[kvrc]

you say the car ready to run is about 6.5lbs? i have weighed many losi 8 b cars all with 4s 5000 lipos and all are no frill race ready cars.
the lightest one i weighed was at 7.9 lbs and that was with the losi conversion, the lighter mamba max esc and a 60mm medusa motor. the other 5 or so i have weighed were about 8.1.
you list the carbon parts reduce it by 147gms or a little over 5oz. where in the world are you reducing another 17oz from?
i understand that tires and rims and some other parts can make a little difference, but the cars i weighed were running micro pin indoor type tires so they were on the lighter side.
so from my experience, the cars i have weighed with your listed carbon parts substituted would still weigh about 7.6 lbs rtr. to make them about 6.5lbs they would need to be weighed without the 500 gm battery.
please enlighten me as to how you come up with those numbers.