HPI Monster Truck ForumTalk about HPI monster trucks here. The infamous Savage 21, SS, .25 or any other HPI MT. You can optionally discuss HPI in our general MT discussion forum if you prefer.
do you have it roughin up metal shoes before use. sorta new.
Nope. Basically just put them in and run them. Aluminum shoes need some time to break in , so don't be surprised if you notice slight poor performance at first. It will get better after severall tanks of hard running. Aluminum shoes DO need ocassional "de-burring". The shoe edges develop a sharp burr on the edge that you need to scrape off with a hobby knife.