Hi,

My 2007 DR  has stock sprockets sized at 15/45.  I want to get a little less RPM at 55MPH.  I was wondering do you suggest going up on the front or down on the rear size?  From gearingcommander.com, I found the following:

RPM at 55MPH

15/45 (stock)
6373

16/45
5975

15/43
6009

15/41
5806

I know the stock front sprocket has a rubber surface inside, is that important?  Its probably easier to change the front, but I am leaning towards 15(stock)/43, what do you think?

Thanks!