Sure, the ones I used are Redcat Product# 02078 but any small "o" ring that'll fit inside the drive cups will work.. The fuel tubing/O rings, are installed to keep the bones from flying out when the suspensiongets tweaked (ie: crash,rollover, cartwheel, etc)but ya dont want themso tight that they cant move a little..You''ll know there too tight if the wheels won't spin freely when the suspensionis compressed..