I will simply say that I have spoken to people in absolute knowledge and wheel spacers are dangerous to the front suspension geometry.
If you want to modify the front end of a G2 take a look at some foreign Pilot suspension parts (including factory engineered skid plates) that offer additional ground clearance. Aftermarket does not need to meet any safety standards.
Keep yourself and your family safe. Don't use wheel spacers. Use the foreign parts that were engineered for the Pilot (essentially identical to the Ridgeline). They also have higher capacity braking systems for those same countries. I'm bound my my own morals, but if you search my posts for 180mm I think you'll find what you're looking for.
The Ridgeline is a Pilot suspension. Don't go looking for magic that doesn't exist, or is dangerous at best. I don't care how you feel about this post, but it is honest. If you don't care about the safety of you or your family or passengers go for this aftermarket crap. They have no regulations or responsibility. They all make the "for off road use ONLY" disclaimer in the fine print. That won't help much when you killed your own kid or a loved one for something as stupid as a wheel spacer.
Do you own engineering investigation and learn what an entire change of front suspension really means. It can turn a safe vehicle into a DEATH trap. On the USA Ridgeline the limits of safety have been met with the Ridgeline. There are other countries with the proper parts.
Wheel spacers and big tires that pull the axles out of the safe zone do nothing but BAD, BAD, things. And don't even start by telling me that "nobody else has had a problem". That's 100% wrong and people are DEAD as a result.
No, I did not read this entire thread. I don't care about opinions but I do care about the facts, figures, and engineering design that I do know about. Drive a 63 Impala and see who dies in a head on collision with an Accord, Camry, Malibu, Taurus, Gemini, or any other modern brand. YOU END UP DEAD.
If that makes you feel COOL then you deserve exactly what will be the result if you make such changes... and no the aftermarket company is NOT responsible because you agreed in the fine print that is was for "offroad use only". You are the one responsible for your one responsible.... nobody else.
I've done maybe a 1000 crash tests with various OEM and aftermarket configurations. I KNOW THE ANSWERS. But ignorance is bliss. Be an out of control idiot with a dead family. That's what will eventually happen to someone. Those front axles are at their limit and the lower control arm needs to be replaced for larger tires or any other geometry changes. Fools but you think you look cool. How pathetic.
