I have done a lot of research, but keep finding conflicting info. Sheldon Brown says that nearly all RDs can handle a 14-28 6 speed freewheel. I have also seen that the max cog capacity for an ARX is 26, with a total capacity of 28. What is difference between max and total? I want to verify that a Suntour ARX can handle this range. I have got a 52/42 double up front. Any info would be appreciated.