It seams that some of the most common questions seem to be about what tire and gear ratio to use on our trucks. I made a tire and gear calculator on excel that will give hard data for different combinations. All fields are editable and I used Marlin Crawlers site to find transmission ratios. The defaults are for an R151f.

Here you go.

http://board.marlincrawler.com/index...468#msg1044468

 

I like this one http://www.rocky-road.com/calculator.html

But for absolute maximum, complete and total gear calculation domination http://www.grimmjeeper.com/gears.html

 

We have these old jewels, last updated before Firefox came out:
http://www.marlincrawler.com/java/getratio_calc.html
http://www.marlincrawler.com/java/getspd_calc.html

...Maybe we should build a calc that blows all calcs out of the water. Hmmmm where are my priorities

BigMike