I hear ya Will about conventional wisdom, And I was reluctant to run my tires that low. But on the C-5, with these tires it makes a world of difference at high speed.And no sacrifice at the low speed stuff. The G-5 has a different frame set up. Adding a little flex to those low profile tires on the C-5 really helps.
We did alot of testing after we found the fix on my C-5. Just to get it the best that we could.A little bird whispered in my ear to just try it. Man, night and day ! It got rid of that riding on beach ball effect that i was feeling on the C-5. 18 may be too low for some, but try going down to 22 front 24-25 rear. Try it. Go from there. Do your tires feel or look flat? Do they feel greasy? These are not heavy bikes, much lighter then most. I think that has alot to do with it. To be honest I would say, along with the correction of the tail section on my C-5, The tire pressure played, an almost as important factor.
I put 150 miles on my bike yesterday, running 18 - 22. The vast majority of it on country roads, not more then a qtr mile of a straight away. Going anywhere from 35mph to 55mph, ALOT of twisties. My buddy was on a ZRX 1200, and I stayed turn for turn with him
, He may have been being a little nice. Then blasted home on an interstate, cruising at around 70 mph. I had no problem.