May be a little miscommunication here. Sounds to me like the OP is in the market for taller gearing. As in a smaller front pulley rather than ‘highway gearing’. A 31T front pulley will give more RPM
’s at a given speed. Pretty sure he’s not asking for a smaller rear pulley type modification unless my interpretation of the English language is way off
If you’re hearing pinging, then downshift
I only had to run higher octane to get rid of pinging when it was really hot outside.