Originally Posted by
SLOWINSLOWOUT
For 17.5, run a 72t spur, in 13.5, 76-84t. Roll out will be from hi 70's to mid 80's in 13.5, low 90's to mid 100's in 17.5. So, depending on tire size, will need pinions from 43-58 to cover both classes and all tire sizes. This is with 64p gears, not sure with 48p.
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.