No advice on the article but thanks for trying
Apologies, the link to the old GMS system has been discontinued. If I remember correctly , it comes close to 26 - 2.25.No advice on the article but thanks for trying
Normally two tyre cross section sizes with a / between means one is width and the other height but I forget which is which.Seems an odd mix of imperial and metric
Assuming latter are mm it translates to 26“ x 1.9-2.1”
Your wheels are not this size. Your tubes may be.I can't find out what size my wheels are in ETRTO equivalent of 26x49/54 this size doesn't appear on any charts or tyre sizing websites anywhere