calculators etc.

Since these tires are 104H rated at 44 psi max, while most other tires have a max of 51 at that load rating, coupled with the crazy high mileage warranty, does that mean these are just a super hard compound tire with stiff sidewalls?

None of this makes sense!

With the low max psi, all the online calculators and some hand calculated formulas indicate 30 psi. Door placard is 34 psi.

I’m stumped!
They are hard tires for the mileage.
 
I’ve got turanzas on my Altima and thus far have been as good as any tire I’ve ever owned. I’m on track to get 60k out of them, which for a low pro 19 tire is pretty respectable. 30k, still quiet and perfectly balanced with a tad over 7/32nds left.
 
Im genuinely curious why you bought new wheels that were still 17"? If you are looking for ride/comfort go down at least to 16" and get a 225/70R16. More sidewall and less wheel will always improve ride while sacrificing some handling. Ive gone with smaller wheels and seen a huge improvement in fuel economy and ride. Unsprung weight being the enemy as you already know.
 
Im genuinely curious why you bought new wheels that were still 17"? If you are looking for ride/comfort go down at least to 16" and get a 225/70R16. More sidewall and less wheel will always improve ride while sacrificing some handling. Ive gone with smaller wheels and seen a huge improvement in fuel economy and ride. Unsprung weight being the enemy as you already know.
I actually tried 16s and they rubbed on the very top of the steering knuckle! To get 16s to clear I’d have had to get like 30 offset wheels.
 
I would like to hear more on the Koni shocks. I've been eyeing them. Can you elaborate?
They’re the special active struts that have the valve that opens up on hard impacts to soften up, but stay stiffer in corners. Meh. They were ok when new but honestly after having so many different brands of aftermarket struts on cars, I’m always gonna stick to OEM. They just work the best. The Konis are alright. Better than blown out old ones. KYB are too stiff, Monroe’s were always too soft IMO.
 
Update after this fiasco….. Although I feel the Bridgestones are a bit on the firm side, I ended up getting the struts warrantied by the guy who installed them. Long story but it now has Monroe Quick struts. It then developed a clunk in the front end. Took it to 2 shops who both said the suspension was tight. Clunk turned into popping, banging and creaking when steering. I said f-it and had new control arms installed and new inner and outer tie rods. It rides great now. Firm but not harsh over bumps at 32 psi. Don’t wasn’t completely the tires.
 
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