I am still waiting for my shipment, but the guys at my track have all switched from pro-line to AKA tires. They all say the difference is night and day. Way more traction, longer wear, less ballooning, and the inserts are not only indestructible, but 100 times better than any other insert out there. They also say that the tire compound is better, less tire roll, more hook up on the edges, and they stay glued alot better than any other tire. No prep work is needed at all, just unpack em, glue em, and race, no scuffing, no washing, no tire bands, no trimming. i cant wait. it's a no-brainer!