33", or 35" tires?..... some interesting data
The difference in switching from 31" to 33" tires is 6%. So,.... read your tach at freeway RPM's and multiply by .94. Then decides how the engine reacts at this RPM. Keep it in the same gear. Do this at varying speeds to get an idea of the new torque curve. The move to 35" tires is much more dramatic (12%) so multiply RPM's by.88 and do the same.
I'm sold on 33's. the only disadvantage I see is the smaller diameter which sinks further into holes & pockets.