Well...I ride 235 then get on 35/80 for a short haul to work normally on my big bike....I would never do it stock on the Grom. I can comfortably cruise around 50 as of right now bone stock. When the performance market catches up I see no reason why it wouldn't be possible. I hope trail bikes starts building parts for these. Love them in the pit bike scene. As far as heavy traffic, I LOVE it. Gets around way better than my Harley. Only thing I will say is people never see you so I apply lots of horn and middle finger.