HI. Picked up a 2016 CRF250l recently(my first bike). I am replacing the tires and my tubes are currently leaking so I am gonna swap them out as well but I am not sure what size tubes to get. I am going to run 90 90 21 on the front and 120 90 18 on the rear. Problem is I cannot find tubes to fit. Not sure what to get where sizes are listed as a range. Ie 2.75/3.00 -21 or 3.00/3.25-21. Would I get the 2.75 3.00 for the front or the 3.00 3.25?
Also does anyone know the range for the rear?