Originally Posted by
performula
With 17.5t and the 72t spur, what pinion variation would I need then, that is the only class they run in 1/12. I know this is frowned upon but I plan on starting with full size tires. It makes me cringe to think I'd need to shred half the tire off, plus I don't have a truer. I believe they use Jacos as spec tires. I appreciate the help.
The concept of taking new tires and truing 3/4 of them off is hard to get used to. However, there is a reason for it. Besides the performance difference, which is significant, often times, the bigger tires chunk and end up not lasting longer anyhow.
At our track, you HAVE to true them down, because a car without them cut down will do nothing but traction roll due to the sidewall flex.
The benefits and fun of 1/12th scale outweigh the negatives of having to do this.
Welcome to 1/12th scale!