I just wanted to give a shout out to Roadster Renovations.

I had the dreaded 70MPH vibration in my 2018 RTL.

After doing a lot of research on these forums it came to my attention that it was a drive belt issue.

More research revealed that the cure to that vibration was a vibration dampener.

A few different brands are mentioned but I decided to go with the Roadster Renovations dampener.

Their dampener completely took all the vibration out of the Spyder.

I can now ride comfortably at 70+ mph.

Thanks, Roadster Renovations!