I read alot of guys running fat rear tires on thier 650L's. I know the stock rim is 2.15 Most 110/100-18 call for a 2.15 rim. Most 120/90-18 call for a 2.50-2.75 rim. Those 130's and 140's seem to be way to big for the rim they are going on. Some 140's call for a 3.50 rim! that over an inch larger than a stock rim. Am I missing something here?