It's not so much about the specific tire as the tire size. Less sidewall = less cushion, in general. Whether or not you can actually feel a difference is largely up to suspension tuning. 17s vs 20s on an otherwise stock VW GTI is very noticeable. The 20s have crisper turn-in at corners, but noticeably rougher ride over washboard-y pavement. No idea about the Ridgeline, as I haven't swapped wheels/tires.
And yet there is a lot more to it than just the sidewall profile, which is why we picked that Continental in particular, and wheels that combined with the lighter tires drop unsprung weight by 5 pounds per corner. Such a big drop in unsprung weight can and often does counter what otherwise would be the impact of shorter sidewalls. Here it seems to be about a push from my time behind the wheel so far, the sidewalls are shorter but the unsprung weight reduction has made the job of the suspension in controlling the jolts over potholes significantly easier, and the Continentals have comparatively soft sidewalls helping a well earned reputation for ride quality.
Will there be a production run of the upgraded calipers if all goes well?
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That is the plan. I always start with doing what I want on a project, and if it works out positively enough it may indeed go to production.
I have not weighed the factory cast iron calipers, but from unbolting them and supporting them by hand while still attached by the brake lines we know they are seriously HEAVY. Once we get them off the Ridgeline will do precise weight comparison with the planned upgraded 6 piston calipers, but I expect at least another five pounds per corner of unsprung weight reduction at the front end per corner. That reduction which will further help the suspension do it's job, giving both faster front end response and ride better too. And we hope to get a lot better brake modulation, particularly when towing (all the car magazines have the weak Ridgeline brakes as one of their few beefs ..and I agree).