Noticed a similar checking in my 2 year old tires (Vee Rubber) while prepping a scoot for a trip to the Black Hills. No checking on sidewalls near the bead.
It was a mad rush to replace the tires right before leaving. I would not accept the risk of tire failure on the curvy, mountain roads I was going to be traveling.
The few dollars I spent on tire replacement pales in comparison to something else I value much higher. YMMV.
