will a 100/90-19 motorcycle tire work for what was orginally on it at a 110/90-19?
Not recommended unless needed for whatever reason. It will fit but handling will be effected a bit.
Tis' best to fit the size the manufacturer recommends for your machine. Will you notice a 10% lack of contact patch? 10% + or - in width is probably only noticeable when trying to fit a larger rear tire. There are clearance issues to consider.
