18-05-15, 10:19 AM
I think Nickcrisp did the same as you (went from a is17 to a RHPA ) and said it was quieter. Although my is17 is quieter than my 12 year old HJC it replaced it would be nice to be quieter - I do wear earplugs. But the fact that the RHPA does not have a flip down visor was a deal breaker for me, perhaps that is what makes it quieter.
I don't do rain or threat there of. dry rider only with no shame.