which size will be the best for me to run on a 7 in wide wheel? the mt 24.5x8-15 or the mandh 24.5x8.5-15? any help would be appreciated.

 

depends on what the tire specs say. look at the manufacturers tire spec recomendations. some 8" wide slicks can fit on 7" and some 8.5" can fit on 7" as well. rule of thumb is somewhere between 1-1.5" from the rim width is ok

 

are you asking about fitment or about gearing?