RE: 3racing extended chassis for revo
3inches would make a difference, but 3cm is something that the pros are worried about.
Pros that get paid to race will want smaller differences like that because the truck is more stable, and less likely to wheelie. A normal racer will not see the difference enough for it to actually be worth all that money.
Now if it were 1-2 inches longer, then I could see why someone would buy the chassis, because that is a big difference.