Any reviews/experience with ready lift products?

http://www.readylift.com/default.aspx

 

no lift experience but this might help on tires, the metric tire size is wierd, the first three digits are the width in mm. the second two are the sidewall height in acordance to percentage of the width, which means a 305/60/18 has a width of 305 mm, a sidewall height that is 60% of 305mm ( i cant do the math in my head ) and fits an 18 inch rim, hope this helps in choosing the right size