My 2010 Accord has 225/50 17 tires. Those low profile tires ride hard. According to a tire chart my tires are 26" in diameter. A 215/55 17 is 26.2" in dia. Would the down size to get a higher profile for ride quality cause me any issues. Both sizes are 94V rated.
Changing tire sizes on 2010 Honda Accord
My recommendation is to stick with the tire size you have. Changing tire sizes downwards reduces handling capabilities and possibly load carrying capabilities. I can understand that those Michelin's ride hard - I have the same car and same tires. However, the best thing to do is to make sure your air pressure is proper and endure...