“Russell – Are all the 2018 and later tires the new, problematic compound?”
YES-The older vintage do not seem to marble or shed like the 2018 versions. Not sure if any 2019 or newer are affected.
The 2018s have a noticeable white sticker on them, so they are easy to ID.
When truing the 2018 F30s, do not use Lighter-fluid. When smoothing/dressing before a heat, only use lighter-fluid on a rag with a light rub.
"... get on your bad motor scooter and ride!"
Sammy with Montrose