Originally Posted by stoneywaves
thanks mean max I would like to know what gears should I be using to compensate for the increase in wheel size 4.10's 3.73's etc.
Use the calculators at www.4lo.com
to calculate gear ratio/tire size/RPM with your current setup and then with the new gears. If you make the calculations using the stock gear/tire size you can see what the RPM's were at a given speed, and then calculate to see what gears would work with the new tire size to make it close to or better than stock.
Fill out your profile so that your questions can be answered more accurately.
If you have an AX-15 5 speed (for example) you would need to know that the 5th gear overdrive ratio is 0.79 to properly calculate RPM's in 5th gear.