Hello,
A lot of riders run these on their mini motos in Ontario Canada, like them, and are competitive. A good alternative to more expensive PMT tires. I ride PMT T40's & T41's and the grip level with the T41 medium compound is amazing. I find my T40's are a little too hard, but great for those hot summer track days and will last all season. Seems the V217's are somewhere in between the T40 and T41 compound hardness.
Riders in the U.K. were complaining about shedding tires in one race meet, but they were a softer compound. I believe the V217 is the medium compound and will hold up well.
New Vee Rubber Mini Moto Tyres - MiniMotoClub
Cheers,
Greg