I must have been under a rock.
There is a new tire size measurement for knobbies.
The old way was knobby width.
The new way is carcass width.
Here's the conversion.
Front:
Metric Old ....................... Metric ......................... Inch
60/ 100---------------------- 90/ 80----------------- 2.50/ 2.75
70/ 100----------------------90/ 90-------------------2.75/ 3.00
80/ 100---------------------100/ 80-------------------3.00/ 3.25
Rear:
Metric Old.........................Metric....................Inch
80/ 100-----------------------80/ 90------------2.50/ 3.60
90/ 100---------------------110/ 80-------------3.60/ 4.10
100/ 100--------------------120/ 80------------ 4.00/ 4.10
110/ 100-------------------130/ 80--------------4.00/ 4.50
120/ 100-------------------140/ 80---------------5.00/ 5.10
There is a new tire size measurement for knobbies.
The old way was knobby width.
The new way is carcass width.
Here's the conversion.
Front:
Metric Old ....................... Metric ......................... Inch
60/ 100---------------------- 90/ 80----------------- 2.50/ 2.75
70/ 100----------------------90/ 90-------------------2.75/ 3.00
80/ 100---------------------100/ 80-------------------3.00/ 3.25
Rear:
Metric Old.........................Metric....................Inch
80/ 100-----------------------80/ 90------------2.50/ 3.60
90/ 100---------------------110/ 80-------------3.60/ 4.10
100/ 100--------------------120/ 80------------ 4.00/ 4.10
110/ 100-------------------130/ 80--------------4.00/ 4.50
120/ 100-------------------140/ 80---------------5.00/ 5.10