The truck comes standard with 17" wheels.
Many people will tell you you shouldn't change wheel sizes but as long as the OD (outside diameter) is almost the same there is nothing to worry about.
We all know that if you go to a smaller OD you will be overgearing your car and will effectively have more low-end power (plus your speedo will read more mileage than actually travelled). The opposite is then true for going to a larger OD (undergearing, better top end, less miles).
I know there is a wheel size calculator on the net somewhere, I just always do the calculations myself.
For example on my Civic I have run 175-70-13, 185-60-14, 195-50-15 and 205-40-16 tires that are all within a few millimeters of OD. I currently run 205-50-15 race tires and 205-40-17 street tires (both of which are a little taller than stock) with no problems either...
As an example for your CR-V, stock tire size is 205-70-15, the OD is 668mm (by my calculations) say you wanted to go to a 19" rim... a 225-40-19 would have a OD of 662.6mm, which is actually a tad shorter.
Just did the math for a Ridgeline too, I calculate the stock OD (245-65-17) at 750.3mm, so for example (I'm not sure if these tire sizes exist) but a 245-60-18 (751.2mm) or a 245-50-20 (753mm) or a 245-45-21 (753.9mm) or a 245-40-22 (754.8mm) would be about as close as you could get...
Man am I longwinded...
