I have less than 300 miles on these Toyo 195/50/15 and Konig 15x8 +20 combo now I have tried to resolve this vibration or shaking problem on speed between 45-80+ MPH. BTW I am riding on an Eibach and Tokico Illumina kit and alignment set per Flying' Miata spec. I have had the front wheels balanced a couple of times on different places and today I have placed some hub rings on four corners but still the shakes are noticeable especially over higher speeds.

Any suggestions on what I may be missing? Thanks in advance.