I need to replace the original tyres on my YS since they are scary in the wet. The problem is the tyre sizes. I can not get 100/80-18 tyres from a good brand. Michelin used to produce the city pro but when I emailed them I was told it is out of production with no intention to produce. The only choice left is a different size. 100/90-18 or 110/80-18. The rim and bike can take both sizes but both have an additional 10mm in tyre wall height. What do you suggest?