Can I put a small amount of lubricant on my bushings to keep them quiet? I practice on the carpet. Sector9,44"

yeah some lube on the bushings won't hurt and should keep the noise down if not just take it away completely, if they are new you can tighten the trucks a bit to break those bushing in quicker then go back to how loose you like them and they shouldn't squeek, some bushings squeek no matter what so changing them out will help but I always leave that to the last option. thunder 149 are fairly narrow for a long board those are 7.5 wide deck size trucks but it shouldn't really make a differance as long as they work for you.