I'm unclear as to what's wrong with the stock wheels and tires. The proportion is perfect, and if you are going to be running on a track Losi has two other 320 size tires. They have the Kingpin, which looks like a Pro-Line holeshot and the other one looks like the Bowtie tire. They also have the Force wheels in black chrome, hell the Zombie max tires would be ok on a loose loamy track.
http://search.horizonhobby.com/index...d=127585E44B4D
I just want the conversion kit so I can hit the track and do some 1/10th scale ownage. What's going to suck is answering a thousand "what's that" questions the first few days at the track.